/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/terminator_02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 06:53:39,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 06:53:39,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 06:53:39,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 06:53:39,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 06:53:39,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 06:53:39,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 06:53:39,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 06:53:39,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 06:53:39,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 06:53:39,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 06:53:39,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 06:53:39,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 06:53:39,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 06:53:39,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 06:53:39,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 06:53:39,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 06:53:39,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 06:53:39,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 06:53:39,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 06:53:39,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 06:53:39,235 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 06:53:39,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 06:53:39,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 06:53:39,237 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 06:53:39,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 06:53:39,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 06:53:39,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 06:53:39,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 06:53:39,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 06:53:39,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 06:53:39,238 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 06:53:39,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 06:53:39,238 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 06:53:39,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 06:53:39,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 06:53:39,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 06:53:39,239 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 06:53:39,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 06:53:39,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 06:53:39,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 06:53:39,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 06:53:39,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 06:53:39,240 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 06:53:39,240 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 06:53:39,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 06:53:39,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 06:53:39,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 06:53:39,546 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 06:53:39,546 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 06:53:39,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_02-1.c [2021-05-01 06:53:39,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffefbabe1/7e599563c3174cab87a38ccd0441fe6e/FLAG32089cb46 [2021-05-01 06:53:39,909 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 06:53:39,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_02-1.c [2021-05-01 06:53:39,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffefbabe1/7e599563c3174cab87a38ccd0441fe6e/FLAG32089cb46 [2021-05-01 06:53:40,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffefbabe1/7e599563c3174cab87a38ccd0441fe6e [2021-05-01 06:53:40,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 06:53:40,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 06:53:40,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 06:53:40,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 06:53:40,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 06:53:40,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:53:40" (1/1) ... [2021-05-01 06:53:40,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6927b34e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40, skipping insertion in model container [2021-05-01 06:53:40,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:53:40" (1/1) ... [2021-05-01 06:53:40,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 06:53:40,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 06:53:40,471 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/terminator_02-1.c[327,340] [2021-05-01 06:53:40,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:53:40,497 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 06:53:40,505 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/terminator_02-1.c[327,340] [2021-05-01 06:53:40,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:53:40,519 INFO L208 MainTranslator]: Completed translation [2021-05-01 06:53:40,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40 WrapperNode [2021-05-01 06:53:40,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 06:53:40,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 06:53:40,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 06:53:40,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 06:53:40,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40" (1/1) ... [2021-05-01 06:53:40,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40" (1/1) ... [2021-05-01 06:53:40,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40" (1/1) ... [2021-05-01 06:53:40,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40" (1/1) ... [2021-05-01 06:53:40,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40" (1/1) ... [2021-05-01 06:53:40,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40" (1/1) ... [2021-05-01 06:53:40,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40" (1/1) ... [2021-05-01 06:53:40,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 06:53:40,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 06:53:40,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 06:53:40,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 06:53:40,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40" (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 06:53:40,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 06:53:40,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 06:53:40,675 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 06:53:40,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 06:53:40,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 06:53:40,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 06:53:40,675 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 06:53:40,676 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 06:53:40,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 06:53:40,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 06:53:40,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 06:53:40,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-01 06:53:40,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 06:53:40,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 06:53:40,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 06:53:40,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 06:53:40,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 06:53:40,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 06:53:40,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 06:53:40,881 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 06:53:40,881 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 06:53:40,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:53:40 BoogieIcfgContainer [2021-05-01 06:53:40,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 06:53:40,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 06:53:40,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 06:53:40,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 06:53:40,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 06:53:40" (1/3) ... [2021-05-01 06:53:40,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ebeaa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:53:40, skipping insertion in model container [2021-05-01 06:53:40,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:53:40" (2/3) ... [2021-05-01 06:53:40,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ebeaa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:53:40, skipping insertion in model container [2021-05-01 06:53:40,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:53:40" (3/3) ... [2021-05-01 06:53:40,889 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_02-1.c [2021-05-01 06:53:40,893 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 06:53:40,898 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 06:53:40,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 06:53:40,932 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 06:53:40,932 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 06:53:40,932 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 06:53:40,932 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 06:53:40,932 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 06:53:40,932 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 06:53:40,932 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 06:53:40,933 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 06:53:40,943 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) [2021-05-01 06:53:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 06:53:40,958 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:53:40,959 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:53:40,959 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:53:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:53:40,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1706373939, now seen corresponding path program 1 times [2021-05-01 06:53:40,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:53:40,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722315301] [2021-05-01 06:53:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:53:41,033 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:53:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:53:41,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:53:41,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:53:41,145 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:53:41,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:53:41,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:53:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:53:41,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:53:41,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:53:41,216 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 06:53:41,218 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:53:41,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722315301] [2021-05-01 06:53:41,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1722315301] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:53:41,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:53:41,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 06:53:41,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208095034] [2021-05-01 06:53:41,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 06:53:41,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:53:41,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 06:53:41,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 06:53:41,236 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) [2021-05-01 06:53:41,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:53:41,307 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-01 06:53:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 06:53:41,309 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 [2021-05-01 06:53:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:53:41,313 INFO L225 Difference]: With dead ends: 32 [2021-05-01 06:53:41,313 INFO L226 Difference]: Without dead ends: 13 [2021-05-01 06:53:41,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 06:53:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-01 06:53:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-01 06:53:41,343 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) [2021-05-01 06:53:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-01 06:53:41,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-01 06:53:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:53:41,346 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-01 06:53:41,346 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) [2021-05-01 06:53:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-01 06:53:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 06:53:41,347 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:53:41,347 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:53:41,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 06:53:41,347 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:53:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:53:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1697138729, now seen corresponding path program 1 times [2021-05-01 06:53:41,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:53:41,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251747353] [2021-05-01 06:53:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:53:41,357 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:53:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 06:53:41,388 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 06:53:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 06:53:41,423 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 06:53:41,447 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-01 06:53:41,447 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 06:53:41,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 06:53:41,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 06:53:41 BoogieIcfgContainer [2021-05-01 06:53:41,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 06:53:41,461 INFO L168 Benchmark]: Toolchain (without parser) took 1097.07 ms. Allocated memory is still 185.6 MB. Free memory was 151.4 MB in the beginning and 124.1 MB in the end (delta: 27.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. [2021-05-01 06:53:41,462 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 185.6 MB. Free memory is still 167.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 06:53:41,463 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.84 ms. Allocated memory is still 185.6 MB. Free memory was 151.3 MB in the beginning and 141.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 06:53:41,464 INFO L168 Benchmark]: Boogie Preprocessor took 40.00 ms. Allocated memory is still 185.6 MB. Free memory was 141.8 MB in the beginning and 140.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 06:53:41,465 INFO L168 Benchmark]: RCFGBuilder took 320.55 ms. Allocated memory is still 185.6 MB. Free memory was 140.4 MB in the beginning and 155.6 MB in the end (delta: -15.2 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. [2021-05-01 06:53:41,466 INFO L168 Benchmark]: TraceAbstraction took 576.09 ms. Allocated memory is still 185.6 MB. Free memory was 155.6 MB in the beginning and 124.1 MB in the end (delta: 31.4 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2021-05-01 06:53:41,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 185.6 MB. Free memory is still 167.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 154.84 ms. Allocated memory is still 185.6 MB. Free memory was 151.3 MB in the beginning and 141.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.00 ms. Allocated memory is still 185.6 MB. Free memory was 141.8 MB in the beginning and 140.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 320.55 ms. Allocated memory is still 185.6 MB. Free memory was 140.4 MB in the beginning and 155.6 MB in the end (delta: -15.2 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 576.09 ms. Allocated memory is still 185.6 MB. Free memory was 155.6 MB in the beginning and 124.1 MB in the end (delta: 31.4 MB). Peak memory consumption was 31.5 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: [L16] int x=__VERIFIER_nondet_int(); [L17] int y=__VERIFIER_nondet_int(); [L18] int z=__VERIFIER_nondet_int(); [L20] COND FALSE !(x<100 && 100