/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -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-1a84f73 [2021-05-01 03:01:50,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 03:01:50,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 03:01:50,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 03:01:50,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-01 03:01:50,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 03:01:50,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 03:01:50,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 03:01:50,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 03:01:50,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 03:01:50,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 03:01:50,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 03:01:50,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 03:01:50,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 03:01:50,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 03:01:50,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 03:01:50,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 03:01:50,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 03:01:50,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 03:01:50,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 03:01:50,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 03:01:50,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 03:01:50,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 03:01:50,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 03:01:50,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 03:01:50,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-01 03:01:50,948 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-01 03:01:50,949 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 03:01:51,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 03:01:51,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 03:01:51,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 03:01:51,368 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 03:01:51,370 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 03:01:51,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-05-01 03:01:51,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b050e9815/2cbc84ac1aea478e88aeef1184cea2ef/FLAG98b5fce90 [2021-05-01 03:01:52,044 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 03:01:52,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-05-01 03:01:52,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b050e9815/2cbc84ac1aea478e88aeef1184cea2ef/FLAG98b5fce90 [2021-05-01 03:01:52,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b050e9815/2cbc84ac1aea478e88aeef1184cea2ef [2021-05-01 03:01:52,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 03:01:52,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-01 03:01:52,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 03:01:52,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 03:01:52,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 03:01:52,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 03:01:52" (1/1) ... [2021-05-01 03:01:52,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@668d38a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52, skipping insertion in model container [2021-05-01 03:01:52,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 03:01:52" (1/1) ... [2021-05-01 03:01:52,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 03:01:52,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 03:01:52,648 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] [2021-05-01 03:01:52,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 03:01:52,669 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 03:01:52,680 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] [2021-05-01 03:01:52,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 03:01:52,718 INFO L208 MainTranslator]: Completed translation [2021-05-01 03:01:52,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52 WrapperNode [2021-05-01 03:01:52,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 03:01:52,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 03:01:52,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 03:01:52,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 03:01:52,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52" (1/1) ... [2021-05-01 03:01:52,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52" (1/1) ... [2021-05-01 03:01:52,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52" (1/1) ... [2021-05-01 03:01:52,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52" (1/1) ... [2021-05-01 03:01:52,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52" (1/1) ... [2021-05-01 03:01:52,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52" (1/1) ... [2021-05-01 03:01:52,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52" (1/1) ... [2021-05-01 03:01:52,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 03:01:52,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 03:01:52,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 03:01:52,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 03:01:52,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52" (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 [2021-05-01 03:01:52,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 03:01:52,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 03:01:52,874 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 03:01:52,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 03:01:52,875 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2021-05-01 03:01:52,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 03:01:52,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 03:01:52,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 03:01:52,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 03:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 03:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 03:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2021-05-01 03:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 03:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 03:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 03:01:52,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 03:01:52,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 03:01:52,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 03:01:52,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 03:01:53,181 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 03:01:53,181 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 03:01:53,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 03:01:53 BoogieIcfgContainer [2021-05-01 03:01:53,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 03:01:53,201 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-01 03:01:53,201 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-01 03:01:53,202 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-01 03:01:53,205 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 03:01:53" (1/1) ... [2021-05-01 03:01:53,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 03:01:53 BasicIcfg [2021-05-01 03:01:53,248 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-01 03:01:53,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 03:01:53,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 03:01:53,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 03:01:53,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 03:01:52" (1/4) ... [2021-05-01 03:01:53,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ef60ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 03:01:53, skipping insertion in model container [2021-05-01 03:01:53,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 03:01:52" (2/4) ... [2021-05-01 03:01:53,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ef60ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 03:01:53, skipping insertion in model container [2021-05-01 03:01:53,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 03:01:53" (3/4) ... [2021-05-01 03:01:53,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ef60ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 03:01:53, skipping insertion in model container [2021-05-01 03:01:53,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 03:01:53" (4/4) ... [2021-05-01 03:01:53,259 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.cJordan [2021-05-01 03:01:53,270 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-01 03:01:53,278 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 03:01:53,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 03:01:53,334 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 03:01:53,334 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-01 03:01:53,334 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-01 03:01:53,334 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 03:01:53,334 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 03:01:53,334 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 03:01:53,335 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 03:01:53,335 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 03:01:53,360 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) [2021-05-01 03:01:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-01 03:01:53,376 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:01:53,377 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:01:53,378 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:01:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:01:53,384 INFO L82 PathProgramCache]: Analyzing trace with hash -459487812, now seen corresponding path program 1 times [2021-05-01 03:01:53,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:01:53,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609620341] [2021-05-01 03:01:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:01:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:01:53,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:53,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:01:53,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:53,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:01:53,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 03:01:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 03:01:53,760 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 03:01:53,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 03:01:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 03:01:53,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 03:01:53,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609620341] [2021-05-01 03:01:53,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609620341] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 03:01:53,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 03:01:53,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 03:01:53,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823900047] [2021-05-01 03:01:53,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 03:01:53,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 03:01:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 03:01:53,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 03:01:53,799 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) [2021-05-01 03:01:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 03:01:53,889 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-05-01 03:01:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 03:01:53,891 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 [2021-05-01 03:01:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 03:01:53,906 INFO L225 Difference]: With dead ends: 19 [2021-05-01 03:01:53,906 INFO L226 Difference]: Without dead ends: 19 [2021-05-01 03:01:53,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 03:01:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-01 03:01:53,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-05-01 03:01:53,942 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) [2021-05-01 03:01:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-01 03:01:53,944 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2021-05-01 03:01:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 03:01:53,945 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-01 03:01:53,946 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) [2021-05-01 03:01:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-01 03:01:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 03:01:53,947 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 03:01:53,948 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 03:01:53,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 03:01:53,949 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 03:01:53,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 03:01:53,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2132896698, now seen corresponding path program 1 times [2021-05-01 03:01:53,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 03:01:53,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390122000] [2021-05-01 03:01:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 03:01:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 03:01:53,990 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 03:01:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 03:01:54,021 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 03:01:54,054 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-01 03:01:54,055 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 03:01:54,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 03:01:54,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 03:01:54 BasicIcfg [2021-05-01 03:01:54,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 03:01:54,097 INFO L168 Benchmark]: Toolchain (without parser) took 1667.20 ms. Allocated memory is still 305.1 MB. Free memory was 269.9 MB in the beginning and 240.0 MB in the end (delta: 29.9 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:54,097 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 305.1 MB. Free memory is still 286.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 03:01:54,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.12 ms. Allocated memory is still 305.1 MB. Free memory was 269.8 MB in the beginning and 289.3 MB in the end (delta: -19.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:54,098 INFO L168 Benchmark]: Boogie Preprocessor took 66.79 ms. Allocated memory is still 305.1 MB. Free memory was 289.3 MB in the beginning and 287.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:54,099 INFO L168 Benchmark]: RCFGBuilder took 396.06 ms. Allocated memory is still 305.1 MB. Free memory was 287.7 MB in the beginning and 274.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:54,099 INFO L168 Benchmark]: IcfgTransformer took 46.93 ms. Allocated memory is still 305.1 MB. Free memory was 274.1 MB in the beginning and 272.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:54,100 INFO L168 Benchmark]: TraceAbstraction took 845.25 ms. Allocated memory is still 305.1 MB. Free memory was 272.5 MB in the beginning and 240.0 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-05-01 03:01:54,102 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 305.1 MB. Free memory is still 286.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.12 ms. Allocated memory is still 305.1 MB. Free memory was 269.8 MB in the beginning and 289.3 MB in the end (delta: -19.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.79 ms. Allocated memory is still 305.1 MB. Free memory was 289.3 MB in the beginning and 287.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 396.06 ms. Allocated memory is still 305.1 MB. Free memory was 287.7 MB in the beginning and 274.1 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 46.93 ms. Allocated memory is still 305.1 MB. Free memory was 274.1 MB in the beginning and 272.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 845.25 ms. Allocated memory is still 305.1 MB. Free memory was 272.5 MB in the beginning and 240.0 MB in the end (delta: 32.5 MB). Peak memory consumption was 32.5 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: 726.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 26.5ms, AutomataDifference: 129.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 6 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.3ms 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: 22.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 28.4ms SsaConstructionTime, 73.5ms SatisfiabilityAnalysisTime, 240.0ms 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...