/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-b7b32d2 [2021-02-21 16:12:15,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:12:15,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:12:15,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:12:15,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:12:15,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:12:15,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:12:15,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:12:15,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:12:15,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:12:15,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:12:15,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:12:15,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:12:15,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:12:15,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:12:15,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:12:15,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:12:15,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:12:15,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:12:15,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:12:15,324 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 [2021-02-21 16:12:15,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:12:15,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:12:15,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:12:15,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:12:15,352 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:12:15,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:12:15,353 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:12:15,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:12:15,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:12:15,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:12:15,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:12:15,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:12:15,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:12:15,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:12:15,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:12:15,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:12:15,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:12:15,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:12:15,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:12:15,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:12:15,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:12:15,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:12:15,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:12:15,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:12:15,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:12:15,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:12:15,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:12:15,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:12:15,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:12:15,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:12:15,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:12:15,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:12:15,767 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:12:15,768 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:12:15,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2021-02-21 16:12:15,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308677a6b/fa348a4da07547ca91615f7a1e8e2d29/FLAG4e890f57d [2021-02-21 16:12:16,471 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:12:16,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2021-02-21 16:12:16,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308677a6b/fa348a4da07547ca91615f7a1e8e2d29/FLAG4e890f57d [2021-02-21 16:12:16,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308677a6b/fa348a4da07547ca91615f7a1e8e2d29 [2021-02-21 16:12:16,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:12:16,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:12:16,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:12:16,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:12:16,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:12:16,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:12:16" (1/1) ... [2021-02-21 16:12:16,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363d787b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:16, skipping insertion in model container [2021-02-21 16:12:16,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:12:16" (1/1) ... [2021-02-21 16:12:16,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:12:16,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:12:17,038 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] [2021-02-21 16:12:17,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:12:17,053 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:12:17,072 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] [2021-02-21 16:12:17,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:12:17,089 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:12:17,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17 WrapperNode [2021-02-21 16:12:17,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:12:17,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:12:17,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:12:17,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:12:17,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17" (1/1) ... [2021-02-21 16:12:17,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17" (1/1) ... [2021-02-21 16:12:17,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17" (1/1) ... [2021-02-21 16:12:17,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17" (1/1) ... [2021-02-21 16:12:17,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17" (1/1) ... [2021-02-21 16:12:17,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17" (1/1) ... [2021-02-21 16:12:17,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17" (1/1) ... [2021-02-21 16:12:17,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:12:17,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:12:17,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:12:17,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:12:17,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17" (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 [2021-02-21 16:12:17,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:12:17,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:12:17,325 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:12:17,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:12:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:12:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:12:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:12:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:12:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:12:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:12:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:12:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:12:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:12:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:12:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:12:17,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:12:17,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:12:17,621 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:12:17,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:12:17 BoogieIcfgContainer [2021-02-21 16:12:17,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:12:17,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:12:17,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:12:17,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:12:17,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:12:16" (1/3) ... [2021-02-21 16:12:17,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a856f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:12:17, skipping insertion in model container [2021-02-21 16:12:17,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17" (2/3) ... [2021-02-21 16:12:17,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a856f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:12:17, skipping insertion in model container [2021-02-21 16:12:17,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:12:17" (3/3) ... [2021-02-21 16:12:17,644 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2021-02-21 16:12:17,661 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:12:17,673 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:12:17,709 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:12:17,756 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:12:17,756 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:12:17,756 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:12:17,756 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:12:17,756 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:12:17,757 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:12:17,757 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:12:17,757 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:12:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-02-21 16:12:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-21 16:12:17,786 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:12:17,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:12:17,788 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:12:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:12:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1943681295, now seen corresponding path program 1 times [2021-02-21 16:12:17,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:12:17,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016024851] [2021-02-21 16:12:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:12:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:18,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:18,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:12:18,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:12:18,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:12:18,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:18,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:12:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:18,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:12:18,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016024851] [2021-02-21 16:12:18,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:12:18,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:12:18,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149026967] [2021-02-21 16:12:18,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:12:18,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:12:18,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:12:18,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:12:18,412 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2021-02-21 16:12:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:12:18,568 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-02-21 16:12:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:12:18,571 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2021-02-21 16:12:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:12:18,580 INFO L225 Difference]: With dead ends: 34 [2021-02-21 16:12:18,580 INFO L226 Difference]: Without dead ends: 21 [2021-02-21 16:12:18,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-21 16:12:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-02-21 16:12:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-02-21 16:12:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-02-21 16:12:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-02-21 16:12:18,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2021-02-21 16:12:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:12:18,629 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-02-21 16:12:18,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:12:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-02-21 16:12:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-21 16:12:18,630 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:12:18,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:12:18,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:12:18,631 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:12:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:12:18,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1941834253, now seen corresponding path program 1 times [2021-02-21 16:12:18,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:12:18,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722342900] [2021-02-21 16:12:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:12:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:18,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:18,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:12:18,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:12:18,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:12:18,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:12:18,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 16:12:18,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:18,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:12:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:18,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:12:18,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722342900] [2021-02-21 16:12:18,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:12:18,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 16:12:18,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60446917] [2021-02-21 16:12:18,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 16:12:18,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:12:18,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 16:12:18,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-21 16:12:18,877 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2021-02-21 16:12:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:12:19,102 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-02-21 16:12:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 16:12:19,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-02-21 16:12:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:12:19,104 INFO L225 Difference]: With dead ends: 23 [2021-02-21 16:12:19,104 INFO L226 Difference]: Without dead ends: 14 [2021-02-21 16:12:19,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-21 16:12:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-02-21 16:12:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-02-21 16:12:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-02-21 16:12:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2021-02-21 16:12:19,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2021-02-21 16:12:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:12:19,113 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2021-02-21 16:12:19,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 16:12:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2021-02-21 16:12:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-21 16:12:19,114 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:12:19,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:12:19,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:12:19,114 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:12:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:12:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash -168673933, now seen corresponding path program 1 times [2021-02-21 16:12:19,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:12:19,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989956964] [2021-02-21 16:12:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:12:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:12:19,144 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:12:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:12:19,189 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:12:19,242 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:12:19,243 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:12:19,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:12:19,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:12:19 BoogieIcfgContainer [2021-02-21 16:12:19,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:12:19,294 INFO L168 Benchmark]: Toolchain (without parser) took 2451.38 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 110.5 MB in the beginning and 136.2 MB in the end (delta: -25.7 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,295 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:12:19,296 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.61 ms. Allocated memory is still 154.1 MB. Free memory was 109.5 MB in the beginning and 99.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,297 INFO L168 Benchmark]: Boogie Preprocessor took 82.47 ms. Allocated memory is still 154.1 MB. Free memory was 99.6 MB in the beginning and 136.9 MB in the end (delta: -37.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,297 INFO L168 Benchmark]: RCFGBuilder took 449.26 ms. Allocated memory is still 154.1 MB. Free memory was 136.9 MB in the beginning and 125.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,299 INFO L168 Benchmark]: TraceAbstraction took 1666.80 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 124.6 MB in the beginning and 136.2 MB in the end (delta: -11.7 MB). Peak memory consumption was 20.3 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.61 ms. Allocated memory is still 154.1 MB. Free memory was 109.5 MB in the beginning and 99.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 82.47 ms. Allocated memory is still 154.1 MB. Free memory was 99.6 MB in the beginning and 136.9 MB in the end (delta: -37.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 449.26 ms. Allocated memory is still 154.1 MB. Free memory was 136.9 MB in the beginning and 125.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1666.80 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 124.6 MB in the beginning and 136.2 MB in the end (delta: -11.7 MB). Peak memory consumption was 20.3 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: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, 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, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s 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, 0.1s SatisfiabilityAnalysisTime, 0.5s 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...