/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/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:47:32,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:47:32,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:47:32,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:47:32,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:47:32,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:47:32,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:47:32,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:47:32,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:47:32,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:47:32,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:47:32,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:47:32,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:47:32,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:47:32,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:47:32,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:47:32,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:47:32,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:47:32,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:47:32,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:47:32,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:47:32,289 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:47:32,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:47:32,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:47:32,299 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:47:32,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:47:32,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:47:32,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:47:32,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:47:32,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:47:32,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:47:32,300 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:47:32,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:47:32,301 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:47:32,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:47:32,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:47:32,301 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:47:32,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:47:32,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:47:32,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:47:32,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:47:32,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:47:32,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:47:32,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:47:32,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:47:32,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:47:32,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:47:32,688 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:47:32,689 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:47:32,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-10-23 21:47:32,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e11ba7d/013a0e4782c04801b4e92ef6fcf83c95/FLAGfe6f12e5f [2020-10-23 21:47:33,464 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:47:33,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-10-23 21:47:33,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e11ba7d/013a0e4782c04801b4e92ef6fcf83c95/FLAGfe6f12e5f [2020-10-23 21:47:33,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48e11ba7d/013a0e4782c04801b4e92ef6fcf83c95 [2020-10-23 21:47:33,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:47:33,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:47:33,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:33,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:47:33,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:47:33,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:33" (1/1) ... [2020-10-23 21:47:33,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6914a8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:33, skipping insertion in model container [2020-10-23 21:47:33,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:33" (1/1) ... [2020-10-23 21:47:33,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:47:33,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:47:34,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:34,101 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:47:34,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:34,132 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:47:34,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34 WrapperNode [2020-10-23 21:47:34,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:34,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:47:34,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:47:34,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:47:34,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34" (1/1) ... [2020-10-23 21:47:34,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34" (1/1) ... [2020-10-23 21:47:34,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34" (1/1) ... [2020-10-23 21:47:34,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34" (1/1) ... [2020-10-23 21:47:34,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34" (1/1) ... [2020-10-23 21:47:34,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34" (1/1) ... [2020-10-23 21:47:34,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34" (1/1) ... [2020-10-23 21:47:34,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:47:34,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:47:34,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:47:34,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:47:34,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:47:34,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:47:34,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:47:34,250 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:47:34,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:47:34,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:47:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:47:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:47:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:47:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:47:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:47:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:47:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:47:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:47:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:47:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:47:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:47:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:47:34,500 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:47:34,500 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:47:34,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:34 BoogieIcfgContainer [2020-10-23 21:47:34,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:47:34,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:47:34,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:47:34,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:47:34,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:47:33" (1/3) ... [2020-10-23 21:47:34,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110a7315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:34, skipping insertion in model container [2020-10-23 21:47:34,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:34" (2/3) ... [2020-10-23 21:47:34,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110a7315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:34, skipping insertion in model container [2020-10-23 21:47:34,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:34" (3/3) ... [2020-10-23 21:47:34,511 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-10-23 21:47:34,539 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:47:34,544 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:47:34,558 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:47:34,583 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:47:34,583 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:47:34,583 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:47:34,583 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:47:34,583 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:47:34,584 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:47:34,584 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:47:34,584 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:47:34,601 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-23 21:47:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 21:47:34,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:34,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:47:34,612 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:34,618 INFO L82 PathProgramCache]: Analyzing trace with hash -213878533, now seen corresponding path program 1 times [2020-10-23 21:47:34,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:34,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13409352] [2020-10-23 21:47:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:34,702 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:35,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13409352] [2020-10-23 21:47:35,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:35,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 21:47:35,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249806341] [2020-10-23 21:47:35,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 21:47:35,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 21:47:35,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:47:35,123 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-10-23 21:47:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:35,407 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-23 21:47:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 21:47:35,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-23 21:47:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:35,425 INFO L225 Difference]: With dead ends: 44 [2020-10-23 21:47:35,425 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 21:47:35,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:47:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 21:47:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-23 21:47:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-23 21:47:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-23 21:47:35,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-23 21:47:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:35,504 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-23 21:47:35,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 21:47:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-23 21:47:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 21:47:35,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:35,507 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] [2020-10-23 21:47:35,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:47:35,508 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1892947140, now seen corresponding path program 1 times [2020-10-23 21:47:35,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:35,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191855102] [2020-10-23 21:47:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY