/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/ldv-regression/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:38:01,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:38:01,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:38:01,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:38:01,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:38:01,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:38:01,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:38:01,568 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 [2021-02-23 13:38:01,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:38:01,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:38:01,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:38:01,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:38:01,624 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:38:01,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:38:01,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:38:01,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:38:01,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:38:01,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:38:01,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:38:01,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:38:01,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:38:01,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:38:01,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:38:01,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:38:01,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:38:01,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:38:01,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:38:01,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:38:01,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:38:01,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:38:01,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:38:01,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:38:01,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:38:01,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:38:01,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:38:01,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:38:01,630 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:38:02,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:38:02,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:38:02,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:38:02,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:38:02,064 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:38:02,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2021-02-23 13:38:02,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e7f903bb/59a85c1921b24b508e7c45b78e2fa059/FLAG1f4c4a638 [2021-02-23 13:38:02,719 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:38:02,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2021-02-23 13:38:02,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e7f903bb/59a85c1921b24b508e7c45b78e2fa059/FLAG1f4c4a638 [2021-02-23 13:38:03,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e7f903bb/59a85c1921b24b508e7c45b78e2fa059 [2021-02-23 13:38:03,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:38:03,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:38:03,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:38:03,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:38:03,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:38:03,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:38:03" (1/1) ... [2021-02-23 13:38:03,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c3b06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03, skipping insertion in model container [2021-02-23 13:38:03,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:38:03" (1/1) ... [2021-02-23 13:38:03,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:38:03,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:38:03,377 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c[576,589] [2021-02-23 13:38:03,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:38:03,390 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:38:03,407 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c[576,589] [2021-02-23 13:38:03,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:38:03,423 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:38:03,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03 WrapperNode [2021-02-23 13:38:03,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:38:03,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:38:03,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:38:03,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:38:03,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03" (1/1) ... [2021-02-23 13:38:03,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03" (1/1) ... [2021-02-23 13:38:03,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03" (1/1) ... [2021-02-23 13:38:03,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03" (1/1) ... [2021-02-23 13:38:03,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03" (1/1) ... [2021-02-23 13:38:03,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03" (1/1) ... [2021-02-23 13:38:03,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03" (1/1) ... [2021-02-23 13:38:03,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:38:03,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:38:03,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:38:03,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:38:03,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03" (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 [2021-02-23 13:38:03,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:38:03,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:38:03,554 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:38:03,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:38:03,554 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:38:03,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:38:03,555 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:38:03,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:38:03,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:38:03,555 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:38:03,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:38:03,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:38:03,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:38:03,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:38:03,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:38:03,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:38:03,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:38:03,787 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 13:38:03,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:38:03 BoogieIcfgContainer [2021-02-23 13:38:03,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:38:03,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:38:03,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:38:03,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:38:03,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:38:03" (1/3) ... [2021-02-23 13:38:03,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39478489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:38:03, skipping insertion in model container [2021-02-23 13:38:03,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:38:03" (2/3) ... [2021-02-23 13:38:03,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39478489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:38:03, skipping insertion in model container [2021-02-23 13:38:03,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:38:03" (3/3) ... [2021-02-23 13:38:03,797 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2021-02-23 13:38:03,833 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:38:03,840 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:38:03,859 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:38:03,892 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:38:03,893 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:38:03,893 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:38:03,893 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:38:03,893 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:38:03,893 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:38:03,893 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:38:03,894 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:38:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-02-23 13:38:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-23 13:38:03,914 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:38:03,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:38:03,915 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:38:03,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:38:03,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1943681295, now seen corresponding path program 1 times [2021-02-23 13:38:03,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:38:03,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944345473] [2021-02-23 13:38:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:38:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:38:04,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:38:04,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:38:04,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:38:04,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:38:04,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:38:04,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:38:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:38:04,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:38:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:38:04,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944345473] [2021-02-23 13:38:04,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:38:04,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:38:04,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518839653] [2021-02-23 13:38:04,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:38:04,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:38:04,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:38:04,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:38:04,304 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2021-02-23 13:38:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:38:04,426 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-02-23 13:38:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:38:04,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2021-02-23 13:38:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:38:04,438 INFO L225 Difference]: With dead ends: 34 [2021-02-23 13:38:04,438 INFO L226 Difference]: Without dead ends: 21 [2021-02-23 13:38:04,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-23 13:38:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-02-23 13:38:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-02-23 13:38:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-02-23 13:38:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-02-23 13:38:04,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2021-02-23 13:38:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:38:04,480 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-02-23 13:38:04,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:38:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-02-23 13:38:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-23 13:38:04,481 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:38:04,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:38:04,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:38:04,481 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:38:04,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:38:04,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1941834253, now seen corresponding path program 1 times [2021-02-23 13:38:04,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:38:04,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156587225] [2021-02-23 13:38:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:38:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:38:04,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:38:04,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:38:04,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:38:04,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:38:04,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:38:04,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 13:38:04,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:38:04,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:38:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:38:04,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:38:04,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:38:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:38:04,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156587225] [2021-02-23 13:38:04,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:38:04,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 13:38:04,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336910979] [2021-02-23 13:38:04,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 13:38:04,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:38:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 13:38:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 13:38:04,621 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2021-02-23 13:38:04,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:38:04,732 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-02-23 13:38:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 13:38:04,732 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-02-23 13:38:04,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:38:04,733 INFO L225 Difference]: With dead ends: 23 [2021-02-23 13:38:04,733 INFO L226 Difference]: Without dead ends: 14 [2021-02-23 13:38:04,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-23 13:38:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-02-23 13:38:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-02-23 13:38:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-02-23 13:38:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2021-02-23 13:38:04,741 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2021-02-23 13:38:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:38:04,741 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2021-02-23 13:38:04,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 13:38:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2021-02-23 13:38:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-23 13:38:04,742 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:38:04,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:38:04,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:38:04,743 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:38:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:38:04,744 INFO L82 PathProgramCache]: Analyzing trace with hash -168673933, now seen corresponding path program 1 times [2021-02-23 13:38:04,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:38:04,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386862906] [2021-02-23 13:38:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:38:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:38:04,777 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:38:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:38:04,826 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:38:04,873 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:38:04,873 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:38:04,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:38:04,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:38:04 BoogieIcfgContainer [2021-02-23 13:38:04,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:38:04,921 INFO L168 Benchmark]: Toolchain (without parser) took 1799.57 ms. Allocated memory is still 162.5 MB. Free memory was 136.7 MB in the beginning and 73.5 MB in the end (delta: 63.2 MB). Peak memory consumption was 64.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:38:04,922 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory was 134.4 MB in the beginning and 134.3 MB in the end (delta: 99.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:38:04,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.52 ms. Allocated memory is still 162.5 MB. Free memory was 135.4 MB in the beginning and 125.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:38:04,924 INFO L168 Benchmark]: Boogie Preprocessor took 33.78 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 124.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:38:04,924 INFO L168 Benchmark]: RCFGBuilder took 329.07 ms. Allocated memory is still 162.5 MB. Free memory was 124.5 MB in the beginning and 110.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 13:38:04,925 INFO L168 Benchmark]: TraceAbstraction took 1128.51 ms. Allocated memory is still 162.5 MB. Free memory was 110.3 MB in the beginning and 73.5 MB in the end (delta: 36.8 MB). Peak memory consumption was 37.9 MB. Max. memory is 8.0 GB. [2021-02-23 13:38:04,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory was 134.4 MB in the beginning and 134.3 MB in the end (delta: 99.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.52 ms. Allocated memory is still 162.5 MB. Free memory was 135.4 MB in the beginning and 125.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.78 ms. Allocated memory is still 162.5 MB. Free memory was 125.9 MB in the beginning and 124.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 329.07 ms. Allocated memory is still 162.5 MB. Free memory was 124.5 MB in the beginning and 110.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1128.51 ms. Allocated memory is still 162.5 MB. Free memory was 110.3 MB in the beginning and 73.5 MB in the end (delta: 36.8 MB). Peak memory consumption was 37.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] struct dummy d1, d2; [L15] int n = __VERIFIER_nondet_int(); [L16] EXPR n ? &d1 : &d2 VAL [d1={9:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}] [L16] struct dummy *pd = n ? &d1 : &d2; [L17] COND TRUE pd == &d2 [L18] pd->a = 0 VAL [d1={9:0}, d2={3:0}, n=0, pd={3:0}] [L22] pd == &d2 && d2.b != 0 [L22] EXPR d2.b [L22] pd == &d2 && d2.b != 0 VAL [d1={9:0}, d2={3:0}, d2.b=49, n=0, pd={3:0}, pd == &d2 && d2.b != 0=1] [L22] COND TRUE pd == &d2 && d2.b != 0 [L28] reach_error() VAL [d1={9:0}, d2={3:0}, n=0, pd={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 45 SDslu, 59 SDs, 0 SdLazy, 98 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1236 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...