/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/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 06:47:43,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 06:47:43,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 06:47:43,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 06:47:43,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 06:47:43,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 06:47:43,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 06:47:43,413 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 06:47:43,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 06:47:43,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 06:47:43,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 06:47:43,430 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 06:47:43,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 06:47:43,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 06:47:43,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 06:47:43,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 06:47:43,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 06:47:43,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 06:47:43,431 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 06:47:43,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 06:47:43,432 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 06:47:43,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 06:47:43,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 06:47:43,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 06:47:43,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 06:47:43,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 06:47:43,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:47:43,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 06:47:43,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 06:47:43,434 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 06:47:43,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 06:47:43,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 06:47:43,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 06:47:43,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 06:47:43,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 06:47:43,697 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 06:47:43,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2021-05-06 06:47:43,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5571a633/7786e9becfb64d82bd69c24f711b869b/FLAGcee735938 [2021-05-06 06:47:44,095 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 06:47:44,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c [2021-05-06 06:47:44,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5571a633/7786e9becfb64d82bd69c24f711b869b/FLAGcee735938 [2021-05-06 06:47:44,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5571a633/7786e9becfb64d82bd69c24f711b869b [2021-05-06 06:47:44,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 06:47:44,500 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 06:47:44,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 06:47:44,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 06:47:44,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 06:47:44,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:44,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3793b925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44, skipping insertion in model container [2021-05-06 06:47:44,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:44,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 06:47:44,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 06:47:44,625 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c[364,377] [2021-05-06 06:47:44,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:47:44,639 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 06:47:44,647 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c[364,377] [2021-05-06 06:47:44,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:47:44,667 INFO L208 MainTranslator]: Completed translation [2021-05-06 06:47:44,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44 WrapperNode [2021-05-06 06:47:44,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 06:47:44,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 06:47:44,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 06:47:44,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 06:47:44,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:44,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:44,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:44,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:44,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:44,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:44,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:44,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 06:47:44,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 06:47:44,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 06:47:44,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 06:47:44,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44" (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 06:47:44,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 06:47:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 06:47:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 06:47:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 06:47:44,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 06:47:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 06:47:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 06:47:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 06:47:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 06:47:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-06 06:47:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 06:47:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 06:47:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 06:47:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 06:47:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 06:47:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 06:47:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 06:47:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 06:47:44,993 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 06:47:44,994 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 06:47:44,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:47:44 BoogieIcfgContainer [2021-05-06 06:47:44,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 06:47:44,995 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 06:47:44,995 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 06:47:44,996 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 06:47:44,997 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:47:44" (1/1) ... [2021-05-06 06:47:45,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:47:45 BasicIcfg [2021-05-06 06:47:45,007 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 06:47:45,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 06:47:45,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 06:47:45,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 06:47:45,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 06:47:44" (1/4) ... [2021-05-06 06:47:45,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f9a42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:47:45, skipping insertion in model container [2021-05-06 06:47:45,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:47:44" (2/4) ... [2021-05-06 06:47:45,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f9a42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:47:45, skipping insertion in model container [2021-05-06 06:47:45,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:47:44" (3/4) ... [2021-05-06 06:47:45,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f9a42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:47:45, skipping insertion in model container [2021-05-06 06:47:45,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:47:45" (4/4) ... [2021-05-06 06:47:45,011 INFO L111 eAbstractionObserver]: Analyzing ICFG eq1.cJordan [2021-05-06 06:47:45,015 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 06:47:45,030 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 06:47:45,041 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 06:47:45,058 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 06:47:45,058 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 06:47:45,058 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 06:47:45,059 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 06:47:45,059 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 06:47:45,059 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 06:47:45,059 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 06:47:45,059 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 06:47:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 06:47:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 06:47:45,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:47:45,072 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:47:45,072 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:47:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:47:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2021-05-06 06:47:45,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:47:45,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806315278] [2021-05-06 06:47:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:47:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:47:45,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:47:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:47:45,309 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 06:47:45,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:47:45,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806315278] [2021-05-06 06:47:45,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806315278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:47:45,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:47:45,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 06:47:45,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977556081] [2021-05-06 06:47:45,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 06:47:45,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:47:45,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 06:47:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:47:45,328 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 06:47:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:47:45,377 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-05-06 06:47:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 06:47:45,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-06 06:47:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:47:45,385 INFO L225 Difference]: With dead ends: 20 [2021-05-06 06:47:45,385 INFO L226 Difference]: Without dead ends: 13 [2021-05-06 06:47:45,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:47:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-06 06:47:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-06 06:47:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 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 06:47:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-06 06:47:45,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-06 06:47:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:47:45,407 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-06 06:47:45,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 06:47:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-06 06:47:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 06:47:45,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:47:45,408 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:47:45,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 06:47:45,409 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:47:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:47:45,409 INFO L82 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2021-05-06 06:47:45,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:47:45,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148198602] [2021-05-06 06:47:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:47:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:47:45,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:47:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:47:45,551 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 06:47:45,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:47:45,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148198602] [2021-05-06 06:47:45,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148198602] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:47:45,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:47:45,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 06:47:45,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927756514] [2021-05-06 06:47:45,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 06:47:45,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:47:45,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 06:47:45,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 06:47:45,562 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 06:47:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:47:45,655 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2021-05-06 06:47:45,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 06:47:45,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-05-06 06:47:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:47:45,656 INFO L225 Difference]: With dead ends: 11 [2021-05-06 06:47:45,656 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 06:47:45,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 06:47:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 06:47:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 06:47:45,657 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) [2021-05-06 06:47:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 06:47:45,657 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-05-06 06:47:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:47:45,657 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 06:47:45,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 06:47:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 06:47:45,658 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 06:47:45,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 06:47:45,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:47:45 BasicIcfg [2021-05-06 06:47:45,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 06:47:45,662 INFO L168 Benchmark]: Toolchain (without parser) took 1161.27 ms. Allocated memory is still 186.6 MB. Free memory was 151.2 MB in the beginning and 148.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2021-05-06 06:47:45,662 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 186.6 MB. Free memory is still 167.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 06:47:45,662 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.20 ms. Allocated memory is still 186.6 MB. Free memory was 151.0 MB in the beginning and 141.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 06:47:45,663 INFO L168 Benchmark]: Boogie Preprocessor took 72.23 ms. Allocated memory is still 186.6 MB. Free memory was 141.5 MB in the beginning and 169.5 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-06 06:47:45,663 INFO L168 Benchmark]: RCFGBuilder took 252.21 ms. Allocated memory is still 186.6 MB. Free memory was 169.5 MB in the beginning and 156.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 06:47:45,663 INFO L168 Benchmark]: IcfgTransformer took 11.52 ms. Allocated memory is still 186.6 MB. Free memory was 155.9 MB in the beginning and 154.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 06:47:45,664 INFO L168 Benchmark]: TraceAbstraction took 653.26 ms. Allocated memory is still 186.6 MB. Free memory was 154.5 MB in the beginning and 148.5 MB in the end (delta: 5.9 MB). Peak memory consumption was 5.6 MB. Max. memory is 8.0 GB. [2021-05-06 06:47:45,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 186.6 MB. Free memory is still 167.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 163.20 ms. Allocated memory is still 186.6 MB. Free memory was 151.0 MB in the beginning and 141.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.23 ms. Allocated memory is still 186.6 MB. Free memory was 141.5 MB in the beginning and 169.5 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 252.21 ms. Allocated memory is still 186.6 MB. Free memory was 169.5 MB in the beginning and 156.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.52 ms. Allocated memory is still 186.6 MB. Free memory was 155.9 MB in the beginning and 154.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 653.26 ms. Allocated memory is still 186.6 MB. Free memory was 154.5 MB in the beginning and 148.5 MB in the end (delta: 5.9 MB). Peak memory consumption was 5.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 606.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.8ms, AutomataDifference: 165.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 18 SDslu, 19 SDs, 0 SdLazy, 23 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 150.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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: 11.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 23.5ms SsaConstructionTime, 82.1ms SatisfiabilityAnalysisTime, 210.4ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 98 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...