/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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:35:19,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:35:19,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:35:19,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:35:19,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:35:19,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:35:19,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:35:19,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:35:19,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:35:19,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:35:19,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:35:19,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:35:19,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:35:19,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:35:19,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:35:19,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:35:19,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:35:19,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:35:19,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:35:19,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:35:19,666 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:35:19,686 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:35:19,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:35:19,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:35:19,692 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:35:19,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:35:19,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:35:19,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:35:19,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:35:19,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:35:19,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:35:19,695 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:35:19,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:35:19,695 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:35:19,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:35:19,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:35:19,696 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:35:19,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:35:19,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:35:19,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:19,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:35:19,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:35:19,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:35:19,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:35:20,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:35:20,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:35:20,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:35:20,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:35:20,170 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:35:20,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-11-07 06:35:20,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40419cd9e/f7105eb6af67493baa714e4708153471/FLAG31d28a3bb [2020-11-07 06:35:20,841 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:35:20,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2020-11-07 06:35:20,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40419cd9e/f7105eb6af67493baa714e4708153471/FLAG31d28a3bb [2020-11-07 06:35:21,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40419cd9e/f7105eb6af67493baa714e4708153471 [2020-11-07 06:35:21,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:21,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:21,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:21,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:21,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:21,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:21" (1/1) ... [2020-11-07 06:35:21,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7adc0c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21, skipping insertion in model container [2020-11-07 06:35:21,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:21" (1/1) ... [2020-11-07 06:35:21,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:21,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:21,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:21,400 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:21,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:21,431 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:21,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21 WrapperNode [2020-11-07 06:35:21,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:21,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:21,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:21,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:21,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21" (1/1) ... [2020-11-07 06:35:21,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21" (1/1) ... [2020-11-07 06:35:21,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21" (1/1) ... [2020-11-07 06:35:21,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21" (1/1) ... [2020-11-07 06:35:21,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21" (1/1) ... [2020-11-07 06:35:21,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21" (1/1) ... [2020-11-07 06:35:21,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21" (1/1) ... [2020-11-07 06:35:21,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:21,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:21,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:21,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:21,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21" (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 [2020-11-07 06:35:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:21,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:35:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:35:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:21,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:21,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:21,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:21,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:21,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:21,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:21,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:21,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:21,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:21,861 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:21,861 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:35:21,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:21 BoogieIcfgContainer [2020-11-07 06:35:21,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:21,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:21,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:21,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:21,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:21" (1/3) ... [2020-11-07 06:35:21,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2719f11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:21, skipping insertion in model container [2020-11-07 06:35:21,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:21" (2/3) ... [2020-11-07 06:35:21,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2719f11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:21, skipping insertion in model container [2020-11-07 06:35:21,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:21" (3/3) ... [2020-11-07 06:35:21,874 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-11-07 06:35:21,896 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:21,902 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:21,920 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:21,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:21,955 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:21,956 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:21,956 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:21,956 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:21,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:21,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:21,957 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-11-07 06:35:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 06:35:22,018 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:22,019 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] [2020-11-07 06:35:22,019 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:22,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1356775911, now seen corresponding path program 1 times [2020-11-07 06:35:22,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:22,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574761041] [2020-11-07 06:35:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:22,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574761041] [2020-11-07 06:35:22,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:22,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:35:22,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666832327] [2020-11-07 06:35:22,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:35:22,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:35:22,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:22,466 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-11-07 06:35:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:22,602 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-11-07 06:35:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:35:22,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-07 06:35:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:22,621 INFO L225 Difference]: With dead ends: 50 [2020-11-07 06:35:22,621 INFO L226 Difference]: Without dead ends: 27 [2020-11-07 06:35:22,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:22,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-07 06:35:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-07 06:35:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-07 06:35:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-07 06:35:22,706 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2020-11-07 06:35:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:22,707 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-07 06:35:22,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:35:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-07 06:35:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-07 06:35:22,709 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:22,709 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] [2020-11-07 06:35:22,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:22,711 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:22,712 INFO L82 PathProgramCache]: Analyzing trace with hash -896925557, now seen corresponding path program 1 times [2020-11-07 06:35:22,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:22,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026867208] [2020-11-07 06:35:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:22,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026867208] [2020-11-07 06:35:22,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:22,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 06:35:22,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270819758] [2020-11-07 06:35:22,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 06:35:22,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:22,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 06:35:22,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 06:35:22,840 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 4 states. [2020-11-07 06:35:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:22,967 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-11-07 06:35:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 06:35:22,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-07 06:35:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:22,969 INFO L225 Difference]: With dead ends: 45 [2020-11-07 06:35:22,969 INFO L226 Difference]: Without dead ends: 32 [2020-11-07 06:35:22,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:35:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-07 06:35:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-11-07 06:35:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-07 06:35:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-07 06:35:22,983 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 21 [2020-11-07 06:35:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:22,983 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-07 06:35:22,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 06:35:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-07 06:35:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 06:35:22,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:22,985 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] [2020-11-07 06:35:22,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:22,985 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:22,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1043838685, now seen corresponding path program 1 times [2020-11-07 06:35:22,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:22,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090407497] [2020-11-07 06:35:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:23,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090407497] [2020-11-07 06:35:23,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:23,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:35:23,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258147516] [2020-11-07 06:35:23,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:23,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:23,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:23,125 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2020-11-07 06:35:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:23,329 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-11-07 06:35:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:35:23,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-11-07 06:35:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:23,331 INFO L225 Difference]: With dead ends: 51 [2020-11-07 06:35:23,331 INFO L226 Difference]: Without dead ends: 38 [2020-11-07 06:35:23,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:23,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-07 06:35:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-11-07 06:35:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-07 06:35:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-11-07 06:35:23,344 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 27 [2020-11-07 06:35:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:23,345 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-11-07 06:35:23,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-11-07 06:35:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 06:35:23,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:23,346 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 06:35:23,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:23,347 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:23,347 INFO L82 PathProgramCache]: Analyzing trace with hash -68960325, now seen corresponding path program 2 times [2020-11-07 06:35:23,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:23,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303031306] [2020-11-07 06:35:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:23,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303031306] [2020-11-07 06:35:23,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:23,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-07 06:35:23,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209885508] [2020-11-07 06:35:23,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:35:23,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:35:23,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:35:23,449 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 8 states. [2020-11-07 06:35:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:23,772 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-07 06:35:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 06:35:23,773 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-11-07 06:35:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:23,774 INFO L225 Difference]: With dead ends: 56 [2020-11-07 06:35:23,775 INFO L226 Difference]: Without dead ends: 43 [2020-11-07 06:35:23,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:35:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-07 06:35:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-11-07 06:35:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-07 06:35:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-11-07 06:35:23,787 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 33 [2020-11-07 06:35:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:23,788 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-11-07 06:35:23,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:35:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-11-07 06:35:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 06:35:23,790 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:23,790 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:23,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:35:23,790 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:23,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2109858899, now seen corresponding path program 3 times [2020-11-07 06:35:23,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:23,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706335284] [2020-11-07 06:35:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:23,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706335284] [2020-11-07 06:35:23,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:23,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:35:23,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93565666] [2020-11-07 06:35:23,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:35:23,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:23,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:35:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:35:23,910 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2020-11-07 06:35:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:24,387 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-11-07 06:35:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:24,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-11-07 06:35:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:24,389 INFO L225 Difference]: With dead ends: 55 [2020-11-07 06:35:24,389 INFO L226 Difference]: Without dead ends: 48 [2020-11-07 06:35:24,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-07 06:35:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-11-07 06:35:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-07 06:35:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-11-07 06:35:24,402 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2020-11-07 06:35:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:24,402 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-11-07 06:35:24,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:35:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-11-07 06:35:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-07 06:35:24,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:24,404 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:24,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:35:24,404 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:24,405 INFO L82 PathProgramCache]: Analyzing trace with hash 788096674, now seen corresponding path program 1 times [2020-11-07 06:35:24,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:24,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436150860] [2020-11-07 06:35:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:24,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436150860] [2020-11-07 06:35:24,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:24,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:24,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952382243] [2020-11-07 06:35:24,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:24,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:24,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:24,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:24,568 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 12 states. [2020-11-07 06:35:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:25,272 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-11-07 06:35:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 06:35:25,273 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-11-07 06:35:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:25,278 INFO L225 Difference]: With dead ends: 60 [2020-11-07 06:35:25,278 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 06:35:25,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:35:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 06:35:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-11-07 06:35:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-07 06:35:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-11-07 06:35:25,312 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 44 [2020-11-07 06:35:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:25,312 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-11-07 06:35:25,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-11-07 06:35:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 06:35:25,316 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:25,318 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:25,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:35:25,319 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:25,319 INFO L82 PathProgramCache]: Analyzing trace with hash 82967987, now seen corresponding path program 2 times [2020-11-07 06:35:25,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:25,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173396791] [2020-11-07 06:35:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:25,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173396791] [2020-11-07 06:35:25,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:25,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-07 06:35:25,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833631746] [2020-11-07 06:35:25,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 06:35:25,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 06:35:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:35:25,542 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 14 states. [2020-11-07 06:35:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:26,316 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-11-07 06:35:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 06:35:26,317 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-11-07 06:35:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:26,318 INFO L225 Difference]: With dead ends: 65 [2020-11-07 06:35:26,319 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 06:35:26,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=591, Unknown=0, NotChecked=0, Total=870 [2020-11-07 06:35:26,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 06:35:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-11-07 06:35:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-07 06:35:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-11-07 06:35:26,334 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 49 [2020-11-07 06:35:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:26,334 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-11-07 06:35:26,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 06:35:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-11-07 06:35:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 06:35:26,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:26,336 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:26,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:35:26,336 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -222156478, now seen corresponding path program 3 times [2020-11-07 06:35:26,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:26,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202393096] [2020-11-07 06:35:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:26,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202393096] [2020-11-07 06:35:26,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:26,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-11-07 06:35:26,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967240168] [2020-11-07 06:35:26,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 06:35:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 06:35:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:35:26,584 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 16 states. [2020-11-07 06:35:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:27,478 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-11-07 06:35:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 06:35:27,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-11-07 06:35:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:27,480 INFO L225 Difference]: With dead ends: 70 [2020-11-07 06:35:27,480 INFO L226 Difference]: Without dead ends: 63 [2020-11-07 06:35:27,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:35:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-07 06:35:27,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-11-07 06:35:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-07 06:35:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-11-07 06:35:27,512 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 54 [2020-11-07 06:35:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:27,517 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-11-07 06:35:27,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 06:35:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-11-07 06:35:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 06:35:27,518 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:27,518 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:27,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:35:27,519 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:27,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2069487379, now seen corresponding path program 4 times [2020-11-07 06:35:27,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:27,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902770763] [2020-11-07 06:35:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:27,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902770763] [2020-11-07 06:35:27,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:27,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-11-07 06:35:27,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496793647] [2020-11-07 06:35:27,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 06:35:27,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:27,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 06:35:27,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-07 06:35:27,846 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 18 states. [2020-11-07 06:35:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:28,947 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-11-07 06:35:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 06:35:28,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-11-07 06:35:28,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:28,951 INFO L225 Difference]: With dead ends: 72 [2020-11-07 06:35:28,951 INFO L226 Difference]: Without dead ends: 65 [2020-11-07 06:35:28,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=1075, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 06:35:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-07 06:35:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-11-07 06:35:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 06:35:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-11-07 06:35:28,969 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 59 [2020-11-07 06:35:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:28,969 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-11-07 06:35:28,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 06:35:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-11-07 06:35:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 06:35:28,970 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:28,971 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:28,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:35:28,971 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:28,972 INFO L82 PathProgramCache]: Analyzing trace with hash -84925470, now seen corresponding path program 5 times [2020-11-07 06:35:28,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:28,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112084782] [2020-11-07 06:35:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:28,992 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:29,005 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:29,033 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:35:29,033 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:35:29,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:35:29,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:35:29 BoogieIcfgContainer [2020-11-07 06:35:29,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:35:29,098 INFO L168 Benchmark]: Toolchain (without parser) took 7907.32 ms. Allocated memory was 163.6 MB in the beginning and 237.0 MB in the end (delta: 73.4 MB). Free memory was 148.1 MB in the beginning and 161.2 MB in the end (delta: -13.2 MB). Peak memory consumption was 60.7 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,099 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 163.6 MB. Free memory was 139.0 MB in the beginning and 138.9 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:35:29,100 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.62 ms. Allocated memory is still 163.6 MB. Free memory was 147.5 MB in the beginning and 138.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,101 INFO L168 Benchmark]: Boogie Preprocessor took 32.61 ms. Allocated memory is still 163.6 MB. Free memory was 138.2 MB in the beginning and 136.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,102 INFO L168 Benchmark]: RCFGBuilder took 397.01 ms. Allocated memory is still 163.6 MB. Free memory was 136.8 MB in the beginning and 135.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,103 INFO L168 Benchmark]: TraceAbstraction took 7229.90 ms. Allocated memory was 163.6 MB in the beginning and 237.0 MB in the end (delta: 73.4 MB). Free memory was 135.0 MB in the beginning and 161.2 MB in the end (delta: -26.2 MB). Peak memory consumption was 48.8 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 163.6 MB. Free memory was 139.0 MB in the beginning and 138.9 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.62 ms. Allocated memory is still 163.6 MB. Free memory was 147.5 MB in the beginning and 138.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.61 ms. Allocated memory is still 163.6 MB. Free memory was 138.2 MB in the beginning and 136.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 397.01 ms. Allocated memory is still 163.6 MB. Free memory was 136.8 MB in the beginning and 135.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7229.90 ms. Allocated memory was 163.6 MB in the beginning and 237.0 MB in the end (delta: 73.4 MB). Free memory was 135.0 MB in the beginning and 161.2 MB in the end (delta: -26.2 MB). Peak memory consumption was 48.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, sn=0; VAL [sn=0] [L24] i=1 VAL [i=1, sn=0] [L24] COND TRUE i<=8 VAL [i=1, sn=0] [L25] COND TRUE i<4 VAL [i=1, sn=0] [L26] sn = sn + (2) VAL [i=1, sn=2] [L24] i++ VAL [i=2, sn=2] [L24] COND TRUE i<=8 VAL [i=2, sn=2] [L25] COND TRUE i<4 VAL [i=2, sn=2] [L26] sn = sn + (2) VAL [i=2, sn=4] [L24] i++ VAL [i=3, sn=4] [L24] COND TRUE i<=8 VAL [i=3, sn=4] [L25] COND TRUE i<4 VAL [i=3, sn=4] [L26] sn = sn + (2) VAL [i=3, sn=6] [L24] i++ VAL [i=4, sn=6] [L24] COND TRUE i<=8 VAL [i=4, sn=6] [L25] COND FALSE !(i<4) VAL [i=4, sn=6] [L24] i++ VAL [i=5, sn=6] [L24] COND TRUE i<=8 VAL [i=5, sn=6] [L25] COND FALSE !(i<4) VAL [i=5, sn=6] [L24] i++ VAL [i=6, sn=6] [L24] COND TRUE i<=8 VAL [i=6, sn=6] [L25] COND FALSE !(i<4) VAL [i=6, sn=6] [L24] i++ VAL [i=7, sn=6] [L24] COND TRUE i<=8 VAL [i=7, sn=6] [L25] COND FALSE !(i<4) VAL [i=7, sn=6] [L24] i++ VAL [i=8, sn=6] [L24] COND TRUE i<=8 VAL [i=8, sn=6] [L25] COND FALSE !(i<4) VAL [i=8, sn=6] [L24] i++ VAL [i=9, sn=6] [L24] COND FALSE !(i<=8) VAL [i=9, sn=6] [L28] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum04-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 221 SDtfs, 443 SDslu, 756 SDs, 0 SdLazy, 895 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 20 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 411 NumberOfCodeBlocks, 411 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 338 ConstructedInterpolants, 0 QuantifiedInterpolants, 38038 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 0/324 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...