/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/terminator_02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-15 23:06:26,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 23:06:26,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 23:06:26,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 23:06:26,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 23:06:26,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 23:06:26,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 23:06:26,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 23:06:26,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 23:06:26,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 23:06:26,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 23:06:26,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 23:06:26,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 23:06:26,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 23:06:26,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 23:06:26,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 23:06:26,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 23:06:26,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 23:06:26,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 23:06:26,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 23:06:26,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-04-15 23:06:26,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 23:06:26,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 23:06:26,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 23:06:26,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 23:06:26,304 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 23:06:26,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 23:06:26,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 23:06:26,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 23:06:26,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 23:06:26,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 23:06:26,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 23:06:26,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 23:06:26,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 23:06:26,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 23:06:26,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 23:06:26,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 23:06:26,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 23:06:26,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 23:06:26,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 23:06:26,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 23:06:26,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 23:06:26,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 23:06:26,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 23:06:26,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 23:06:26,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 23:06:26,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 23:06:26,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 23:06:26,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-04-15 23:06:26,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 23:06:26,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 23:06:26,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 23:06:26,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 23:06:26,733 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-15 23:06:26,734 INFO L275 PluginConnector]: CDTParser initialized [2021-04-15 23:06:26,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_02-1.c [2021-04-15 23:06:26,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81dc719b5/78c74d4e776d4c54a8525e2b3f727715/FLAG4122ead0b [2021-04-15 23:06:27,649 INFO L306 CDTParser]: Found 1 translation units. [2021-04-15 23:06:27,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_02-1.c [2021-04-15 23:06:27,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81dc719b5/78c74d4e776d4c54a8525e2b3f727715/FLAG4122ead0b [2021-04-15 23:06:27,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81dc719b5/78c74d4e776d4c54a8525e2b3f727715 [2021-04-15 23:06:27,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 23:06:27,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 23:06:27,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-15 23:06:27,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-15 23:06:27,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-15 23:06:27,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 11:06:27" (1/1) ... [2021-04-15 23:06:27,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3adb1dce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:27, skipping insertion in model container [2021-04-15 23:06:27,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 11:06:27" (1/1) ... [2021-04-15 23:06:27,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-15 23:06:27,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-15 23:06:28,020 WARN L226 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] [2021-04-15 23:06:28,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 23:06:28,047 INFO L203 MainTranslator]: Completed pre-run [2021-04-15 23:06:28,062 WARN L226 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] [2021-04-15 23:06:28,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 23:06:28,143 INFO L208 MainTranslator]: Completed translation [2021-04-15 23:06:28,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28 WrapperNode [2021-04-15 23:06:28,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-15 23:06:28,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 23:06:28,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 23:06:28,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 23:06:28,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28" (1/1) ... [2021-04-15 23:06:28,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28" (1/1) ... [2021-04-15 23:06:28,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28" (1/1) ... [2021-04-15 23:06:28,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28" (1/1) ... [2021-04-15 23:06:28,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28" (1/1) ... [2021-04-15 23:06:28,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28" (1/1) ... [2021-04-15 23:06:28,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28" (1/1) ... [2021-04-15 23:06:28,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 23:06:28,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 23:06:28,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 23:06:28,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 23:06:28,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28" (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 [2021-04-15 23:06:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-15 23:06:28,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 23:06:28,286 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-15 23:06:28,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-15 23:06:28,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-15 23:06:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-15 23:06:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-15 23:06:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-15 23:06:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-15 23:06:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-15 23:06:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-15 23:06:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-04-15 23:06:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-15 23:06:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-15 23:06:28,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-15 23:06:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 23:06:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-15 23:06:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-15 23:06:28,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-15 23:06:28,598 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 23:06:28,598 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-15 23:06:28,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 11:06:28 BoogieIcfgContainer [2021-04-15 23:06:28,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 23:06:28,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 23:06:28,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 23:06:28,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 23:06:28,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 11:06:27" (1/3) ... [2021-04-15 23:06:28,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebd4928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 11:06:28, skipping insertion in model container [2021-04-15 23:06:28,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:06:28" (2/3) ... [2021-04-15 23:06:28,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebd4928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 11:06:28, skipping insertion in model container [2021-04-15 23:06:28,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 11:06:28" (3/3) ... [2021-04-15 23:06:28,624 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_02-1.c [2021-04-15 23:06:28,629 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 23:06:28,633 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 23:06:28,666 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-15 23:06:28,704 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 23:06:28,704 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 23:06:28,704 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 23:06:28,704 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 23:06:28,705 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 23:06:28,705 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 23:06:28,705 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 23:06:28,705 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 23:06:28,744 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) [2021-04-15 23:06:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 23:06:28,748 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:06:28,749 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:06:28,749 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:06:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:06:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1706373939, now seen corresponding path program 1 times [2021-04-15 23:06:28,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:06:28,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755420525] [2021-04-15 23:06:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:06:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:06:28,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:06:28,956 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:06:28,956 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:06:28,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:06:28,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 23:06:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:06:29,006 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:06:29,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:06:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 23:06:29,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755420525] [2021-04-15 23:06:29,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 23:06:29,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 23:06:29,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096246742] [2021-04-15 23:06:29,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 23:06:29,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 23:06:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 23:06:29,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 23:06:29,034 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) [2021-04-15 23:06:29,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 23:06:29,096 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-04-15 23:06:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 23:06:29,098 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 [2021-04-15 23:06:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 23:06:29,103 INFO L225 Difference]: With dead ends: 32 [2021-04-15 23:06:29,103 INFO L226 Difference]: Without dead ends: 13 [2021-04-15 23:06:29,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 23:06:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-04-15 23:06:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-04-15 23:06:29,147 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) [2021-04-15 23:06:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-04-15 23:06:29,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-04-15 23:06:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 23:06:29,150 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-04-15 23:06:29,151 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) [2021-04-15 23:06:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-04-15 23:06:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 23:06:29,153 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:06:29,153 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:06:29,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 23:06:29,153 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:06:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:06:29,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1697138729, now seen corresponding path program 1 times [2021-04-15 23:06:29,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:06:29,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055776164] [2021-04-15 23:06:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:06:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 23:06:29,199 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 23:06:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-15 23:06:29,221 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-15 23:06:29,252 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-15 23:06:29,252 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-15 23:06:29,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 23:06:29,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 11:06:29 BoogieIcfgContainer [2021-04-15 23:06:29,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 23:06:29,274 INFO L168 Benchmark]: Toolchain (without parser) took 1433.16 ms. Allocated memory is still 186.6 MB. Free memory was 152.1 MB in the beginning and 124.6 MB in the end (delta: 27.5 MB). Peak memory consumption was 28.4 MB. Max. memory is 8.0 GB. [2021-04-15 23:06:29,274 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 186.6 MB. Free memory was 168.8 MB in the beginning and 168.7 MB in the end (delta: 131.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-15 23:06:29,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.89 ms. Allocated memory is still 186.6 MB. Free memory was 151.8 MB in the beginning and 170.4 MB in the end (delta: -18.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. [2021-04-15 23:06:29,276 INFO L168 Benchmark]: Boogie Preprocessor took 59.35 ms. Allocated memory is still 186.6 MB. Free memory was 170.4 MB in the beginning and 169.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-04-15 23:06:29,276 INFO L168 Benchmark]: RCFGBuilder took 393.31 ms. Allocated memory is still 186.6 MB. Free memory was 169.2 MB in the beginning and 154.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-04-15 23:06:29,277 INFO L168 Benchmark]: TraceAbstraction took 671.08 ms. Allocated memory is still 186.6 MB. Free memory was 154.5 MB in the beginning and 124.6 MB in the end (delta: 29.9 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-04-15 23:06:29,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 186.6 MB. Free memory was 168.8 MB in the beginning and 168.7 MB in the end (delta: 131.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 299.89 ms. Allocated memory is still 186.6 MB. Free memory was 151.8 MB in the beginning and 170.4 MB in the end (delta: -18.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.35 ms. Allocated memory is still 186.6 MB. Free memory was 170.4 MB in the beginning and 169.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 393.31 ms. Allocated memory is still 186.6 MB. Free memory was 169.2 MB in the beginning and 154.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 671.08 ms. Allocated memory is still 186.6 MB. Free memory was 154.5 MB in the beginning and 124.6 MB in the end (delta: 29.9 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int x=__VERIFIER_nondet_int(); [L17] int y=__VERIFIER_nondet_int(); [L18] int z=__VERIFIER_nondet_int(); [L20] COND FALSE !(x<100 && 100