/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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-05 23:23:51,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-05 23:23:51,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-05 23:23:51,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-05 23:23:51,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-05 23:23:51,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-05 23:23:51,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-05 23:23:51,947 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 [2021-05-05 23:23:51,974 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-05 23:23:51,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-05 23:23:51,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-05 23:23:51,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-05 23:23:51,977 INFO L138 SettingsManager]: * Use SBE=true [2021-05-05 23:23:51,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-05 23:23:51,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-05 23:23:51,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-05 23:23:51,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-05 23:23:51,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-05 23:23:51,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-05 23:23:51,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-05 23:23:51,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-05 23:23:51,978 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-05 23:23:51,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-05 23:23:51,978 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-05 23:23:51,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-05 23:23:51,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-05 23:23:51,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-05 23:23:51,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-05 23:23:51,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-05 23:23:51,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-05 23:23:51,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-05 23:23:51,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-05 23:23:51,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-05 23:23:51,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-05 23:23:51,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-05 23:23:51,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-05 23:23:51,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-05 23:23:52,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-05 23:23:52,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-05 23:23:52,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-05 23:23:52,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-05 23:23:52,394 INFO L275 PluginConnector]: CDTParser initialized [2021-05-05 23:23:52,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-05-05 23:23:52,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9772bc742/98d8f472081843b2acd72a08b7754c5b/FLAG854198f97 [2021-05-05 23:23:52,860 INFO L306 CDTParser]: Found 1 translation units. [2021-05-05 23:23:52,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-05-05 23:23:52,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9772bc742/98d8f472081843b2acd72a08b7754c5b/FLAG854198f97 [2021-05-05 23:23:52,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9772bc742/98d8f472081843b2acd72a08b7754c5b [2021-05-05 23:23:52,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-05 23:23:52,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-05 23:23:52,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-05 23:23:52,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-05 23:23:52,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-05 23:23:52,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.05 11:23:52" (1/1) ... [2021-05-05 23:23:52,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d59637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:52, skipping insertion in model container [2021-05-05 23:23:52,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.05 11:23:52" (1/1) ... [2021-05-05 23:23:52,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-05 23:23:52,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-05 23:23:53,028 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/for_bounded_loop1.c[416,429] [2021-05-05 23:23:53,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-05 23:23:53,045 INFO L203 MainTranslator]: Completed pre-run [2021-05-05 23:23:53,053 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/for_bounded_loop1.c[416,429] [2021-05-05 23:23:53,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-05 23:23:53,068 INFO L208 MainTranslator]: Completed translation [2021-05-05 23:23:53,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53 WrapperNode [2021-05-05 23:23:53,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-05 23:23:53,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-05 23:23:53,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-05 23:23:53,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-05 23:23:53,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53" (1/1) ... [2021-05-05 23:23:53,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53" (1/1) ... [2021-05-05 23:23:53,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53" (1/1) ... [2021-05-05 23:23:53,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53" (1/1) ... [2021-05-05 23:23:53,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53" (1/1) ... [2021-05-05 23:23:53,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53" (1/1) ... [2021-05-05 23:23:53,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53" (1/1) ... [2021-05-05 23:23:53,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-05 23:23:53,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-05 23:23:53,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-05 23:23:53,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-05 23:23:53,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53" (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 [2021-05-05 23:23:53,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-05 23:23:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-05 23:23:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-05 23:23:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-05 23:23:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-05 23:23:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-05 23:23:53,214 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-05 23:23:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-05 23:23:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-05 23:23:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-05 23:23:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-05 23:23:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-05 23:23:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-05 23:23:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-05 23:23:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-05 23:23:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-05 23:23:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-05 23:23:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-05 23:23:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-05 23:23:53,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-05 23:23:53,440 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-05 23:23:53,440 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-05 23:23:53,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.05 11:23:53 BoogieIcfgContainer [2021-05-05 23:23:53,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-05 23:23:53,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-05 23:23:53,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-05 23:23:53,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-05 23:23:53,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.05 11:23:52" (1/3) ... [2021-05-05 23:23:53,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3eb13e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.05 11:23:53, skipping insertion in model container [2021-05-05 23:23:53,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.05 11:23:53" (2/3) ... [2021-05-05 23:23:53,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3eb13e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.05 11:23:53, skipping insertion in model container [2021-05-05 23:23:53,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.05 11:23:53" (3/3) ... [2021-05-05 23:23:53,446 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-05-05 23:23:53,450 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-05 23:23:53,452 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-05 23:23:53,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-05 23:23:53,480 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-05 23:23:53,481 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-05 23:23:53,481 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-05 23:23:53,481 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-05 23:23:53,481 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-05 23:23:53,481 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-05 23:23:53,481 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-05 23:23:53,481 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-05 23:23:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-05 23:23:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-05 23:23:53,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:23:53,493 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:23:53,493 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:23:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:23:53,497 INFO L82 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 1 times [2021-05-05 23:23:53,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:23:53,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139843156] [2021-05-05 23:23:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:23:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:23:53,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:23:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:23:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:23:53,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:23:53,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139843156] [2021-05-05 23:23:53,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139843156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-05 23:23:53,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-05 23:23:53,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-05 23:23:53,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189086911] [2021-05-05 23:23:53,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-05 23:23:53,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:23:53,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-05 23:23:53,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-05 23:23:53,731 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-05-05 23:23:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:23:53,784 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-05 23:23:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-05 23:23:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-05 23:23:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:23:53,790 INFO L225 Difference]: With dead ends: 41 [2021-05-05 23:23:53,790 INFO L226 Difference]: Without dead ends: 20 [2021-05-05 23:23:53,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-05 23:23:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-05 23:23:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-05 23:23:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-05 23:23:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-05 23:23:53,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-05-05 23:23:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:23:53,824 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-05 23:23:53,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-05-05 23:23:53,825 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-05 23:23:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-05 23:23:53,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:23:53,826 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:23:53,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-05 23:23:53,826 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:23:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:23:53,827 INFO L82 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 1 times [2021-05-05 23:23:53,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:23:53,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415867633] [2021-05-05 23:23:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:23:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:23:53,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:23:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:23:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:23:53,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:23:53,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415867633] [2021-05-05 23:23:53,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415867633] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-05 23:23:53,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-05 23:23:53,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-05 23:23:53,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74426647] [2021-05-05 23:23:53,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-05 23:23:53,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:23:53,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-05 23:23:53,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-05 23:23:53,932 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-05-05 23:23:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:23:54,052 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-05 23:23:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-05 23:23:54,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-05 23:23:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:23:54,054 INFO L225 Difference]: With dead ends: 33 [2021-05-05 23:23:54,055 INFO L226 Difference]: Without dead ends: 26 [2021-05-05 23:23:54,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-05 23:23:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-05 23:23:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-05-05 23:23:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-05 23:23:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-05 23:23:54,070 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2021-05-05 23:23:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:23:54,071 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-05 23:23:54,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-05-05 23:23:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-05 23:23:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-05 23:23:54,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:23:54,074 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:23:54,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-05 23:23:54,075 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:23:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:23:54,076 INFO L82 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 1 times [2021-05-05 23:23:54,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:23:54,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456074763] [2021-05-05 23:23:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:23:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:23:54,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:23:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:23:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:23:54,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:23:54,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456074763] [2021-05-05 23:23:54,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456074763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-05 23:23:54,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-05 23:23:54,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-05 23:23:54,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739776177] [2021-05-05 23:23:54,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-05 23:23:54,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:23:54,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-05 23:23:54,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-05 23:23:54,183 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-05-05 23:23:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:23:54,387 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-05 23:23:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-05 23:23:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 12 [2021-05-05 23:23:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:23:54,390 INFO L225 Difference]: With dead ends: 30 [2021-05-05 23:23:54,390 INFO L226 Difference]: Without dead ends: 28 [2021-05-05 23:23:54,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-05 23:23:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-05 23:23:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-05-05 23:23:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-05 23:23:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-05 23:23:54,402 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-05-05 23:23:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:23:54,402 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-05 23:23:54,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-05-05 23:23:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-05 23:23:54,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-05 23:23:54,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:23:54,403 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:23:54,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-05 23:23:54,403 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:23:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:23:54,404 INFO L82 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 1 times [2021-05-05 23:23:54,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:23:54,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506794173] [2021-05-05 23:23:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:23:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:23:54,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-05 23:23:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:23:54,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-05 23:23:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-05 23:23:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-05 23:23:54,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-05 23:23:54,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506794173] [2021-05-05 23:23:54,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506794173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-05 23:23:54,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-05 23:23:54,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-05 23:23:54,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215390770] [2021-05-05 23:23:54,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-05 23:23:54,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-05 23:23:54,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-05 23:23:54,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-05 23:23:54,529 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-05 23:23:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-05 23:23:54,755 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-05 23:23:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-05 23:23:54,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-05-05 23:23:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-05 23:23:54,757 INFO L225 Difference]: With dead ends: 38 [2021-05-05 23:23:54,757 INFO L226 Difference]: Without dead ends: 36 [2021-05-05 23:23:54,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-05 23:23:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-05 23:23:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-05-05 23:23:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-05 23:23:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-05 23:23:54,762 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2021-05-05 23:23:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-05 23:23:54,762 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-05 23:23:54,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-05 23:23:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-05 23:23:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-05 23:23:54,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-05 23:23:54,763 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-05 23:23:54,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-05 23:23:54,763 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-05 23:23:54,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-05 23:23:54,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1861509246, now seen corresponding path program 1 times [2021-05-05 23:23:54,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-05 23:23:54,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501815047] [2021-05-05 23:23:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-05 23:23:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-05 23:23:54,772 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-05 23:23:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-05 23:23:54,781 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-05 23:23:54,795 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-05 23:23:54,795 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-05 23:23:54,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-05 23:23:54,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.05 11:23:54 BoogieIcfgContainer [2021-05-05 23:23:54,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-05 23:23:54,814 INFO L168 Benchmark]: Toolchain (without parser) took 1932.01 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 135.8 MB in the beginning and 120.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 49.9 MB. Max. memory is 8.0 GB. [2021-05-05 23:23:54,815 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 172.0 MB. Free memory is still 154.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-05 23:23:54,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.46 ms. Allocated memory is still 172.0 MB. Free memory was 135.4 MB in the beginning and 126.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-05 23:23:54,815 INFO L168 Benchmark]: Boogie Preprocessor took 63.53 ms. Allocated memory is still 172.0 MB. Free memory was 126.0 MB in the beginning and 155.0 MB in the end (delta: -29.1 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-05 23:23:54,816 INFO L168 Benchmark]: RCFGBuilder took 307.32 ms. Allocated memory is still 172.0 MB. Free memory was 155.0 MB in the beginning and 140.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-05 23:23:54,816 INFO L168 Benchmark]: TraceAbstraction took 1371.51 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 140.3 MB in the beginning and 120.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 55.0 MB. Max. memory is 8.0 GB. [2021-05-05 23:23:54,818 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 172.0 MB. Free memory is still 154.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 170.46 ms. Allocated memory is still 172.0 MB. Free memory was 135.4 MB in the beginning and 126.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.53 ms. Allocated memory is still 172.0 MB. Free memory was 126.0 MB in the beginning and 155.0 MB in the end (delta: -29.1 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 307.32 ms. Allocated memory is still 172.0 MB. Free memory was 155.0 MB in the beginning and 140.7 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1371.51 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 140.3 MB in the beginning and 120.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 55.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 VAL [i=0, n=1, x=0, y=0] [L22] COND TRUE i