/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:05:34,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:05:34,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:05:34,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 23:05:34,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:05:34,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:05:34,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:05:34,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:05:34,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:05:34,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:05:34,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:05:34,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:05:34,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:05:34,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:05:34,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:05:34,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:05:34,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 23:05:34,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:05:34,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:05:34,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:05:34,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:05:34,158 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:05:34,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:05:34,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:05:34,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:05:34,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:05:34,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:05:34,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:05:34,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:05:34,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:05:34,164 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:05:34,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:05:34,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:05:34,165 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:05:34,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:05:34,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:05:34,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:05:34,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:05:34,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:05:34,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:05:34,167 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:05:34,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:05:34,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:05:34,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:05:34,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:05:34,604 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:05:34,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2021-02-23 23:05:34,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd9857e18/a56aeb2b4fbd4c348b63f96f3c7ff7aa/FLAG76a4fbaf3 [2021-02-23 23:05:35,384 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:05:35,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c [2021-02-23 23:05:35,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd9857e18/a56aeb2b4fbd4c348b63f96f3c7ff7aa/FLAG76a4fbaf3 [2021-02-23 23:05:35,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd9857e18/a56aeb2b4fbd4c348b63f96f3c7ff7aa [2021-02-23 23:05:35,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:05:35,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:05:35,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:35,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:05:35,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:05:35,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:35" (1/1) ... [2021-02-23 23:05:35,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55010aaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:35, skipping insertion in model container [2021-02-23 23:05:35,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:35" (1/1) ... [2021-02-23 23:05:35,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:05:35,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:05:35,980 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] [2021-02-23 23:05:35,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:35,997 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:05:36,021 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] [2021-02-23 23:05:36,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:36,041 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:05:36,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36 WrapperNode [2021-02-23 23:05:36,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:36,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:05:36,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:05:36,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:05:36,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:05:36,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:05:36,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:05:36,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:05:36,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:05:36,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:05:36,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:05:36,201 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:05:36,202 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:05:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:05:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:05:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:05:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:05:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:05:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:05:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:05:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:05:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:05:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:05:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:05:36,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:05:36,691 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:05:36,694 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 23:05:36,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:36 BoogieIcfgContainer [2021-02-23 23:05:36,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:05:36,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:05:36,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:05:36,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:05:36,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:05:35" (1/3) ... [2021-02-23 23:05:36,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d0362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:36, skipping insertion in model container [2021-02-23 23:05:36,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (2/3) ... [2021-02-23 23:05:36,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d0362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:36, skipping insertion in model container [2021-02-23 23:05:36,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:36" (3/3) ... [2021-02-23 23:05:36,716 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-2.c [2021-02-23 23:05:36,725 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:05:36,731 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:05:36,757 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:05:36,787 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:05:36,788 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:05:36,788 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:05:36,788 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:05:36,788 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:05:36,789 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:05:36,789 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:05:36,789 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:05:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-02-23 23:05:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 23:05:36,818 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:36,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:05:36,820 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:36,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1684913090, now seen corresponding path program 1 times [2021-02-23 23:05:36,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:36,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51629670] [2021-02-23 23:05:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:37,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:37,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 23:05:37,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:37,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:05:37,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51629670] [2021-02-23 23:05:37,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:37,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 23:05:37,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470439641] [2021-02-23 23:05:37,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 23:05:37,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 23:05:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 23:05:37,443 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 5 states. [2021-02-23 23:05:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:37,749 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-02-23 23:05:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 23:05:37,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2021-02-23 23:05:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:37,763 INFO L225 Difference]: With dead ends: 89 [2021-02-23 23:05:37,763 INFO L226 Difference]: Without dead ends: 46 [2021-02-23 23:05:37,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 23:05:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-23 23:05:37,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-02-23 23:05:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-23 23:05:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-02-23 23:05:37,819 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2021-02-23 23:05:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:37,820 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-02-23 23:05:37,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 23:05:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-02-23 23:05:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 23:05:37,821 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:37,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:05:37,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:05:37,822 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:37,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1911061662, now seen corresponding path program 1 times [2021-02-23 23:05:37,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:37,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794365614] [2021-02-23 23:05:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:37,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 23:05:37,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:37,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:05:37,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794365614] [2021-02-23 23:05:37,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:37,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:05:37,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225464027] [2021-02-23 23:05:37,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:05:37,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:37,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:05:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:05:37,963 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2021-02-23 23:05:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:38,125 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-02-23 23:05:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:05:38,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-23 23:05:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:38,128 INFO L225 Difference]: With dead ends: 42 [2021-02-23 23:05:38,128 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 23:05:38,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:05:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 23:05:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-23 23:05:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-23 23:05:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-02-23 23:05:38,155 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2021-02-23 23:05:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:38,162 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-02-23 23:05:38,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:05:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-02-23 23:05:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 23:05:38,164 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:38,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:05:38,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:05:38,164 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2041206465, now seen corresponding path program 1 times [2021-02-23 23:05:38,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:38,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489821695] [2021-02-23 23:05:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:38,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:38,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:05:38,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:05:38,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:05:38,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:05:38,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:05:38,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 23:05:38,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:38,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:38,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:05:38,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489821695] [2021-02-23 23:05:38,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:38,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 23:05:38,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440797423] [2021-02-23 23:05:38,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 23:05:38,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:38,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 23:05:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-23 23:05:38,380 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2021-02-23 23:05:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:38,557 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-02-23 23:05:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 23:05:38,557 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2021-02-23 23:05:38,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:38,559 INFO L225 Difference]: With dead ends: 46 [2021-02-23 23:05:38,559 INFO L226 Difference]: Without dead ends: 32 [2021-02-23 23:05:38,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-02-23 23:05:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-23 23:05:38,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-02-23 23:05:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-23 23:05:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 31 transitions. [2021-02-23 23:05:38,568 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 31 transitions. Word has length 31 [2021-02-23 23:05:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:38,569 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 31 transitions. [2021-02-23 23:05:38,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 23:05:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 31 transitions. [2021-02-23 23:05:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 23:05:38,570 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:38,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 23:05:38,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:05:38,571 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:38,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:38,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1860060673, now seen corresponding path program 1 times [2021-02-23 23:05:38,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:38,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569159692] [2021-02-23 23:05:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:38,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:38,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:05:38,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 23:05:38,668 WARN L141 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size [2021-02-23 23:05:38,671 WARN L147 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size 20 [2021-02-23 23:05:38,703 WARN L141 QuantifierPusher]: treesize reduction 16, result has 65.2 percent of original size [2021-02-23 23:05:38,705 WARN L147 QuantifierPusher]: treesize reduction 16, result has 65.2 percent of original size 30 [2021-02-23 23:05:38,745 WARN L141 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size [2021-02-23 23:05:38,746 WARN L147 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size 9 [2021-02-23 23:05:38,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 23:05:38,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 23:05:38,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:38,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:38,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:05:38,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569159692] [2021-02-23 23:05:38,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:38,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 23:05:38,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591547766] [2021-02-23 23:05:38,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 23:05:38,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:38,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 23:05:38,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-23 23:05:38,882 INFO L87 Difference]: Start difference. First operand 32 states and 31 transitions. Second operand 10 states. [2021-02-23 23:05:39,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:39,100 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions. [2021-02-23 23:05:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 23:05:39,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-02-23 23:05:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:39,101 INFO L225 Difference]: With dead ends: 32 [2021-02-23 23:05:39,102 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 23:05:39,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-02-23 23:05:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 23:05:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 23:05:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 23:05:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 23:05:39,104 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-02-23 23:05:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:39,105 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 23:05:39,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 23:05:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 23:05:39,105 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 23:05:39,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 23:05:39,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 23:05:39,496 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 23:05:39,496 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 23:05:39,497 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 23:05:39,497 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 23:05:39,497 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 23:05:39,497 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 23:05:39,497 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 23:05:39,498 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 23:05:39,498 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 23:05:39,499 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|)) [2021-02-23 23:05:39,499 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 23:05:39,503 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 23:05:39,503 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 23:05:39,504 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 23:05:39,505 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 23:05:39,505 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 23:05:39,506 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 23:05:39,511 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 12 30) the Hoare annotation is: true [2021-02-23 23:05:39,513 INFO L185 CegarLoopUtils]: At program point L23(lines 13 30) the Hoare annotation is: false [2021-02-23 23:05:39,513 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 23:05:39,514 INFO L185 CegarLoopUtils]: At program point L15-1(line 15) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 23:05:39,514 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: false [2021-02-23 23:05:39,514 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 23:05:39,514 INFO L185 CegarLoopUtils]: At program point L20-1(lines 17 21) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) .cse1) (and .cse0 .cse1 (= |main_~#d1~0.base| main_~pd~0.base)))) [2021-02-23 23:05:39,515 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 23:05:39,515 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 23:05:39,515 INFO L185 CegarLoopUtils]: At program point L16-3(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 23:05:39,516 INFO L185 CegarLoopUtils]: At program point L16-4(line 16) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_#t~ite8.offset| 0) (= |main_#t~ite8.base| |main_~#d2~0.base|) .cse1) (and (= |main_~#d1~0.offset| |main_#t~ite8.offset|) .cse0 (= |main_~#d1~0.base| |main_#t~ite8.base|) .cse1))) [2021-02-23 23:05:39,517 INFO L185 CegarLoopUtils]: At program point L16-5(line 16) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_#t~ite8.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= |main_#t~ite8.base| |main_~#d2~0.base|) .cse1) (and (= |main_~#d1~0.offset| |main_#t~ite8.offset|) .cse0 (= |main_~#d1~0.offset| main_~pd~0.offset) (= |main_~#d1~0.base| |main_#t~ite8.base|) .cse1 (= |main_~#d1~0.base| main_~pd~0.base)))) [2021-02-23 23:05:39,517 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: false [2021-02-23 23:05:39,517 INFO L185 CegarLoopUtils]: At program point L17(lines 17 21) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d1~0.offset| main_~pd~0.offset) .cse1 (= |main_~#d1~0.base| main_~pd~0.base)) (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) .cse1))) [2021-02-23 23:05:39,517 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 12 30) the Hoare annotation is: true [2021-02-23 23:05:39,517 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 28) the Hoare annotation is: false [2021-02-23 23:05:39,518 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 12 30) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2021-02-23 23:05:39,518 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-02-23 23:05:39,518 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) .cse1) (and .cse0 .cse1 (= |main_~#d1~0.base| main_~pd~0.base) (not |main_#t~short10|)))) [2021-02-23 23:05:39,518 INFO L185 CegarLoopUtils]: At program point L22-1(line 22) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 23:05:39,519 INFO L185 CegarLoopUtils]: At program point L22-2(line 22) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (= |main_#t~mem9| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 23:05:39,519 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d1~0.offset| main_~pd~0.offset) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)) (= |main_~#d1~0.base| main_~pd~0.base)) [2021-02-23 23:05:39,520 INFO L185 CegarLoopUtils]: At program point L22-4(lines 22 24) the Hoare annotation is: (not |main_#t~short10|) [2021-02-23 23:05:39,521 INFO L185 CegarLoopUtils]: At program point L22-5(line 22) the Hoare annotation is: false [2021-02-23 23:05:39,521 INFO L185 CegarLoopUtils]: At program point L22-6(line 22) the Hoare annotation is: false [2021-02-23 23:05:39,521 INFO L192 CegarLoopUtils]: At program point L22-7(line 22) the Hoare annotation is: true [2021-02-23 23:05:39,522 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (= (select |#valid| |main_~#d1~0.base|) 1) [2021-02-23 23:05:39,522 INFO L192 CegarLoopUtils]: At program point L22-8(line 22) the Hoare annotation is: true [2021-02-23 23:05:39,522 INFO L185 CegarLoopUtils]: At program point L14-1(line 14) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 23:05:39,522 INFO L192 CegarLoopUtils]: At program point L14-2(line 14) the Hoare annotation is: true [2021-02-23 23:05:39,523 INFO L192 CegarLoopUtils]: At program point L14-3(line 14) the Hoare annotation is: true [2021-02-23 23:05:39,523 INFO L192 CegarLoopUtils]: At program point L14-4(line 14) the Hoare annotation is: true [2021-02-23 23:05:39,523 INFO L192 CegarLoopUtils]: At program point L14-5(line 14) the Hoare annotation is: true [2021-02-23 23:05:39,523 INFO L185 CegarLoopUtils]: At program point L14-6(line 14) the Hoare annotation is: false [2021-02-23 23:05:39,523 INFO L185 CegarLoopUtils]: At program point L14-7(line 14) the Hoare annotation is: false [2021-02-23 23:05:39,524 INFO L185 CegarLoopUtils]: At program point L14-8(line 14) the Hoare annotation is: false [2021-02-23 23:05:39,524 INFO L185 CegarLoopUtils]: At program point L14-9(line 14) the Hoare annotation is: false [2021-02-23 23:05:39,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:05:39 BoogieIcfgContainer [2021-02-23 23:05:39,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:05:39,547 INFO L168 Benchmark]: Toolchain (without parser) took 3769.92 ms. Allocated memory was 166.7 MB in the beginning and 202.4 MB in the end (delta: 35.7 MB). Free memory was 142.6 MB in the beginning and 105.6 MB in the end (delta: 37.0 MB). Peak memory consumption was 73.4 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:39,548 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 166.7 MB. Free memory is still 151.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:05:39,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.02 ms. Allocated memory is still 166.7 MB. Free memory was 141.4 MB in the beginning and 131.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:39,551 INFO L168 Benchmark]: Boogie Preprocessor took 41.98 ms. Allocated memory is still 166.7 MB. Free memory was 131.5 MB in the beginning and 130.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:39,558 INFO L168 Benchmark]: RCFGBuilder took 615.61 ms. Allocated memory is still 166.7 MB. Free memory was 130.1 MB in the beginning and 142.1 MB in the end (delta: -12.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:39,560 INFO L168 Benchmark]: TraceAbstraction took 2833.11 ms. Allocated memory was 166.7 MB in the beginning and 202.4 MB in the end (delta: 35.7 MB). Free memory was 141.7 MB in the beginning and 105.6 MB in the end (delta: 36.1 MB). Peak memory consumption was 72.8 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:39,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 166.7 MB. Free memory is still 151.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.02 ms. Allocated memory is still 166.7 MB. Free memory was 141.4 MB in the beginning and 131.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.98 ms. Allocated memory is still 166.7 MB. Free memory was 131.5 MB in the beginning and 130.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 615.61 ms. Allocated memory is still 166.7 MB. Free memory was 130.1 MB in the beginning and 142.1 MB in the end (delta: -12.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2833.11 ms. Allocated memory was 166.7 MB in the beginning and 202.4 MB in the end (delta: 35.7 MB). Free memory was 141.7 MB in the beginning and 105.6 MB in the end (delta: 36.1 MB). Peak memory consumption was 72.8 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 - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 88 SDslu, 291 SDs, 0 SdLazy, 251 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 51 LocationsWithAnnotation, 51 PreInvPairs, 79 NumberOfFragments, 452 HoareAnnotationTreeSize, 51 FomulaSimplifications, 34 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 51 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 10920 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...