/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:37:05,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:37:05,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:37:05,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:37:05,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:37:05,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:37:05,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:37:05,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:37:05,171 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:37:05,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:37:05,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:37:05,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:37:05,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:37:05,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:37:05,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:37:05,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:37:05,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:37:05,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:37:05,175 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:37:05,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:37:05,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:37:05,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:37:05,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:37:05,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:37:05,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:37:05,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:37:05,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:37:05,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:37:05,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:37:05,177 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:37:05,177 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:37:05,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:37:05,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:37:05,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:37:05,463 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:37:05,464 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:37:05,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-05-06 05:37:05,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af487d6f/ac2ba78173864c63bff601288df146fd/FLAGe34414c75 [2021-05-06 05:37:05,820 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:37:05,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-05-06 05:37:05,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af487d6f/ac2ba78173864c63bff601288df146fd/FLAGe34414c75 [2021-05-06 05:37:06,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9af487d6f/ac2ba78173864c63bff601288df146fd [2021-05-06 05:37:06,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:37:06,266 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:37:06,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:37:06,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:37:06,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:37:06,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1caaad60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06, skipping insertion in model container [2021-05-06 05:37:06,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:37:06,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:37:06,404 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/while_infinite_loop_4.c[333,346] [2021-05-06 05:37:06,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:37:06,419 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:37:06,429 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/while_infinite_loop_4.c[333,346] [2021-05-06 05:37:06,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:37:06,442 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:37:06,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06 WrapperNode [2021-05-06 05:37:06,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:37:06,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:37:06,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:37:06,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:37:06,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:37:06,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:37:06,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:37:06,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:37:06,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06" (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 [2021-05-06 05:37:06,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:37:06,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:37:06,617 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:37:06,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:37:06,617 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2021-05-06 05:37:06,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:37:06,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:37:06,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:37:06,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:37:06,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:37:06,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:37:06,618 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2021-05-06 05:37:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:37:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:37:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:37:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:37:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:37:06,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:37:06,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:37:06,834 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:37:06,834 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 05:37:06,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:37:06 BoogieIcfgContainer [2021-05-06 05:37:06,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:37:06,835 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:37:06,835 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:37:06,836 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:37:06,838 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:37:06" (1/1) ... [2021-05-06 05:37:06,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:37:06 BasicIcfg [2021-05-06 05:37:06,867 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:37:06,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:37:06,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:37:06,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:37:06,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:37:06" (1/4) ... [2021-05-06 05:37:06,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77255242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:37:06, skipping insertion in model container [2021-05-06 05:37:06,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:37:06" (2/4) ... [2021-05-06 05:37:06,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77255242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:37:06, skipping insertion in model container [2021-05-06 05:37:06,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:37:06" (3/4) ... [2021-05-06 05:37:06,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77255242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:37:06, skipping insertion in model container [2021-05-06 05:37:06,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:37:06" (4/4) ... [2021-05-06 05:37:06,872 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.cJordan [2021-05-06 05:37:06,889 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:37:06,892 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:37:06,903 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:37:06,926 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:37:06,926 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:37:06,926 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:37:06,926 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:37:06,926 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:37:06,926 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:37:06,926 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:37:06,926 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:37:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:37:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-06 05:37:06,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:37:06,945 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:37:06,946 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:37:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:37:06,949 INFO L82 PathProgramCache]: Analyzing trace with hash -459487812, now seen corresponding path program 1 times [2021-05-06 05:37:06,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:37:06,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093635040] [2021-05-06 05:37:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:37:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:07,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:37:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:37:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:37:07,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:37:07,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093635040] [2021-05-06 05:37:07,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093635040] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:37:07,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:37:07,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:37:07,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717718679] [2021-05-06 05:37:07,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:37:07,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:37:07,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:37:07,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:37:07,110 INFO L87 Difference]: Start difference. First operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-05-06 05:37:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:37:07,149 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-05-06 05:37:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:37:07,150 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), 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 10 [2021-05-06 05:37:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:37:07,155 INFO L225 Difference]: With dead ends: 19 [2021-05-06 05:37:07,155 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 05:37:07,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:37:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 05:37:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-05-06 05:37:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:37:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-06 05:37:07,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2021-05-06 05:37:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:37:07,179 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-06 05:37:07,179 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), 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) [2021-05-06 05:37:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-06 05:37:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 05:37:07,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:37:07,181 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:37:07,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:37:07,182 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:37:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:37:07,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2132896698, now seen corresponding path program 1 times [2021-05-06 05:37:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:37:07,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006019497] [2021-05-06 05:37:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:37:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 05:37:07,209 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 05:37:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 05:37:07,237 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 05:37:07,251 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 05:37:07,251 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 05:37:07,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:37:07,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:37:07 BasicIcfg [2021-05-06 05:37:07,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:37:07,269 INFO L168 Benchmark]: Toolchain (without parser) took 1002.76 ms. Allocated memory is still 198.2 MB. Free memory was 163.1 MB in the beginning and 136.2 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:07,269 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 198.2 MB. Free memory was 179.6 MB in the beginning and 179.5 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:37:07,270 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.26 ms. Allocated memory is still 198.2 MB. Free memory was 162.9 MB in the beginning and 153.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:07,270 INFO L168 Benchmark]: Boogie Preprocessor took 66.14 ms. Allocated memory is still 198.2 MB. Free memory was 153.7 MB in the beginning and 181.7 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:07,271 INFO L168 Benchmark]: RCFGBuilder took 324.73 ms. Allocated memory is still 198.2 MB. Free memory was 181.7 MB in the beginning and 168.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:07,272 INFO L168 Benchmark]: IcfgTransformer took 31.91 ms. Allocated memory is still 198.2 MB. Free memory was 168.7 MB in the beginning and 167.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:07,276 INFO L168 Benchmark]: TraceAbstraction took 399.52 ms. Allocated memory is still 198.2 MB. Free memory was 167.0 MB in the beginning and 136.2 MB in the end (delta: 30.8 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-05-06 05:37:07,278 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 198.2 MB. Free memory was 179.6 MB in the beginning and 179.5 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 174.26 ms. Allocated memory is still 198.2 MB. Free memory was 162.9 MB in the beginning and 153.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.14 ms. Allocated memory is still 198.2 MB. Free memory was 153.7 MB in the beginning and 181.7 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 324.73 ms. Allocated memory is still 198.2 MB. Free memory was 181.7 MB in the beginning and 168.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 31.91 ms. Allocated memory is still 198.2 MB. Free memory was 168.7 MB in the beginning and 167.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 399.52 ms. Allocated memory is still 198.2 MB. Free memory was 167.0 MB in the beginning and 136.2 MB in the end (delta: 30.8 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int x=0; VAL [\old(x)=53, x=0] [L26] COND TRUE 1 VAL [\old(x)=0, x=0] [L28] CALL eval() VAL [\old(x)=0, x=0] [L16] COND TRUE 1 [L17] x=1 VAL [\old(x)=0, x=1] [L28] RET eval() VAL [\old(x)=0, x=1] [L29] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L6] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L7] reach_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 327.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 10.1ms, AutomataDifference: 56.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 6 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.4ms SsaConstructionTime, 41.3ms SatisfiabilityAnalysisTime, 70.6ms InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 42 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...