/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/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:12:15,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:12:15,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:12:15,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:12:15,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:12:15,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:12:15,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:12:15,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:12:15,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:12:15,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:12:15,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:12:15,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:12:15,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:12:15,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:12:15,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:12:15,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:12:15,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:12:15,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:12:15,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:12:15,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:12:15,437 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 16:12:15,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:12:15,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:12:15,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:12:15,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:12:15,468 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:12:15,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:12:15,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:12:15,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:12:15,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:12:15,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:12:15,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:12:15,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:12:15,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:12:15,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:12:15,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:12:15,495 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:12:15,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:12:15,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:12:15,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:12:15,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:12:15,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:12:15,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:12:15,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:12:15,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:12:15,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:12:15,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:12:15,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:12:15,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:12:15,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:12:15,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:12:15,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:12:15,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:12:15,892 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:12:15,893 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:12:15,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2021-02-21 16:12:15,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0802257c0/0e436895b69b4d6aaee65cc32efff236/FLAG49a154206 [2021-02-21 16:12:16,657 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:12:16,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c [2021-02-21 16:12:16,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0802257c0/0e436895b69b4d6aaee65cc32efff236/FLAG49a154206 [2021-02-21 16:12:17,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0802257c0/0e436895b69b4d6aaee65cc32efff236 [2021-02-21 16:12:17,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:12:17,045 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:12:17,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:12:17,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:12:17,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:12:17,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:12:17" (1/1) ... [2021-02-21 16:12:17,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10291176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17, skipping insertion in model container [2021-02-21 16:12:17,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:12:17" (1/1) ... [2021-02-21 16:12:17,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:12:17,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:12:17,283 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/test28-2.c[576,589] [2021-02-21 16:12:17,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:12:17,309 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:12:17,335 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/test28-2.c[576,589] [2021-02-21 16:12:17,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:12:17,362 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:12:17,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:17 WrapperNode [2021-02-21 16:12:17,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:12:17,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:12:17,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:12:17,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:12:17,387 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 16:12:17,389 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 16:12:17,408 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 16:12:17,408 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 16:12:17,433 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 16:12:17,437 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 16:12:17,445 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 16:12:17,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:12:17,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:12:17,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:12:17,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:12:17,456 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 16:12:17,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:12:17,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:12:17,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:12:17,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:12:17,602 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:12:17,602 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:12:17,603 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:12:17,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:12:17,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:12:17,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:12:17,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:12:17,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:12:17,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:12:17,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:12:17,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:12:17,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:12:17,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:12:17,975 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:12:17,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:12:17 BoogieIcfgContainer [2021-02-21 16:12:17,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:12:17,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:12:17,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:12:17,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:12:17,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:12:17" (1/3) ... [2021-02-21 16:12:17,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f3fa32 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 16:12:17,995 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 16:12:17,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46f3fa32 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 16:12:17,996 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 16:12:18,001 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-2.c [2021-02-21 16:12:18,015 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:12:18,021 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:12:18,045 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:12:18,093 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:12:18,093 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:12:18,094 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:12:18,094 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:12:18,094 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:12:18,094 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:12:18,094 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:12:18,094 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:12:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-02-21 16:12:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-21 16:12:18,135 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:12:18,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:12:18,136 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:12:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:12:18,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1943681295, now seen corresponding path program 1 times [2021-02-21 16:12:18,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:12:18,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650267917] [2021-02-21 16:12:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:12:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:18,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:18,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:12:18,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:12:18,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:12:18,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:12:18,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 16:12:18,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:18,676 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-21 16:12:18,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:12:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:18,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:18,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:18,748 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 16:12:18,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650267917] [2021-02-21 16:12:18,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:12:18,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 16:12:18,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916248574] [2021-02-21 16:12:18,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 16:12:18,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:12:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 16:12:18,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-21 16:12:18,776 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 8 states. [2021-02-21 16:12:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:12:18,946 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-02-21 16:12:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 16:12:18,948 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2021-02-21 16:12:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:12:18,957 INFO L225 Difference]: With dead ends: 31 [2021-02-21 16:12:18,957 INFO L226 Difference]: Without dead ends: 14 [2021-02-21 16:12:18,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-21 16:12:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-02-21 16:12:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-02-21 16:12:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-02-21 16:12:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2021-02-21 16:12:19,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2021-02-21 16:12:19,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:12:19,004 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2021-02-21 16:12:19,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 16:12:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2021-02-21 16:12:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-21 16:12:19,005 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:12:19,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:12:19,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:12:19,006 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:12:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:12:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash -166826891, now seen corresponding path program 1 times [2021-02-21 16:12:19,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:12:19,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404114525] [2021-02-21 16:12:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:12:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:19,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:19,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:19,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:19,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:12:19,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:19,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:12:19,099 WARN L141 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size [2021-02-21 16:12:19,105 WARN L147 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size 20 [2021-02-21 16:12:19,143 WARN L141 QuantifierPusher]: treesize reduction 16, result has 65.2 percent of original size [2021-02-21 16:12:19,147 WARN L147 QuantifierPusher]: treesize reduction 16, result has 65.2 percent of original size 30 [2021-02-21 16:12:19,200 WARN L141 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size [2021-02-21 16:12:19,201 WARN L147 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size 9 [2021-02-21 16:12:19,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:19,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 16:12:19,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:19,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:19,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:12:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:19,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:19,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:19,313 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 16:12:19,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404114525] [2021-02-21 16:12:19,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:12:19,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 16:12:19,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530788330] [2021-02-21 16:12:19,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 16:12:19,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:12:19,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 16:12:19,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:12:19,319 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 9 states. [2021-02-21 16:12:19,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:12:19,418 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2021-02-21 16:12:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 16:12:19,418 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-02-21 16:12:19,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:12:19,419 INFO L225 Difference]: With dead ends: 14 [2021-02-21 16:12:19,419 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:12:19,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-21 16:12:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:12:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:12:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:12:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:12:19,422 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-02-21 16:12:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:12:19,422 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:12:19,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 16:12:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:12:19,422 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:12:19,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:12:19,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:12:19,491 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 16:12:19,492 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 16:12:19,492 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 16:12:19,492 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:12:19,493 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 16:12:19,493 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:12:19,493 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:12:19,493 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 16:12:19,493 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:12:19,493 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:12:19,494 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 12 30) no Hoare annotation was computed. [2021-02-21 16:12:19,494 INFO L185 CegarLoopUtils]: At program point L23(lines 13 30) the Hoare annotation is: false [2021-02-21 16:12:19,494 INFO L189 CegarLoopUtils]: For program point L17(lines 17 21) no Hoare annotation was computed. [2021-02-21 16:12:19,494 INFO L189 CegarLoopUtils]: For program point L17-2(lines 17 21) no Hoare annotation was computed. [2021-02-21 16:12:19,494 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 12 30) no Hoare annotation was computed. [2021-02-21 16:12:19,495 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 28) no Hoare annotation was computed. [2021-02-21 16:12:19,495 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 12 30) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2021-02-21 16:12:19,495 INFO L189 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2021-02-21 16:12:19,495 INFO L189 CegarLoopUtils]: For program point L22-2(lines 22 24) no Hoare annotation was computed. [2021-02-21 16:12:19,495 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-02-21 16:12:19,496 INFO L189 CegarLoopUtils]: For program point L16-2(line 16) no Hoare annotation was computed. [2021-02-21 16:12:19,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:12:19 BoogieIcfgContainer [2021-02-21 16:12:19,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:12:19,508 INFO L168 Benchmark]: Toolchain (without parser) took 2481.04 ms. Allocated memory is still 160.4 MB. Free memory was 136.0 MB in the beginning and 77.9 MB in the end (delta: 58.1 MB). Peak memory consumption was 57.9 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,509 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 160.4 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:12:19,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.38 ms. Allocated memory is still 160.4 MB. Free memory was 134.8 MB in the beginning and 125.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,511 INFO L168 Benchmark]: Boogie Preprocessor took 85.67 ms. Allocated memory is still 160.4 MB. Free memory was 125.5 MB in the beginning and 124.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,512 INFO L168 Benchmark]: RCFGBuilder took 525.64 ms. Allocated memory is still 160.4 MB. Free memory was 124.0 MB in the beginning and 110.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,513 INFO L168 Benchmark]: TraceAbstraction took 1524.96 ms. Allocated memory is still 160.4 MB. Free memory was 109.8 MB in the beginning and 77.9 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.7 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:19,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 160.4 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 316.38 ms. Allocated memory is still 160.4 MB. Free memory was 134.8 MB in the beginning and 125.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.67 ms. Allocated memory is still 160.4 MB. Free memory was 125.5 MB in the beginning and 124.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 525.64 ms. Allocated memory is still 160.4 MB. Free memory was 124.0 MB in the beginning and 110.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1524.96 ms. Allocated memory is still 160.4 MB. Free memory was 109.8 MB in the beginning and 77.9 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 28]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 28 SDslu, 52 SDs, 0 SdLazy, 96 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 41 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1752 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 correct! Received shutdown request...