/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/for_infinite_loop_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 02:47:21,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 02:47:21,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 02:47:21,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 02:47:21,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-01 02:47:21,971 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 02:47:21,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 02:47:21,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 02:47:21,974 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 02:47:21,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 02:47:21,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 02:47:21,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 02:47:21,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 02:47:21,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 02:47:21,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 02:47:21,975 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 02:47:21,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 02:47:21,976 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 02:47:21,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 02:47:21,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 02:47:21,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 02:47:21,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 02:47:21,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 02:47:21,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 02:47:21,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 02:47:21,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-01 02:47:21,978 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-01 02:47:21,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 02:47:22,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 02:47:22,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 02:47:22,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 02:47:22,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 02:47:22,420 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 02:47:22,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_infinite_loop_1.c [2021-05-01 02:47:22,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8dcc3a03/3574a4fe3f3947c58a9512f65ef6baee/FLAG688caffc9 [2021-05-01 02:47:22,871 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 02:47:22,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_1.c [2021-05-01 02:47:22,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8dcc3a03/3574a4fe3f3947c58a9512f65ef6baee/FLAG688caffc9 [2021-05-01 02:47:22,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8dcc3a03/3574a4fe3f3947c58a9512f65ef6baee [2021-05-01 02:47:22,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 02:47:22,896 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-01 02:47:22,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 02:47:22,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 02:47:22,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 02:47:22,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a08c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:22, skipping insertion in model container [2021-05-01 02:47:22,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 02:47:22" (1/1) ... [2021-05-01 02:47:22,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 02:47:22,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 02:47:23,047 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_infinite_loop_1.c[418,431] [2021-05-01 02:47:23,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 02:47:23,063 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 02:47:23,086 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_infinite_loop_1.c[418,431] [2021-05-01 02:47:23,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 02:47:23,113 INFO L208 MainTranslator]: Completed translation [2021-05-01 02:47:23,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23 WrapperNode [2021-05-01 02:47:23,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 02:47:23,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 02:47:23,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 02:47:23,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 02:47:23,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23" (1/1) ... [2021-05-01 02:47:23,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23" (1/1) ... [2021-05-01 02:47:23,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23" (1/1) ... [2021-05-01 02:47:23,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23" (1/1) ... [2021-05-01 02:47:23,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23" (1/1) ... [2021-05-01 02:47:23,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23" (1/1) ... [2021-05-01 02:47:23,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23" (1/1) ... [2021-05-01 02:47:23,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 02:47:23,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 02:47:23,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 02:47:23,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 02:47:23,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23" (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 02:47:23,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 02:47:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 02:47:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 02:47:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 02:47:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 02:47:23,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 02:47:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 02:47:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 02:47:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 02:47:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 02:47:23,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 02:47:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 02:47:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 02:47:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 02:47:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 02:47:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 02:47:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 02:47:23,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 02:47:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 02:47:23,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 02:47:23,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 02:47:23,518 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 02:47:23,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 02:47:23 BoogieIcfgContainer [2021-05-01 02:47:23,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 02:47:23,523 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-01 02:47:23,523 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-01 02:47:23,528 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-01 02:47:23,530 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 02:47:23" (1/1) ... [2021-05-01 02:47:23,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 02:47:23 BasicIcfg [2021-05-01 02:47:23,545 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-01 02:47:23,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 02:47:23,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 02:47:23,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 02:47:23,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 02:47:22" (1/4) ... [2021-05-01 02:47:23,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59558f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 02:47:23, skipping insertion in model container [2021-05-01 02:47:23,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 02:47:23" (2/4) ... [2021-05-01 02:47:23,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59558f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 02:47:23, skipping insertion in model container [2021-05-01 02:47:23,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 02:47:23" (3/4) ... [2021-05-01 02:47:23,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59558f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 02:47:23, skipping insertion in model container [2021-05-01 02:47:23,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 02:47:23" (4/4) ... [2021-05-01 02:47:23,562 INFO L111 eAbstractionObserver]: Analyzing ICFG for_infinite_loop_1.cJordan [2021-05-01 02:47:23,579 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-01 02:47:23,582 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 02:47:23,595 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 02:47:23,624 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 02:47:23,624 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-01 02:47:23,624 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-01 02:47:23,624 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 02:47:23,624 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 02:47:23,624 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 02:47:23,624 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 02:47:23,624 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 02:47:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 02:47:23,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 02:47:23,670 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 02:47:23,670 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 02:47:23,670 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 02:47:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 02:47:23,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1508123324, now seen corresponding path program 1 times [2021-05-01 02:47:23,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 02:47:23,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27908780] [2021-05-01 02:47:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 02:47:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:23,844 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,845 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 02:47:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:23,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:23,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:23,915 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 02:47:23,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 02:47:23,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27908780] [2021-05-01 02:47:23,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27908780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 02:47:23,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 02:47:23,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 02:47:23,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566180186] [2021-05-01 02:47:23,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 02:47:23,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 02:47:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 02:47:23,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 02:47:23,931 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2021-05-01 02:47:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 02:47:23,961 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-01 02:47:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 02:47:23,963 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 [2021-05-01 02:47:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 02:47:23,967 INFO L225 Difference]: With dead ends: 20 [2021-05-01 02:47:23,967 INFO L226 Difference]: Without dead ends: 16 [2021-05-01 02:47:23,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 02:47:23,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-01 02:47:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-01 02:47:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 02:47:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-01 02:47:23,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2021-05-01 02:47:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 02:47:23,987 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-01 02:47:23,987 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) [2021-05-01 02:47:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-01 02:47:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 02:47:23,988 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 02:47:23,988 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 02:47:23,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 02:47:23,988 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 02:47:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 02:47:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1510000157, now seen corresponding path program 1 times [2021-05-01 02:47:23,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 02:47:23,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809291737] [2021-05-01 02:47:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 02:47:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:24,083 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:24,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:24,085 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:24,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 02:47:24,088 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:24,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 02:47:24,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:24,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 02:47:24,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:24,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:24,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 02:47:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 02:47:24,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 02:47:24,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 02:47:24,137 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 02:47:24,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 02:47:24,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809291737] [2021-05-01 02:47:24,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809291737] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 02:47:24,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 02:47:24,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 02:47:24,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929361859] [2021-05-01 02:47:24,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 02:47:24,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 02:47:24,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 02:47:24,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 02:47:24,141 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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) [2021-05-01 02:47:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 02:47:24,244 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-05-01 02:47:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-01 02:47:24,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 [2021-05-01 02:47:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 02:47:24,245 INFO L225 Difference]: With dead ends: 14 [2021-05-01 02:47:24,246 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 02:47:24,248 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-01 02:47:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 02:47:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 02:47:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-01 02:47:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 02:47:24,253 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-05-01 02:47:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 02:47:24,253 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 02:47:24,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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) [2021-05-01 02:47:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 02:47:24,254 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 02:47:24,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 02:47:24,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 02:47:24 BasicIcfg [2021-05-01 02:47:24,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 02:47:24,258 INFO L168 Benchmark]: Toolchain (without parser) took 1361.77 ms. Allocated memory is still 176.2 MB. Free memory was 140.6 MB in the beginning and 85.7 MB in the end (delta: 54.9 MB). Peak memory consumption was 53.1 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,259 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 176.2 MB. Free memory is still 157.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 02:47:24,259 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.30 ms. Allocated memory is still 176.2 MB. Free memory was 140.5 MB in the beginning and 159.1 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.1 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,260 INFO L168 Benchmark]: Boogie Preprocessor took 39.70 ms. Allocated memory is still 176.2 MB. Free memory was 159.1 MB in the beginning and 157.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,260 INFO L168 Benchmark]: RCFGBuilder took 365.08 ms. Allocated memory is still 176.2 MB. Free memory was 157.5 MB in the beginning and 143.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,261 INFO L168 Benchmark]: IcfgTransformer took 22.24 ms. Allocated memory is still 176.2 MB. Free memory was 143.4 MB in the beginning and 142.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,263 INFO L168 Benchmark]: TraceAbstraction took 711.23 ms. Allocated memory is still 176.2 MB. Free memory was 141.8 MB in the beginning and 85.7 MB in the end (delta: 56.1 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. [2021-05-01 02:47:24,267 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 176.2 MB. Free memory is still 157.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 216.30 ms. Allocated memory is still 176.2 MB. Free memory was 140.5 MB in the beginning and 159.1 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.70 ms. Allocated memory is still 176.2 MB. Free memory was 159.1 MB in the beginning and 157.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 365.08 ms. Allocated memory is still 176.2 MB. Free memory was 157.5 MB in the beginning and 143.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 22.24 ms. Allocated memory is still 176.2 MB. Free memory was 143.4 MB in the beginning and 142.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 711.23 ms. Allocated memory is still 176.2 MB. Free memory was 141.8 MB in the beginning and 85.7 MB in the end (delta: 56.1 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 632.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 20.0ms, AutomataDifference: 155.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28 SDtfs, 24 SDslu, 19 SDs, 0 SdLazy, 25 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 137.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 14.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.6ms SsaConstructionTime, 63.6ms SatisfiabilityAnalysisTime, 222.0ms InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 94 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...