/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:58:46,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:58:46,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:58:46,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:58:46,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:58:46,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:58:46,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:58:46,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:58:46,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:58:46,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:58:46,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:58:46,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:58:46,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:58:46,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:58:46,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:58:46,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:58:46,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:58:46,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:58:46,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:58:46,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:58:46,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:58:46,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:58:46,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:58:46,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:58:46,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:58:46,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:58:46,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:58:46,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:58:46,261 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 01:58:46,284 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:58:46,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:58:46,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:58:46,286 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:58:46,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:58:46,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:58:46,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:58:46,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:58:46,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:58:46,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:58:46,288 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:58:46,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:58:46,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:58:46,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:58:46,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:58:46,289 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:58:46,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:58:46,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:58:46,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:58:46,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:58:46,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:58:46,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:58:46,290 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:58:46,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:58:46,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:58:46,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:58:46,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:58:46,726 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:58:46,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-11-07 01:58:46,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789009c75/687ccf1640f3416ebaa3d89c84eeecd9/FLAG825eb974e [2020-11-07 01:58:47,484 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:58:47,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-11-07 01:58:47,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789009c75/687ccf1640f3416ebaa3d89c84eeecd9/FLAG825eb974e [2020-11-07 01:58:47,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789009c75/687ccf1640f3416ebaa3d89c84eeecd9 [2020-11-07 01:58:47,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:58:47,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:58:47,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:47,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:58:47,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:58:47,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:47" (1/1) ... [2020-11-07 01:58:47,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47293faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:47, skipping insertion in model container [2020-11-07 01:58:47,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:47" (1/1) ... [2020-11-07 01:58:47,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:58:47,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:58:48,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:48,082 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:58:48,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:58:48,116 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:58:48,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48 WrapperNode [2020-11-07 01:58:48,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:58:48,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:58:48,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:58:48,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:58:48,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (1/1) ... [2020-11-07 01:58:48,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:58:48,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:58:48,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:58:48,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:58:48,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (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 01:58:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:58:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:58:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:58:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:58:48,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:58:48,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:58:48,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:58:48,234 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:58:48,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:58:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:58:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:58:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:58:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:58:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:58:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:58:48,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:58:48,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:58:48,644 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:58:48,645 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 01:58:48,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:48 BoogieIcfgContainer [2020-11-07 01:58:48,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:58:48,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:58:48,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:58:48,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:58:48,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:47" (1/3) ... [2020-11-07 01:58:48,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eef276f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:48, skipping insertion in model container [2020-11-07 01:58:48,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:48" (2/3) ... [2020-11-07 01:58:48,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eef276f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:48, skipping insertion in model container [2020-11-07 01:58:48,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:48" (3/3) ... [2020-11-07 01:58:48,667 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-11-07 01:58:48,686 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:58:48,691 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:58:48,707 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:58:48,753 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:58:48,753 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:58:48,753 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:58:48,754 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:58:48,754 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:58:48,754 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:58:48,754 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:58:48,754 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:58:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-11-07 01:58:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-07 01:58:48,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:48,860 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] [2020-11-07 01:58:48,860 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:48,874 INFO L82 PathProgramCache]: Analyzing trace with hash -772490682, now seen corresponding path program 1 times [2020-11-07 01:58:48,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:48,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134752392] [2020-11-07 01:58:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:48,983 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:49,224 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 01:58:49,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134752392] [2020-11-07 01:58:49,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:49,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 01:58:49,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721545703] [2020-11-07 01:58:49,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 01:58:49,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:49,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 01:58:49,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 01:58:49,254 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-11-07 01:58:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:49,422 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-11-07 01:58:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 01:58:49,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-07 01:58:49,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:49,433 INFO L225 Difference]: With dead ends: 50 [2020-11-07 01:58:49,433 INFO L226 Difference]: Without dead ends: 29 [2020-11-07 01:58:49,437 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 01:58:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-07 01:58:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-11-07 01:58:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-07 01:58:49,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-11-07 01:58:49,487 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 20 [2020-11-07 01:58:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:49,488 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-11-07 01:58:49,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 01:58:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-11-07 01:58:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 01:58:49,490 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:49,490 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] [2020-11-07 01:58:49,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:58:49,490 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:49,491 INFO L82 PathProgramCache]: Analyzing trace with hash 515607529, now seen corresponding path program 1 times [2020-11-07 01:58:49,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:49,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040677327] [2020-11-07 01:58:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY