/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/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 18:13:20,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:13:20,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:13:20,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:13:20,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:13:20,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:13:20,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:13:20,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:13:20,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:13:20,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:13:20,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:13:20,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:13:20,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:13:20,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:13:20,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:13:20,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:13:20,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:13:20,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:13:20,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:13:20,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:13:20,587 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 [2021-02-19 18:13:20,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:13:20,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:13:20,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:13:20,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:13:20,653 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:13:20,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:13:20,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:13:20,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:13:20,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:13:20,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:13:20,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:13:20,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:13:20,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:13:20,656 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:13:20,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:13:20,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:13:20,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:13:20,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:13:20,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:13:20,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:13:20,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:13:20,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:13:20,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:13:20,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:13:20,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:13:20,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:13:20,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:13:20,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 18:13:20,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:13:21,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:13:21,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:13:21,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:13:21,129 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 18:13:21,130 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 18:13:21,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2021-02-19 18:13:21,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9abaa57/ecfff66348f74f40bea1c47857ada76c/FLAGd869ec35a [2021-02-19 18:13:21,906 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 18:13:21,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c [2021-02-19 18:13:21,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9abaa57/ecfff66348f74f40bea1c47857ada76c/FLAGd869ec35a [2021-02-19 18:13:22,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9abaa57/ecfff66348f74f40bea1c47857ada76c [2021-02-19 18:13:22,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:13:22,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:13:22,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 18:13:22,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 18:13:22,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 18:13:22,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:13:22" (1/1) ... [2021-02-19 18:13:22,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@684735ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22, skipping insertion in model container [2021-02-19 18:13:22,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:13:22" (1/1) ... [2021-02-19 18:13:22,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 18:13:22,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 18:13:22,468 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c[364,377] [2021-02-19 18:13:22,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:13:22,495 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 18:13:22,511 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c[364,377] [2021-02-19 18:13:22,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:13:22,533 INFO L208 MainTranslator]: Completed translation [2021-02-19 18:13:22,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22 WrapperNode [2021-02-19 18:13:22,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 18:13:22,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:13:22,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:13:22,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:13:22,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22" (1/1) ... [2021-02-19 18:13:22,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22" (1/1) ... [2021-02-19 18:13:22,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22" (1/1) ... [2021-02-19 18:13:22,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22" (1/1) ... [2021-02-19 18:13:22,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22" (1/1) ... [2021-02-19 18:13:22,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22" (1/1) ... [2021-02-19 18:13:22,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22" (1/1) ... [2021-02-19 18:13:22,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:13:22,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:13:22,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:13:22,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:13:22,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22" (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 [2021-02-19 18:13:22,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 18:13:22,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:13:22,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 18:13:22,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-19 18:13:22,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 18:13:22,701 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 18:13:22,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 18:13:22,701 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 18:13:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 18:13:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-19 18:13:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-19 18:13:22,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 18:13:22,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 18:13:22,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 18:13:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:13:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 18:13:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 18:13:22,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 18:13:23,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:13:23,154 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-19 18:13:23,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:13:23 BoogieIcfgContainer [2021-02-19 18:13:23,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:13:23,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:13:23,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:13:23,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:13:23,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 06:13:22" (1/3) ... [2021-02-19 18:13:23,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4071c758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:13:23, skipping insertion in model container [2021-02-19 18:13:23,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:22" (2/3) ... [2021-02-19 18:13:23,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4071c758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:13:23, skipping insertion in model container [2021-02-19 18:13:23,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:13:23" (3/3) ... [2021-02-19 18:13:23,179 INFO L111 eAbstractionObserver]: Analyzing ICFG eq1.c [2021-02-19 18:13:23,187 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:13:23,194 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:13:23,221 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 18:13:23,309 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:13:23,309 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:13:23,309 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:13:23,310 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:13:23,310 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:13:23,313 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:13:23,313 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:13:23,314 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:13:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-02-19 18:13:23,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 18:13:23,373 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:13:23,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:13:23,381 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:13:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:13:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1706373939, now seen corresponding path program 1 times [2021-02-19 18:13:23,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:13:23,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018115265] [2021-02-19 18:13:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:13:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:23,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:23,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:23,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:23,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:23,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:13:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:23,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:23,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018115265] [2021-02-19 18:13:23,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:13:23,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:13:23,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431174272] [2021-02-19 18:13:23,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:13:23,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:13:23,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:13:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:13:23,858 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2021-02-19 18:13:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:13:23,921 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-02-19 18:13:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:13:23,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-02-19 18:13:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:13:23,932 INFO L225 Difference]: With dead ends: 32 [2021-02-19 18:13:23,933 INFO L226 Difference]: Without dead ends: 13 [2021-02-19 18:13:23,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:13:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-02-19 18:13:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-02-19 18:13:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-02-19 18:13:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-02-19 18:13:23,987 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-02-19 18:13:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:13:23,987 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-02-19 18:13:23,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-19 18:13:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-02-19 18:13:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 18:13:23,989 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:13:23,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:13:23,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:13:23,990 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:13:23,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:13:23,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1697138729, now seen corresponding path program 1 times [2021-02-19 18:13:23,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:13:23,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098046555] [2021-02-19 18:13:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:13:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:24,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:24,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:24,154 WARN L141 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size [2021-02-19 18:13:24,160 WARN L147 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size 7 [2021-02-19 18:13:24,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:24,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:13:24,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:24,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:13:24,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:24,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:24,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:13:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:24,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:24,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:24,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098046555] [2021-02-19 18:13:24,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:13:24,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:13:24,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007955991] [2021-02-19 18:13:24,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:13:24,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:13:24,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:13:24,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:13:24,255 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2021-02-19 18:13:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:13:24,409 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-02-19 18:13:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:13:24,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-02-19 18:13:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:13:24,410 INFO L225 Difference]: With dead ends: 13 [2021-02-19 18:13:24,411 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 18:13:24,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:13:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 18:13:24,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 18:13:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 18:13:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 18:13:24,414 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-02-19 18:13:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:13:24,414 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 18:13:24,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:13:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 18:13:24,415 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 18:13:24,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:13:24,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 18:13:24,562 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-19 18:13:24,563 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-19 18:13:24,563 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-19 18:13:24,563 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 18:13:24,564 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|)) [2021-02-19 18:13:24,564 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 18:13:24,564 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 18:13:24,565 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 18:13:24,565 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 18:13:24,565 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 18:13:24,565 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 11 25) the Hoare annotation is: true [2021-02-19 18:13:24,565 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 11 25) no Hoare annotation was computed. [2021-02-19 18:13:24,566 INFO L189 CegarLoopUtils]: For program point L23(line 23) no Hoare annotation was computed. [2021-02-19 18:13:24,566 INFO L189 CegarLoopUtils]: For program point L17(lines 17 21) no Hoare annotation was computed. [2021-02-19 18:13:24,566 INFO L185 CegarLoopUtils]: At program point L17-2(lines 16 22) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-19 18:13:24,567 INFO L185 CegarLoopUtils]: At program point L16-2(lines 16 22) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-19 18:13:24,567 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 11 25) no Hoare annotation was computed. [2021-02-19 18:13:24,567 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-19 18:13:24,567 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2021-02-19 18:13:24,568 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-02-19 18:13:24,568 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-02-19 18:13:24,569 INFO L189 CegarLoopUtils]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2021-02-19 18:13:24,569 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-02-19 18:13:24,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:13:24 BoogieIcfgContainer [2021-02-19 18:13:24,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:13:24,591 INFO L168 Benchmark]: Toolchain (without parser) took 2320.02 ms. Allocated memory is still 152.0 MB. Free memory was 128.1 MB in the beginning and 56.3 MB in the end (delta: 71.8 MB). Peak memory consumption was 72.0 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:24,592 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 152.0 MB. Free memory is still 126.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 18:13:24,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.02 ms. Allocated memory is still 152.0 MB. Free memory was 127.0 MB in the beginning and 117.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:24,594 INFO L168 Benchmark]: Boogie Preprocessor took 41.64 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:24,595 INFO L168 Benchmark]: RCFGBuilder took 581.40 ms. Allocated memory is still 152.0 MB. Free memory was 116.1 MB in the beginning and 134.4 MB in the end (delta: -18.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:24,596 INFO L168 Benchmark]: TraceAbstraction took 1424.73 ms. Allocated memory is still 152.0 MB. Free memory was 133.9 MB in the beginning and 56.3 MB in the end (delta: 77.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:24,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 152.0 MB. Free memory is still 126.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.02 ms. Allocated memory is still 152.0 MB. Free memory was 127.0 MB in the beginning and 117.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.64 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 581.40 ms. Allocated memory is still 152.0 MB. Free memory was 116.1 MB in the beginning and 134.4 MB in the end (delta: -18.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1424.73 ms. Allocated memory is still 152.0 MB. Free memory was 133.9 MB in the beginning and 56.3 MB in the end (delta: 77.6 MB). Peak memory consumption was 77.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 16]: Loop Invariant Derived loop invariant: x == w && z == y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 18 SDslu, 19 SDs, 0 SdLazy, 23 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 49 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 128 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 980 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...