/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/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:28:57,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:28:57,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:28:57,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 02:28:57,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 02:28:57,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 02:28:57,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 02:28:57,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 02:28:57,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 02:28:57,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 02:28:57,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 02:28:57,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 02:28:57,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:28:57,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:28:57,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:28:57,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:28:57,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:28:57,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:28:57,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:28:57,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:28:57,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:28:57,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:28:57,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:28:57,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:28:57,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:28:57,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:28:57,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:28:57,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:28:57,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:28:57,234 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:28:57,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:28:57,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:28:57,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:28:57,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:28:57,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:28:57,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:28:57,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:28:57,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:28:57,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:28:57,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:28:57,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:28:57,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:28:57,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:28:57,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:28:57,248 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:28:57,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:28:57,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:28:57,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:28:57,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:28:57,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:28:57,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:28:57,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:28:57,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:28:57,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:28:57,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:28:57,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:28:57,857 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:28:57,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-10-24 02:28:57,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8129064/ef231c16edba47b48df643410b7ce4ed/FLAG89bbc194f [2020-10-24 02:28:58,832 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:28:58,834 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2020-10-24 02:28:58,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8129064/ef231c16edba47b48df643410b7ce4ed/FLAG89bbc194f [2020-10-24 02:28:59,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8129064/ef231c16edba47b48df643410b7ce4ed [2020-10-24 02:28:59,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:28:59,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:28:59,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:28:59,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:28:59,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:28:59,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:28:59" (1/1) ... [2020-10-24 02:28:59,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ea80f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59, skipping insertion in model container [2020-10-24 02:28:59,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:28:59" (1/1) ... [2020-10-24 02:28:59,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:28:59,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:28:59,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:28:59,459 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:28:59,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:28:59,512 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:28:59,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59 WrapperNode [2020-10-24 02:28:59,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:28:59,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:28:59,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:28:59,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:28:59,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59" (1/1) ... [2020-10-24 02:28:59,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59" (1/1) ... [2020-10-24 02:28:59,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59" (1/1) ... [2020-10-24 02:28:59,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59" (1/1) ... [2020-10-24 02:28:59,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59" (1/1) ... [2020-10-24 02:28:59,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59" (1/1) ... [2020-10-24 02:28:59,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59" (1/1) ... [2020-10-24 02:28:59,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:28:59,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:28:59,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:28:59,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:28:59,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59" (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 [2020-10-24 02:28:59,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:28:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:28:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:28:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:28:59,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:28:59,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:28:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:28:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:28:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:28:59,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:28:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:28:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:28:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:28:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:28:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:28:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:28:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:28:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:28:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:28:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:28:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:28:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:29:00,241 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:29:00,241 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-24 02:29:00,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:00 BoogieIcfgContainer [2020-10-24 02:29:00,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:29:00,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:29:00,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:29:00,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:29:00,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:28:59" (1/3) ... [2020-10-24 02:29:00,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171b253f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:00, skipping insertion in model container [2020-10-24 02:29:00,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:59" (2/3) ... [2020-10-24 02:29:00,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171b253f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:00, skipping insertion in model container [2020-10-24 02:29:00,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:00" (3/3) ... [2020-10-24 02:29:00,259 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-10-24 02:29:00,279 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:29:00,287 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:29:00,307 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:29:00,344 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:29:00,345 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:29:00,345 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:29:00,345 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:29:00,345 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:29:00,346 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:29:00,346 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:29:00,346 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:29:00,368 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-10-24 02:29:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 02:29:00,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:00,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:00,384 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1720334319, now seen corresponding path program 1 times [2020-10-24 02:29:00,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:00,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659692120] [2020-10-24 02:29:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:01,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:01,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659692120] [2020-10-24 02:29:01,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:01,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 02:29:01,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965844220] [2020-10-24 02:29:01,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:29:01,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:01,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:29:01,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:29:01,164 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 8 states. [2020-10-24 02:29:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:02,258 INFO L93 Difference]: Finished difference Result 127 states and 161 transitions. [2020-10-24 02:29:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:29:02,260 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-24 02:29:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:02,275 INFO L225 Difference]: With dead ends: 127 [2020-10-24 02:29:02,275 INFO L226 Difference]: Without dead ends: 84 [2020-10-24 02:29:02,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:29:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-24 02:29:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-10-24 02:29:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-24 02:29:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-24 02:29:02,393 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 43 [2020-10-24 02:29:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:02,394 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-24 02:29:02,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:29:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-24 02:29:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-24 02:29:02,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:02,401 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:02,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:29:02,402 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash -545340875, now seen corresponding path program 1 times [2020-10-24 02:29:02,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:02,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101018567] [2020-10-24 02:29:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:02,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:02,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101018567] [2020-10-24 02:29:02,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:02,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:29:02,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387162017] [2020-10-24 02:29:02,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:29:02,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:02,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:29:02,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:29:02,654 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 10 states. [2020-10-24 02:29:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:03,680 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-10-24 02:29:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 02:29:03,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-24 02:29:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:03,687 INFO L225 Difference]: With dead ends: 97 [2020-10-24 02:29:03,687 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 02:29:03,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:29:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 02:29:03,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2020-10-24 02:29:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-24 02:29:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-24 02:29:03,721 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 49 [2020-10-24 02:29:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:03,721 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-24 02:29:03,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:29:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-24 02:29:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-24 02:29:03,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:03,724 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:03,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:29:03,725 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash 752260360, now seen corresponding path program 1 times [2020-10-24 02:29:03,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:03,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426636972] [2020-10-24 02:29:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:03,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-24 02:29:03,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426636972] [2020-10-24 02:29:03,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:03,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:29:03,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3636062] [2020-10-24 02:29:03,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:29:03,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:29:03,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:29:03,864 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 6 states. [2020-10-24 02:29:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:04,283 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2020-10-24 02:29:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:29:04,284 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-24 02:29:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:04,286 INFO L225 Difference]: With dead ends: 150 [2020-10-24 02:29:04,286 INFO L226 Difference]: Without dead ends: 100 [2020-10-24 02:29:04,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:29:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-24 02:29:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2020-10-24 02:29:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-24 02:29:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-24 02:29:04,321 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 55 [2020-10-24 02:29:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:04,321 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-24 02:29:04,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:29:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-24 02:29:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 02:29:04,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:04,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:04,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:29:04,325 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1337397749, now seen corresponding path program 1 times [2020-10-24 02:29:04,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:04,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845558033] [2020-10-24 02:29:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:04,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:04,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-24 02:29:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:29:04,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845558033] [2020-10-24 02:29:04,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:04,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:29:04,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103095178] [2020-10-24 02:29:04,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:29:04,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:04,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:29:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:29:04,493 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 9 states. [2020-10-24 02:29:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:05,193 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2020-10-24 02:29:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:29:05,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-24 02:29:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:05,195 INFO L225 Difference]: With dead ends: 142 [2020-10-24 02:29:05,195 INFO L226 Difference]: Without dead ends: 89 [2020-10-24 02:29:05,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:29:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-24 02:29:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-24 02:29:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-24 02:29:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-10-24 02:29:05,219 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 64 [2020-10-24 02:29:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:05,220 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-10-24 02:29:05,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:29:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-10-24 02:29:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-24 02:29:05,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:05,222 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:05,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:29:05,222 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:05,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:05,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2108788121, now seen corresponding path program 2 times [2020-10-24 02:29:05,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:05,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120841081] [2020-10-24 02:29:05,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:05,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:05,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-24 02:29:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-24 02:29:05,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120841081] [2020-10-24 02:29:05,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:05,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:29:05,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335542978] [2020-10-24 02:29:05,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:29:05,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:29:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:29:05,454 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 8 states. [2020-10-24 02:29:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:06,123 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-10-24 02:29:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:29:06,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-24 02:29:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:06,129 INFO L225 Difference]: With dead ends: 116 [2020-10-24 02:29:06,129 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 02:29:06,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:29:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 02:29:06,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-24 02:29:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-24 02:29:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2020-10-24 02:29:06,192 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 70 [2020-10-24 02:29:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:06,195 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2020-10-24 02:29:06,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:29:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2020-10-24 02:29:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-24 02:29:06,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:06,197 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:06,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:29:06,198 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:06,199 INFO L82 PathProgramCache]: Analyzing trace with hash -469024378, now seen corresponding path program 3 times [2020-10-24 02:29:06,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:06,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098001771] [2020-10-24 02:29:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:06,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:06,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-24 02:29:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:06,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-24 02:29:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-24 02:29:06,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098001771] [2020-10-24 02:29:06,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:06,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:29:06,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911362149] [2020-10-24 02:29:06,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:29:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:29:06,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:29:06,387 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand 10 states. [2020-10-24 02:29:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:07,311 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2020-10-24 02:29:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:29:07,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-24 02:29:07,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:07,317 INFO L225 Difference]: With dead ends: 146 [2020-10-24 02:29:07,318 INFO L226 Difference]: Without dead ends: 142 [2020-10-24 02:29:07,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:29:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-24 02:29:07,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 102. [2020-10-24 02:29:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-24 02:29:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-10-24 02:29:07,359 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 79 [2020-10-24 02:29:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:07,361 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-10-24 02:29:07,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:29:07,362 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-10-24 02:29:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-24 02:29:07,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:07,370 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:07,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:29:07,371 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:07,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1389623993, now seen corresponding path program 4 times [2020-10-24 02:29:07,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:07,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190499953] [2020-10-24 02:29:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:07,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:07,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-24 02:29:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:07,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-24 02:29:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:07,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-24 02:29:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-24 02:29:07,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190499953] [2020-10-24 02:29:07,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:07,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:29:07,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670770259] [2020-10-24 02:29:07,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:29:07,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:07,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:29:07,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:29:07,673 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 12 states. [2020-10-24 02:29:08,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:08,758 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2020-10-24 02:29:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:29:08,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 88 [2020-10-24 02:29:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:08,763 INFO L225 Difference]: With dead ends: 176 [2020-10-24 02:29:08,764 INFO L226 Difference]: Without dead ends: 172 [2020-10-24 02:29:08,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:29:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-24 02:29:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 111. [2020-10-24 02:29:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-24 02:29:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-10-24 02:29:08,801 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 88 [2020-10-24 02:29:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:08,802 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-10-24 02:29:08,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:29:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-10-24 02:29:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-24 02:29:08,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:08,815 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:08,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:29:08,815 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1150610086, now seen corresponding path program 5 times [2020-10-24 02:29:08,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:08,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961190575] [2020-10-24 02:29:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:09,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:09,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-24 02:29:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:09,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-24 02:29:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:09,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-24 02:29:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:09,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-24 02:29:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-24 02:29:09,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961190575] [2020-10-24 02:29:09,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:09,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:29:09,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902146419] [2020-10-24 02:29:09,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:29:09,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:09,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:29:09,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:29:09,246 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 16 states. [2020-10-24 02:29:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:11,906 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2020-10-24 02:29:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-24 02:29:11,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-24 02:29:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:11,910 INFO L225 Difference]: With dead ends: 163 [2020-10-24 02:29:11,910 INFO L226 Difference]: Without dead ends: 159 [2020-10-24 02:29:11,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=444, Invalid=1812, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:29:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-24 02:29:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 132. [2020-10-24 02:29:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-24 02:29:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2020-10-24 02:29:11,941 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 97 [2020-10-24 02:29:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:11,941 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2020-10-24 02:29:11,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:29:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2020-10-24 02:29:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-24 02:29:11,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:11,944 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2020-10-24 02:29:11,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:29:11,944 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:11,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:11,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1372166708, now seen corresponding path program 6 times [2020-10-24 02:29:11,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:11,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162322623] [2020-10-24 02:29:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-24 02:29:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-24 02:29:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-24 02:29:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-24 02:29:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-24 02:29:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-10-24 02:29:12,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162322623] [2020-10-24 02:29:12,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:12,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:29:12,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230233077] [2020-10-24 02:29:12,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:29:12,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:29:12,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:29:12,085 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand 7 states. [2020-10-24 02:29:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:12,638 INFO L93 Difference]: Finished difference Result 214 states and 243 transitions. [2020-10-24 02:29:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:29:12,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-10-24 02:29:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:12,641 INFO L225 Difference]: With dead ends: 214 [2020-10-24 02:29:12,641 INFO L226 Difference]: Without dead ends: 134 [2020-10-24 02:29:12,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:29:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-24 02:29:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-10-24 02:29:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-24 02:29:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 147 transitions. [2020-10-24 02:29:12,672 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 147 transitions. Word has length 112 [2020-10-24 02:29:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:12,673 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 147 transitions. [2020-10-24 02:29:12,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:29:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 147 transitions. [2020-10-24 02:29:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-24 02:29:12,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:12,675 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2020-10-24 02:29:12,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:29:12,676 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:12,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2139141218, now seen corresponding path program 7 times [2020-10-24 02:29:12,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:12,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694200724] [2020-10-24 02:29:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-24 02:29:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-24 02:29:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-24 02:29:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-24 02:29:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-24 02:29:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-24 02:29:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 69 proven. 47 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-10-24 02:29:12,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694200724] [2020-10-24 02:29:12,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:12,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:29:12,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821647914] [2020-10-24 02:29:12,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:29:12,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:29:12,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:29:12,870 INFO L87 Difference]: Start difference. First operand 132 states and 147 transitions. Second operand 8 states. [2020-10-24 02:29:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:13,311 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2020-10-24 02:29:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:29:13,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-10-24 02:29:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:13,312 INFO L225 Difference]: With dead ends: 132 [2020-10-24 02:29:13,313 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 02:29:13,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:29:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 02:29:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 02:29:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 02:29:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 02:29:13,319 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2020-10-24 02:29:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:13,320 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 02:29:13,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:29:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 02:29:13,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 02:29:13,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:29:13,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 02:29:13,463 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 54 [2020-10-24 02:29:13,834 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-10-24 02:29:13,982 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-24 02:29:14,967 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 18 [2020-10-24 02:29:15,079 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 12 [2020-10-24 02:29:15,463 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,463 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,464 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,464 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,464 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,464 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,464 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:15,464 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:15,465 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-24 02:29:15,465 INFO L277 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,465 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,465 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,466 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-24 02:29:15,466 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,466 INFO L277 CegarLoopResult]: At program point L12-4(line 12) the Hoare annotation is: true [2020-10-24 02:29:15,466 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:15,466 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:15,467 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:15,467 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-24 02:29:15,467 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-24 02:29:15,468 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-24 02:29:15,468 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-24 02:29:15,468 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:15,468 INFO L274 CegarLoopResult]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:15,468 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:15,468 INFO L270 CegarLoopResult]: At program point L35-3(lines 35 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,469 INFO L277 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: true [2020-10-24 02:29:15,469 INFO L270 CegarLoopResult]: At program point L35-4(line 35) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,469 INFO L277 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: true [2020-10-24 02:29:15,469 INFO L270 CegarLoopResult]: At program point L35-5(line 35) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,469 INFO L270 CegarLoopResult]: At program point L35-6(lines 35 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,469 INFO L277 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-10-24 02:29:15,469 INFO L277 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: true [2020-10-24 02:29:15,470 INFO L277 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: true [2020-10-24 02:29:15,470 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 25 40) the Hoare annotation is: true [2020-10-24 02:29:15,470 INFO L270 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,470 INFO L270 CegarLoopResult]: At program point L36-3(line 36) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~k~0 1) main_~j~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,471 INFO L277 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-10-24 02:29:15,471 INFO L270 CegarLoopResult]: At program point L36-4(line 36) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,471 INFO L277 CegarLoopResult]: At program point L32-1(line 32) the Hoare annotation is: true [2020-10-24 02:29:15,471 INFO L270 CegarLoopResult]: At program point L36-5(lines 36 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,471 INFO L277 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-10-24 02:29:15,471 INFO L277 CegarLoopResult]: At program point L28-1(line 28) the Hoare annotation is: true [2020-10-24 02:29:15,471 INFO L277 CegarLoopResult]: At program point L28-2(line 28) the Hoare annotation is: true [2020-10-24 02:29:15,472 INFO L270 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~k~0 1) main_~j~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,472 INFO L270 CegarLoopResult]: At program point L37-1(lines 36 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~k~0 1) main_~j~0) (<= (+ main_~j~0 1) (* 3 main_~i~0)) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,472 INFO L277 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-10-24 02:29:15,472 INFO L277 CegarLoopResult]: At program point L33-1(line 33) the Hoare annotation is: true [2020-10-24 02:29:15,472 INFO L277 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: true [2020-10-24 02:29:15,472 INFO L277 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: true [2020-10-24 02:29:15,473 INFO L277 CegarLoopResult]: At program point L29-2(line 29) the Hoare annotation is: true [2020-10-24 02:29:15,473 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 25 40) the Hoare annotation is: true [2020-10-24 02:29:15,473 INFO L277 CegarLoopResult]: At program point L38(lines 25 40) the Hoare annotation is: true [2020-10-24 02:29:15,473 INFO L270 CegarLoopResult]: At program point L34-2(lines 34 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (* 3 main_~i~0) main_~j~0) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,473 INFO L270 CegarLoopResult]: At program point L34-3(line 34) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (* 3 main_~i~0) main_~j~0) (<= (+ main_~i~0 1) main_~n~0) (<= (+ |main_#t~post6| 2) (* 2 main_~n~0))) [2020-10-24 02:29:15,474 INFO L277 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-10-24 02:29:15,474 INFO L270 CegarLoopResult]: At program point L34-4(line 34) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) .cse0) (<= (+ |main_#t~post6| 2) .cse0))) [2020-10-24 02:29:15,474 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 25 40) the Hoare annotation is: true [2020-10-24 02:29:15,474 INFO L277 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: true [2020-10-24 02:29:15,474 INFO L270 CegarLoopResult]: At program point L34-5(lines 34 37) the Hoare annotation is: (or (= main_~i~0 0) (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) (* 2 main_~n~0)))) [2020-10-24 02:29:15,474 INFO L277 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-10-24 02:29:15,474 INFO L277 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: true [2020-10-24 02:29:15,475 INFO L277 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: true [2020-10-24 02:29:15,475 INFO L277 CegarLoopResult]: At program point L26-3(line 26) the Hoare annotation is: true [2020-10-24 02:29:15,475 INFO L277 CegarLoopResult]: At program point L26-4(line 26) the Hoare annotation is: true [2020-10-24 02:29:15,475 INFO L270 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 1 main_~n~0) (<= (+ main_~i~0 1) main_~n~0)) [2020-10-24 02:29:15,475 INFO L270 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:29:15,475 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-24 02:29:15,476 INFO L270 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:29:15,476 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:15,476 INFO L270 CegarLoopResult]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:29:15,476 INFO L270 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:15,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:29:15 BoogieIcfgContainer [2020-10-24 02:29:15,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:29:15,503 INFO L168 Benchmark]: Toolchain (without parser) took 16355.75 ms. Allocated memory was 161.5 MB in the beginning and 291.5 MB in the end (delta: 130.0 MB). Free memory was 138.2 MB in the beginning and 145.5 MB in the end (delta: -7.3 MB). Peak memory consumption was 164.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:15,503 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 161.5 MB. Free memory is still 135.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:29:15,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.50 ms. Allocated memory is still 161.5 MB. Free memory was 137.7 MB in the beginning and 127.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:15,505 INFO L168 Benchmark]: Boogie Preprocessor took 57.02 ms. Allocated memory is still 161.5 MB. Free memory was 127.4 MB in the beginning and 125.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:15,506 INFO L168 Benchmark]: RCFGBuilder took 671.31 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 139.3 MB in the end (delta: -13.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:15,507 INFO L168 Benchmark]: TraceAbstraction took 15253.39 ms. Allocated memory was 161.5 MB in the beginning and 291.5 MB in the end (delta: 130.0 MB). Free memory was 138.8 MB in the beginning and 145.5 MB in the end (delta: -6.7 MB). Peak memory consumption was 163.7 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:15,511 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 161.5 MB. Free memory is still 135.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 353.50 ms. Allocated memory is still 161.5 MB. Free memory was 137.7 MB in the beginning and 127.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.02 ms. Allocated memory is still 161.5 MB. Free memory was 127.4 MB in the beginning and 125.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 671.31 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 139.3 MB in the end (delta: -13.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15253.39 ms. Allocated memory was 161.5 MB in the beginning and 291.5 MB in the end (delta: 130.0 MB). Free memory was 138.8 MB in the beginning and 145.5 MB in the end (delta: -6.7 MB). Peak memory consumption was 163.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 <= n && i + 1 <= n - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: i == 0 || (1 <= n && i + 1 <= 2 * n) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (1 <= n && j + 1 <= 3 * i) && i + 1 <= n - ProcedureContractResult [Line: 12]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 25]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.9s, OverallIterations: 10, TraceHistogramMax: 7, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 481 SDtfs, 1141 SDslu, 840 SDs, 0 SdLazy, 2983 SolverSat, 204 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 253 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 183 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 67 LocationsWithAnnotation, 271 PreInvPairs, 369 NumberOfFragments, 342 HoareAnnotationTreeSize, 271 FomulaSimplifications, 1359927 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 67 FomulaSimplificationsInter, 3552 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 784 NumberOfCodeBlocks, 784 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 774 ConstructedInterpolants, 0 QuantifiedInterpolants, 185178 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 448/600 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...