/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/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:02:40,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:02:40,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:02:40,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:02:40,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:02:40,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:02:40,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:02:40,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:02:40,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:02:40,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:02:40,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:02:40,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:02:40,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:02:40,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:02:40,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:02:40,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:02:40,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:02:40,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:02:40,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:02:40,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:02:40,218 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 22:02:40,242 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:02:40,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:02:40,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:02:40,247 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:02:40,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:02:40,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:02:40,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:02:40,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:02:40,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:02:40,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:02:40,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:02:40,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:02:40,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:02:40,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:02:40,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:02:40,251 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:02:40,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:02:40,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:02:40,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:02:40,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:02:40,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:02:40,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:02:40,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:02:40,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:02:40,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:02:40,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:02:40,717 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:02:40,718 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:02:40,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-10-23 22:02:40,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/302e8ef7b/dd6481538f74482b9e843014191745cb/FLAG8c4bcf6e9 [2020-10-23 22:02:41,424 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:02:41,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-10-23 22:02:41,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/302e8ef7b/dd6481538f74482b9e843014191745cb/FLAG8c4bcf6e9 [2020-10-23 22:02:41,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/302e8ef7b/dd6481538f74482b9e843014191745cb [2020-10-23 22:02:41,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:02:41,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:02:41,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:41,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:02:41,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:02:41,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:41" (1/1) ... [2020-10-23 22:02:41,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73bf27c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:41, skipping insertion in model container [2020-10-23 22:02:41,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:41" (1/1) ... [2020-10-23 22:02:41,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:02:41,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:02:42,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:42,106 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:02:42,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:42,154 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:02:42,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42 WrapperNode [2020-10-23 22:02:42,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:42,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:02:42,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:02:42,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:02:42,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42" (1/1) ... [2020-10-23 22:02:42,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42" (1/1) ... [2020-10-23 22:02:42,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42" (1/1) ... [2020-10-23 22:02:42,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42" (1/1) ... [2020-10-23 22:02:42,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42" (1/1) ... [2020-10-23 22:02:42,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42" (1/1) ... [2020-10-23 22:02:42,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42" (1/1) ... [2020-10-23 22:02:42,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:02:42,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:02:42,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:02:42,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:02:42,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42" (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 22:02:42,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:02:42,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:02:42,352 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:02:42,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:02:42,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:02:42,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:02:42,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:02:42,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:02:42,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:02:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:02:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:02:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:02:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:02:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:02:42,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:02:42,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:02:42,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:02:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:02:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:02:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:02:42,932 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:02:42,932 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:02:42,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:42 BoogieIcfgContainer [2020-10-23 22:02:42,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:02:42,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:02:42,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:02:42,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:02:42,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:02:41" (1/3) ... [2020-10-23 22:02:42,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e072aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:42, skipping insertion in model container [2020-10-23 22:02:42,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:42" (2/3) ... [2020-10-23 22:02:42,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e072aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:42, skipping insertion in model container [2020-10-23 22:02:42,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:42" (3/3) ... [2020-10-23 22:02:42,946 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2020-10-23 22:02:42,958 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:02:42,964 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:02:42,982 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:02:43,003 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:02:43,004 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:02:43,004 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:02:43,004 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:02:43,004 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:02:43,004 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:02:43,004 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:02:43,004 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:02:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-10-23 22:02:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 22:02:43,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:43,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:43,031 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:43,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1693041709, now seen corresponding path program 1 times [2020-10-23 22:02:43,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:43,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593275406] [2020-10-23 22:02:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:43,120 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:43,896 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-10-23 22:02:43,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:44,040 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 22:02:44,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593275406] [2020-10-23 22:02:44,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:44,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 22:02:44,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989019124] [2020-10-23 22:02:44,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 22:02:44,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:44,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 22:02:44,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-23 22:02:44,072 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 16 states. [2020-10-23 22:02:45,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:45,706 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2020-10-23 22:02:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 22:02:45,708 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-23 22:02:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:45,720 INFO L225 Difference]: With dead ends: 185 [2020-10-23 22:02:45,720 INFO L226 Difference]: Without dead ends: 131 [2020-10-23 22:02:45,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2020-10-23 22:02:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-23 22:02:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 61. [2020-10-23 22:02:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 22:02:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-10-23 22:02:45,797 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 36 [2020-10-23 22:02:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:45,798 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-10-23 22:02:45,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 22:02:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-10-23 22:02:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 22:02:45,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:45,801 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:45,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:02:45,802 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash -184005851, now seen corresponding path program 1 times [2020-10-23 22:02:45,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:45,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521998325] [2020-10-23 22:02:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:47,909 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 36 [2020-10-23 22:02:48,058 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-23 22:02:52,604 WARN L193 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 202 DAG size of output: 193 [2020-10-23 22:02:59,167 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 533 DAG size of output: 259 [2020-10-23 22:03:07,436 WARN L193 SmtUtils]: Spent 8.26 s on a formula simplification that was a NOOP. DAG size: 36 [2020-10-23 22:03:38,312 WARN L193 SmtUtils]: Spent 30.87 s on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-23 22:03:42,741 WARN L193 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 202 DAG size of output: 202 [2020-10-23 22:03:44,907 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-23 22:03:49,435 WARN L193 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 202 DAG size of output: 193 [2020-10-23 22:03:49,448 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:49,450 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:49,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:49,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-23 22:03:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:49,612 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 22:03:49,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521998325] [2020-10-23 22:03:49,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:49,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:03:49,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290600158] [2020-10-23 22:03:49,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:03:49,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:49,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:03:49,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:03:49,616 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 5 states. [2020-10-23 22:03:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:50,052 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2020-10-23 22:03:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:03:50,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-23 22:03:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:50,058 INFO L225 Difference]: With dead ends: 102 [2020-10-23 22:03:50,059 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 22:03:50,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:03:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 22:03:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2020-10-23 22:03:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 22:03:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-23 22:03:50,104 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 45 [2020-10-23 22:03:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:50,105 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-23 22:03:50,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:03:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-23 22:03:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 22:03:50,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:50,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:50,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:03:50,108 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 7172381, now seen corresponding path program 1 times [2020-10-23 22:03:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:50,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934908718] [2020-10-23 22:03:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:50,296 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-23 22:03:55,861 WARN L193 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 216 DAG size of output: 216 [2020-10-23 22:04:00,088 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-23 22:04:08,329 WARN L193 SmtUtils]: Spent 8.23 s on a formula simplification. DAG size of input: 475 DAG size of output: 204 [2020-10-23 22:04:16,590 WARN L193 SmtUtils]: Spent 8.25 s on a formula simplification that was a NOOP. DAG size: 36 [2020-10-23 22:04:43,398 WARN L193 SmtUtils]: Spent 26.81 s on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-23 22:04:48,001 WARN L193 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 202 DAG size of output: 202 [2020-10-23 22:04:48,007 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:04:48,009 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:04:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:48,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:04:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:48,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-23 22:04:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:04:48,333 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 22:04:48,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934908718] [2020-10-23 22:04:48,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:04:48,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:04:48,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86326598] [2020-10-23 22:04:48,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:04:48,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:04:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:04:48,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:04:48,340 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 5 states. [2020-10-23 22:04:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:04:48,846 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-10-23 22:04:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:04:48,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-23 22:04:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:04:48,849 INFO L225 Difference]: With dead ends: 101 [2020-10-23 22:04:48,849 INFO L226 Difference]: Without dead ends: 76 [2020-10-23 22:04:48,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:04:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-23 22:04:48,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-10-23 22:04:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-23 22:04:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-23 22:04:48,893 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 46 [2020-10-23 22:04:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:04:48,894 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-23 22:04:48,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:04:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-23 22:04:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 22:04:48,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:04:48,900 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:04:48,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:04:48,900 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:04:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:04:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1626182229, now seen corresponding path program 1 times [2020-10-23 22:04:48,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:04:48,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79522284] [2020-10-23 22:04:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:04:51,231 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-23 22:05:05,931 WARN L193 SmtUtils]: Spent 14.66 s on a formula simplification. DAG size of input: 3299 DAG size of output: 222 [2020-10-23 22:05:08,020 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-23 22:05:16,361 WARN L193 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-23 22:05:23,307 WARN L193 SmtUtils]: Spent 6.94 s on a formula simplification. DAG size of input: 533 DAG size of output: 232 [2020-10-23 22:05:35,664 WARN L193 SmtUtils]: Spent 12.35 s on a formula simplification that was a NOOP. DAG size: 36 [2020-10-23 22:05:56,278 WARN L193 SmtUtils]: Spent 20.61 s on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-23 22:06:00,948 WARN L193 SmtUtils]: Spent 4.67 s on a formula simplification. DAG size of input: 202 DAG size of output: 202 [2020-10-23 22:06:00,952 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:06:00,954 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:01,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:01,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-23 22:06:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:01,184 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 22:06:01,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79522284] [2020-10-23 22:06:01,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:01,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:06:01,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611418092] [2020-10-23 22:06:01,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:06:01,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:06:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:06:01,187 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 5 states. [2020-10-23 22:06:01,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:06:01,843 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-10-23 22:06:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:06:01,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-23 22:06:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:06:01,845 INFO L225 Difference]: With dead ends: 91 [2020-10-23 22:06:01,846 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 22:06:01,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:06:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 22:06:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-23 22:06:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 22:06:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-23 22:06:01,883 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 47 [2020-10-23 22:06:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:06:01,883 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-23 22:06:01,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:06:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-23 22:06:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 22:06:01,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:06:01,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:06:01,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:06:01,895 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:06:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:06:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash 309487203, now seen corresponding path program 1 times [2020-10-23 22:06:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:06:01,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896330872] [2020-10-23 22:06:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:06:02,268 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-23 22:06:06,685 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 55 DAG size of output: 49