/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/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 11:49:50,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 11:49:50,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 11:49:50,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 11:49:50,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 11:49:50,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 11:49:50,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 11:49:50,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 11:49:50,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 11:49:50,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 11:49:50,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 11:49:50,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 11:49:50,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 11:49:50,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 11:49:50,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 11:49:50,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 11:49:50,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 11:49:50,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 11:49:50,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 11:49:50,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 11:49:50,522 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 11:49:50,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 11:49:50,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 11:49:50,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 11:49:50,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 11:49:50,538 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 11:49:50,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 11:49:50,538 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 11:49:50,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 11:49:50,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 11:49:50,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 11:49:50,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 11:49:50,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 11:49:50,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 11:49:50,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 11:49:50,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 11:49:50,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 11:49:50,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 11:49:50,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 11:49:50,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 11:49:50,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 11:49:50,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 11:49:50,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 11:49:50,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 11:49:50,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 11:49:50,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 11:49:50,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 11:49:50,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 11:49:50,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 11:49:50,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 11:49:50,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 11:49:50,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 11:49:50,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 11:49:50,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 11:49:50,784 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 11:49:50,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2021-05-02 11:49:50,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553dcbcce/3f6cebaf08c94c22949c3d8f2ae0b7ec/FLAGce215c109 [2021-05-02 11:49:51,139 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 11:49:51,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2021-05-02 11:49:51,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553dcbcce/3f6cebaf08c94c22949c3d8f2ae0b7ec/FLAGce215c109 [2021-05-02 11:49:51,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553dcbcce/3f6cebaf08c94c22949c3d8f2ae0b7ec [2021-05-02 11:49:51,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 11:49:51,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 11:49:51,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 11:49:51,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 11:49:51,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 11:49:51,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46417f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51, skipping insertion in model container [2021-05-02 11:49:51,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 11:49:51,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 11:49:51,681 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2021-05-02 11:49:51,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:49:51,772 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 11:49:51,787 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2021-05-02 11:49:51,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:49:51,831 INFO L208 MainTranslator]: Completed translation [2021-05-02 11:49:51,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51 WrapperNode [2021-05-02 11:49:51,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 11:49:51,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 11:49:51,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 11:49:51,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 11:49:51,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 11:49:51,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 11:49:51,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 11:49:51,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 11:49:51,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (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 11:49:51,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 11:49:51,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 11:49:51,980 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 11:49:51,980 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 11:49:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 11:49:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 11:49:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 11:49:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 11:49:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 11:49:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 11:49:51,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 11:49:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 11:49:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 11:49:51,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-02 11:49:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 11:49:51,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 11:49:52,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 11:49:52,184 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 11:49:52,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:49:52 BoogieIcfgContainer [2021-05-02 11:49:52,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 11:49:52,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 11:49:52,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 11:49:52,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 11:49:52,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:49:51" (1/3) ... [2021-05-02 11:49:52,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe3a47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:49:52, skipping insertion in model container [2021-05-02 11:49:52,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (2/3) ... [2021-05-02 11:49:52,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe3a47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:49:52, skipping insertion in model container [2021-05-02 11:49:52,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:49:52" (3/3) ... [2021-05-02 11:49:52,190 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2021-05-02 11:49:52,193 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 11:49:52,196 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 11:49:52,206 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 11:49:52,220 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 11:49:52,220 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 11:49:52,220 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 11:49:52,220 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 11:49:52,220 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 11:49:52,220 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 11:49:52,221 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 11:49:52,221 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 11:49:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 11:49:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 11:49:52,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:52,251 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:52,251 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:52,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2021-05-02 11:49:52,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:52,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926898313] [2021-05-02 11:49:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,498 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 11:49:52,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:52,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926898313] [2021-05-02 11:49:52,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926898313] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:49:52,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:49:52,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 11:49:52,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906709969] [2021-05-02 11:49:52,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 11:49:52,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:52,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 11:49:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:49:52,512 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:52,566 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2021-05-02 11:49:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 11:49:52,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 11:49:52,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:52,573 INFO L225 Difference]: With dead ends: 42 [2021-05-02 11:49:52,573 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 11:49:52,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:49:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 11:49:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-05-02 11:49:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-05-02 11:49:52,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-05-02 11:49:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:52,596 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-05-02 11:49:52,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-05-02 11:49:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 11:49:52,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:52,597 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:52,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 11:49:52,597 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:52,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2021-05-02 11:49:52,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:52,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175776331] [2021-05-02 11:49:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,667 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 11:49:52,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:52,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175776331] [2021-05-02 11:49:52,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175776331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:49:52,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:49:52,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 11:49:52,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151289551] [2021-05-02 11:49:52,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 11:49:52,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:52,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 11:49:52,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 11:49:52,670 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:52,767 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-05-02 11:49:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 11:49:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 11:49:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:52,768 INFO L225 Difference]: With dead ends: 36 [2021-05-02 11:49:52,768 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 11:49:52,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 11:49:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 11:49:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2021-05-02 11:49:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-05-02 11:49:52,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-05-02 11:49:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:52,772 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-05-02 11:49:52,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-05-02 11:49:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 11:49:52,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:52,776 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:52,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 11:49:52,776 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2021-05-02 11:49:52,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:52,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871421585] [2021-05-02 11:49:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:52,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:52,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871421585] [2021-05-02 11:49:52,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871421585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:49:52,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:49:52,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 11:49:52,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727638116] [2021-05-02 11:49:52,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 11:49:52,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:52,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 11:49:52,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 11:49:52,872 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:52,988 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 11:49:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 11:49:52,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 11:49:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:52,990 INFO L225 Difference]: With dead ends: 40 [2021-05-02 11:49:52,990 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 11:49:52,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 11:49:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 11:49:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2021-05-02 11:49:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 11:49:53,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-05-02 11:49:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:53,007 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 11:49:53,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 11:49:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 11:49:53,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:53,009 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:53,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 11:49:53,009 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2021-05-02 11:49:53,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:53,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712186313] [2021-05-02 11:49:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:53,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:53,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:53,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712186313] [2021-05-02 11:49:53,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712186313] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:49:53,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:49:53,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 11:49:53,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524708907] [2021-05-02 11:49:53,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 11:49:53,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 11:49:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 11:49:53,102 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:53,164 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-05-02 11:49:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 11:49:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 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 11:49:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:53,168 INFO L225 Difference]: With dead ends: 31 [2021-05-02 11:49:53,168 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 11:49:53,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 11:49:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 11:49:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-05-02 11:49:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 11:49:53,179 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2021-05-02 11:49:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:53,179 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 11:49:53,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 11:49:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 11:49:53,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:53,180 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:53,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 11:49:53,180 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:53,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2021-05-02 11:49:53,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:53,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755791579] [2021-05-02 11:49:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:53,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:53,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:53,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755791579] [2021-05-02 11:49:53,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755791579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:53,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944558249] [2021-05-02 11:49:53,304 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 11:49:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:53,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 11:49:53,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:49:53,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:53,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944558249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:53,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:49:53,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 11:49:53,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630006797] [2021-05-02 11:49:53,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 11:49:53,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:53,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 11:49:53,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 11:49:53,428 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 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 11:49:53,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:53,510 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 11:49:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 11:49:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 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 17 [2021-05-02 11:49:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:53,512 INFO L225 Difference]: With dead ends: 34 [2021-05-02 11:49:53,512 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 11:49:53,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 11:49:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 11:49:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-05-02 11:49:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-02 11:49:53,524 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-05-02 11:49:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:53,524 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-02 11:49:53,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 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 11:49:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-02 11:49:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 11:49:53,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:53,526 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:53,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:49:53,745 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 2 times [2021-05-02 11:49:53,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:53,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525835466] [2021-05-02 11:49:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:53,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:53,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:53,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525835466] [2021-05-02 11:49:53,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525835466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:53,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889336065] [2021-05-02 11:49:53,833 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 11:49:53,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 11:49:53,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:49:53,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 11:49:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:49:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 11:49:53,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889336065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:49:53,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 11:49:53,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-05-02 11:49:53,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285581095] [2021-05-02 11:49:53,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 11:49:53,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:53,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 11:49:53,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 11:49:53,943 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:53,949 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-05-02 11:49:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 11:49:53,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 11:49:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:53,949 INFO L225 Difference]: With dead ends: 20 [2021-05-02 11:49:53,949 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 11:49:53,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 11:49:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 11:49:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 11:49:53,951 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 11:49:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 11:49:53,951 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-05-02 11:49:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:53,951 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 11:49:53,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 11:49:53,951 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 11:49:54,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:49:54,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 11:49:54,239 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 11:49:54,239 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 11:49:54,239 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 11:49:54,239 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 11:49:54,239 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#memory_int| |old(#memory_int)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= |~#array~0.base| |old(~#array~0.base)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |~#array~0.offset| |old(~#array~0.offset)|)) [2021-05-02 11:49:54,239 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 11:49:54,239 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 11:49:54,240 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 11:49:54,240 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 11:49:54,240 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 11:49:54,240 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 7 23) no Hoare annotation was computed. [2021-05-02 11:49:54,240 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 7 23) no Hoare annotation was computed. [2021-05-02 11:49:54,240 INFO L198 CegarLoopUtils]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2021-05-02 11:49:54,240 INFO L194 CegarLoopUtils]: At program point L13-3(lines 13 15) the Hoare annotation is: (= main_~a~0 1) [2021-05-02 11:49:54,240 INFO L198 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-05-02 11:49:54,240 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 7 23) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2021-05-02 11:49:54,240 INFO L194 CegarLoopUtils]: At program point L18(lines 8 23) the Hoare annotation is: false [2021-05-02 11:49:54,240 INFO L198 CegarLoopUtils]: For program point L14-2(lines 14 15) no Hoare annotation was computed. [2021-05-02 11:49:54,240 INFO L194 CegarLoopUtils]: At program point L14-3(lines 14 15) the Hoare annotation is: (= main_~a~0 1) [2021-05-02 11:49:54,240 INFO L198 CegarLoopUtils]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2021-05-02 11:49:54,241 INFO L194 CegarLoopUtils]: At program point L12-3(lines 12 15) the Hoare annotation is: (= main_~a~0 1) [2021-05-02 11:49:54,241 INFO L198 CegarLoopUtils]: For program point L12-4(lines 8 23) no Hoare annotation was computed. [2021-05-02 11:49:54,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:49:54 BoogieIcfgContainer [2021-05-02 11:49:54,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 11:49:54,251 INFO L168 Benchmark]: Toolchain (without parser) took 2686.79 ms. Allocated memory was 177.2 MB in the beginning and 220.2 MB in the end (delta: 43.0 MB). Free memory was 140.3 MB in the beginning and 172.6 MB in the end (delta: -32.3 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:54,251 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 177.2 MB. Free memory is still 157.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 11:49:54,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.30 ms. Allocated memory is still 177.2 MB. Free memory was 140.1 MB in the beginning and 131.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:54,251 INFO L168 Benchmark]: Boogie Preprocessor took 72.10 ms. Allocated memory is still 177.2 MB. Free memory was 131.3 MB in the beginning and 161.1 MB in the end (delta: -29.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:54,251 INFO L168 Benchmark]: RCFGBuilder took 279.29 ms. Allocated memory is still 177.2 MB. Free memory was 161.1 MB in the beginning and 145.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:54,252 INFO L168 Benchmark]: TraceAbstraction took 2063.71 ms. Allocated memory was 177.2 MB in the beginning and 220.2 MB in the end (delta: 43.0 MB). Free memory was 145.4 MB in the beginning and 172.6 MB in the end (delta: -27.1 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2021-05-02 11:49:54,252 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 177.2 MB. Free memory is still 157.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 264.30 ms. Allocated memory is still 177.2 MB. Free memory was 140.1 MB in the beginning and 131.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.10 ms. Allocated memory is still 177.2 MB. Free memory was 131.3 MB in the beginning and 161.1 MB in the end (delta: -29.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 279.29 ms. Allocated memory is still 177.2 MB. Free memory was 161.1 MB in the beginning and 145.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2063.71 ms. Allocated memory was 177.2 MB in the beginning and 220.2 MB in the end (delta: 43.0 MB). Free memory was 145.4 MB in the beginning and 172.6 MB in the end (delta: -27.1 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: 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 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1957.8ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 25.2ms, AutomataDifference: 452.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 62.1ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 87 SDtfs, 66 SDslu, 56 SDs, 0 SdLazy, 128 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 175.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 367.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=5, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 15 NumberOfFragments, 55 HoareAnnotationTreeSize, 8 FomulaSimplifications, 514 FormulaSimplificationTreeSizeReduction, 19.1ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 38.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 40.4ms SsaConstructionTime, 134.3ms SatisfiabilityAnalysisTime, 613.4ms InterpolantComputationTime, 117 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 419 SizeOfPredicates, 7 NumberOfNonLiveVariables, 232 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 15/21 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: 14]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: a == 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...