/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/sumt3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:02:21,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:02:21,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:02:21,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:02:21,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:02:21,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:02:21,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:02:21,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:02:21,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:02:21,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:02:21,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:02:21,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:02:21,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:02:21,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:02:21,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:02:21,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:02:21,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:02:21,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:02:21,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:02:21,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:02:21,184 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 22:02:21,204 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:02:21,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:02:21,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:02:21,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:02:21,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:02:21,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:02:21,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:02:21,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:02:21,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:02:21,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:02:21,211 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:02:21,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:02:21,212 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:02:21,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:02:21,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:02:21,213 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:02:21,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:02:21,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:02:21,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:02:21,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:02:21,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:02:21,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:02:21,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:02:21,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:02:21,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:02:21,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:02:21,695 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:02:21,696 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:02:21,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-10-23 22:02:21,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cfbbe237/fd6c56c1898a441d9667a53a4b892d32/FLAG391706bb0 [2020-10-23 22:02:22,313 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:02:22,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-10-23 22:02:22,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cfbbe237/fd6c56c1898a441d9667a53a4b892d32/FLAG391706bb0 [2020-10-23 22:02:22,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cfbbe237/fd6c56c1898a441d9667a53a4b892d32 [2020-10-23 22:02:22,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:02:22,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:02:22,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:22,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:02:22,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:02:22,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:22" (1/1) ... [2020-10-23 22:02:22,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a17b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:22, skipping insertion in model container [2020-10-23 22:02:22,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:22" (1/1) ... [2020-10-23 22:02:22,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:02:22,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:02:22,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:22,985 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:02:23,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:23,022 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:02:23,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23 WrapperNode [2020-10-23 22:02:23,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:23,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:02:23,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:02:23,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:02:23,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23" (1/1) ... [2020-10-23 22:02:23,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23" (1/1) ... [2020-10-23 22:02:23,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23" (1/1) ... [2020-10-23 22:02:23,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23" (1/1) ... [2020-10-23 22:02:23,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23" (1/1) ... [2020-10-23 22:02:23,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23" (1/1) ... [2020-10-23 22:02:23,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23" (1/1) ... [2020-10-23 22:02:23,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:02:23,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:02:23,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:02:23,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:02:23,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23" (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 22:02:23,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:02:23,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:02:23,150 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:02:23,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:02:23,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:02:23,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:02:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:02:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:02:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:02:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:02:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:02:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:02:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 22:02:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:02:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:02:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:02:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:02:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:02:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:02:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:02:23,653 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:02:23,654 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:02:23,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:23 BoogieIcfgContainer [2020-10-23 22:02:23,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:02:23,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:02:23,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:02:23,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:02:23,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:02:22" (1/3) ... [2020-10-23 22:02:23,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbfb8df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:23, skipping insertion in model container [2020-10-23 22:02:23,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:23" (2/3) ... [2020-10-23 22:02:23,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbfb8df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:23, skipping insertion in model container [2020-10-23 22:02:23,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:23" (3/3) ... [2020-10-23 22:02:23,665 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt3.c [2020-10-23 22:02:23,676 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:02:23,692 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:02:23,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:02:23,735 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:02:23,735 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:02:23,735 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:02:23,735 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:02:23,736 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:02:23,736 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:02:23,736 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:02:23,736 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:02:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-23 22:02:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 22:02:23,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:23,762 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] [2020-10-23 22:02:23,762 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:23,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2136131298, now seen corresponding path program 1 times [2020-10-23 22:02:23,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:23,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062550644] [2020-10-23 22:02:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:23,846 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:24,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:24,381 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 22:02:24,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062550644] [2020-10-23 22:02:24,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:24,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 22:02:24,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912956191] [2020-10-23 22:02:24,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 22:02:24,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 22:02:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:02:24,412 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 9 states. [2020-10-23 22:02:25,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:25,329 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-10-23 22:02:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 22:02:25,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-23 22:02:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:25,341 INFO L225 Difference]: With dead ends: 80 [2020-10-23 22:02:25,341 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 22:02:25,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-23 22:02:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 22:02:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-23 22:02:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 22:02:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-23 22:02:25,404 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-10-23 22:02:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:25,404 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-23 22:02:25,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 22:02:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-23 22:02:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 22:02:25,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:25,406 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] [2020-10-23 22:02:25,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:02:25,407 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:25,408 INFO L82 PathProgramCache]: Analyzing trace with hash -609275412, now seen corresponding path program 1 times [2020-10-23 22:02:25,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:25,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140903395] [2020-10-23 22:02:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:26,178 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-23 22:02:26,196 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:26,200 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:26,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:26,770 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 22:02:26,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140903395] [2020-10-23 22:02:26,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:26,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 22:02:26,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234804738] [2020-10-23 22:02:26,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 22:02:26,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 22:02:26,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-23 22:02:26,774 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 13 states. [2020-10-23 22:02:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:27,461 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-10-23 22:02:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 22:02:27,461 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-23 22:02:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:27,463 INFO L225 Difference]: With dead ends: 54 [2020-10-23 22:02:27,464 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 22:02:27,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-10-23 22:02:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 22:02:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2020-10-23 22:02:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 22:02:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-23 22:02:27,482 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 35 [2020-10-23 22:02:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:27,483 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-23 22:02:27,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 22:02:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-23 22:02:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 22:02:27,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:27,485 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] [2020-10-23 22:02:27,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:02:27,485 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:27,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:27,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2142497862, now seen corresponding path program 2 times [2020-10-23 22:02:27,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:27,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648851123] [2020-10-23 22:02:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:28,147 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-23 22:02:31,153 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2020-10-23 22:02:33,277 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:02:35,381 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:02:41,480 WARN L193 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 3247 DAG size of output: 123 [2020-10-23 22:02:42,250 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-23 22:02:42,255 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:42,258 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:42,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:42,719 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 22:02:42,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648851123] [2020-10-23 22:02:42,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:42,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 22:02:42,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36489179] [2020-10-23 22:02:42,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 22:02:42,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 22:02:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:02:42,728 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 9 states. [2020-10-23 22:02:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:47,388 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-23 22:02:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 22:02:47,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-23 22:02:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:47,391 INFO L225 Difference]: With dead ends: 58 [2020-10-23 22:02:47,391 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 22:02:47,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-23 22:02:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 22:02:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-23 22:02:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 22:02:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-23 22:02:47,411 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2020-10-23 22:02:47,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:47,413 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-23 22:02:47,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 22:02:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-23 22:02:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 22:02:47,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:47,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:02:47,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:02:47,418 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1785635382, now seen corresponding path program 1 times [2020-10-23 22:02:47,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:47,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656897105] [2020-10-23 22:02:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:48,179 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-23 22:02:50,291 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:02:52,292 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 920 DAG size of output: 96 [2020-10-23 22:02:54,387 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:02:56,128 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2020-10-23 22:02:59,197 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 2937 DAG size of output: 97 [2020-10-23 22:02:59,202 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:59,204 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:59,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:59,715 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 22:02:59,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656897105] [2020-10-23 22:02:59,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:59,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 22:02:59,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878437172] [2020-10-23 22:02:59,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 22:02:59,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 22:02:59,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-23 22:02:59,718 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 15 states. [2020-10-23 22:03:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:00,657 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-10-23 22:03:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 22:03:00,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-23 22:03:00,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:00,660 INFO L225 Difference]: With dead ends: 60 [2020-10-23 22:03:00,660 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 22:03:00,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-10-23 22:03:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 22:03:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-23 22:03:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 22:03:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-23 22:03:00,694 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 40 [2020-10-23 22:03:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:00,695 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-23 22:03:00,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 22:03:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-23 22:03:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 22:03:00,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:00,696 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:00,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:03:00,697 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:00,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1979567766, now seen corresponding path program 1 times [2020-10-23 22:03:00,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:00,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639305384] [2020-10-23 22:03:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:01,485 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-23 22:03:03,659 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 919 DAG size of output: 95 [2020-10-23 22:03:05,753 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:03:07,836 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:03:10,343 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 1231 DAG size of output: 128 [2020-10-23 22:03:11,284 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-23 22:03:11,287 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:03:11,288 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:11,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:11,425 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 22:03:11,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639305384] [2020-10-23 22:03:11,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:11,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:03:11,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861011627] [2020-10-23 22:03:11,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:03:11,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:03:11,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:03:11,431 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2020-10-23 22:03:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:11,639 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-23 22:03:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:03:11,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-10-23 22:03:11,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:11,641 INFO L225 Difference]: With dead ends: 61 [2020-10-23 22:03:11,642 INFO L226 Difference]: Without dead ends: 48 [2020-10-23 22:03:11,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 22:03:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-23 22:03:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-23 22:03:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 22:03:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-23 22:03:11,659 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 40 [2020-10-23 22:03:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:11,659 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-23 22:03:11,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:03:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-23 22:03:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 22:03:11,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:11,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-23 22:03:11,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:03:11,661 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash -974762236, now seen corresponding path program 2 times [2020-10-23 22:03:11,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:11,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873238882] [2020-10-23 22:03:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:13,136 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2020-10-23 22:03:15,223 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:03:17,304 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:03:20,121 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 2936 DAG size of output: 96 [2020-10-23 22:03:26,347 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-23 22:03:34,642 WARN L193 SmtUtils]: Spent 8.29 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-23 22:03:54,803 WARN L193 SmtUtils]: Spent 20.12 s on a formula simplification. DAG size of input: 10297 DAG size of output: 126 [2020-10-23 22:03:56,897 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:03:58,981 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:04:00,510 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 179 DAG size of output: 128 [2020-10-23 22:04:01,294 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-23 22:04:03,383 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:04:04,354 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-23 22:04:16,780 WARN L193 SmtUtils]: Spent 12.42 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-23 22:04:37,507 WARN L193 SmtUtils]: Spent 20.70 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-23 22:11:32,115 WARN L193 SmtUtils]: Spent 6.90 m on a formula simplification. DAG size of input: 26289 DAG size of output: 148 [2020-10-23 22:11:32,120 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:11:32,121 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:11:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:32,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:11:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:11:32,443 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 22:11:32,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873238882] [2020-10-23 22:11:32,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:11:32,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 22:11:32,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207574907] [2020-10-23 22:11:32,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 22:11:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:11:32,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 22:11:32,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:11:32,450 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 7 states. [2020-10-23 22:11:32,785 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-23 22:11:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:11:37,397 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-10-23 22:11:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 22:11:37,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-23 22:11:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:11:37,399 INFO L225 Difference]: With dead ends: 67 [2020-10-23 22:11:37,399 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 22:11:37,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-23 22:11:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 22:11:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-23 22:11:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 22:11:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-23 22:11:37,418 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2020-10-23 22:11:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:11:37,418 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-23 22:11:37,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 22:11:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-23 22:11:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 22:11:37,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:11:37,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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 22:11:37,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 22:11:37,420 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:11:37,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:11:37,420 INFO L82 PathProgramCache]: Analyzing trace with hash -669265876, now seen corresponding path program 3 times [2020-10-23 22:11:37,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:11:37,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468928386] [2020-10-23 22:11:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:11:38,353 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-23 22:11:40,461 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:11:42,566 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:11:43,603 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-23 22:11:44,689 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-23 22:11:46,852 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:11:47,903 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-23 22:11:50,025 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-23 22:11:52,280 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 186 DAG size of output: 112 [2020-10-23 22:11:54,390 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:11:56,497 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:11:58,475 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2020-10-23 22:12:00,590 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:12:02,697 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:12:03,768 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-23 22:12:03,770 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:12:03,771 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:12:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:12:03,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:12:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:12:03,915 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 22:12:03,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468928386] [2020-10-23 22:12:03,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:12:03,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:12:03,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760314384] [2020-10-23 22:12:03,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:12:03,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:12:03,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:12:03,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:12:03,918 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 6 states. [2020-10-23 22:12:04,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:12:04,296 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-10-23 22:12:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:12:04,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-23 22:12:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:12:04,302 INFO L225 Difference]: With dead ends: 65 [2020-10-23 22:12:04,302 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 22:12:04,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:12:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 22:12:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-23 22:12:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 22:12:04,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-23 22:12:04,326 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2020-10-23 22:12:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:12:04,326 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-23 22:12:04,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:12:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-23 22:12:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 22:12:04,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:12:04,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-23 22:12:04,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 22:12:04,328 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:12:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:12:04,329 INFO L82 PathProgramCache]: Analyzing trace with hash -475333492, now seen corresponding path program 1 times [2020-10-23 22:12:04,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:12:04,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032117801] [2020-10-23 22:12:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:12:07,278 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2020-10-23 22:12:08,392 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2020-10-23 22:12:10,507 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:12:11,594 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-23 22:12:12,697 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-23 22:12:14,832 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-23 22:12:21,113 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-23 22:12:22,928 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 186 DAG size of output: 126 [2020-10-23 22:12:25,036 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:12:27,143 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:12:29,154 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2020-10-23 22:12:31,268 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:12:33,377 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:12:34,460 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-23 22:12:38,000 WARN L193 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 2936 DAG size of output: 96 [2020-10-23 22:12:38,001 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:12:38,003 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:12:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:12:38,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:12:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:12:38,711 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 22:12:38,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032117801] [2020-10-23 22:12:38,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:12:38,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 22:12:38,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060000686] [2020-10-23 22:12:38,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 22:12:38,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:12:38,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 22:12:38,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-23 22:12:38,714 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 17 states. [2020-10-23 22:12:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:12:40,227 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-23 22:12:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 22:12:40,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-23 22:12:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:12:40,230 INFO L225 Difference]: With dead ends: 64 [2020-10-23 22:12:40,230 INFO L226 Difference]: Without dead ends: 58 [2020-10-23 22:12:40,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2020-10-23 22:12:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-23 22:12:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-23 22:12:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 22:12:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-23 22:12:40,247 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 45 [2020-10-23 22:12:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:12:40,247 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-23 22:12:40,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 22:12:40,247 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-23 22:12:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-23 22:12:40,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:12:40,249 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-23 22:12:40,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 22:12:40,250 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:12:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:12:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash 975277658, now seen corresponding path program 2 times [2020-10-23 22:12:40,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:12:40,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288879223] [2020-10-23 22:12:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:12:41,173 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-23 22:12:43,690 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 919 DAG size of output: 95 [2020-10-23 22:12:47,414 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification. DAG size of input: 2936 DAG size of output: 96 [2020-10-23 22:12:48,568 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-23 22:12:52,775 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-23 22:12:54,921 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-23 22:12:56,780 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 186 DAG size of output: 126 [2020-10-23 22:12:58,891 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:13:01,000 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:13:03,143 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2020-10-23 22:13:07,397 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:13:09,025 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 185 DAG size of output: 112 [2020-10-23 22:13:11,613 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 2918 DAG size of output: 90 [2020-10-23 22:13:12,819 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-23 22:13:13,971 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-23 22:14:51,714 WARN L193 SmtUtils]: Spent 1.63 m on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-23 22:15:20,747 WARN L193 SmtUtils]: Spent 29.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-10-23 22:15:51,996 WARN L193 SmtUtils]: Spent 31.16 s on a formula simplification. DAG size of input: 12625 DAG size of output: 119 [2020-10-23 22:15:51,998 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:15:52,000 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:15:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:52,833 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-10-23 22:15:53,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:15:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:53,157 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 22:15:53,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288879223] [2020-10-23 22:15:53,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:15:53,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-10-23 22:15:53,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529457704] [2020-10-23 22:15:53,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 22:15:53,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:15:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 22:15:53,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-10-23 22:15:53,162 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 19 states. [2020-10-23 22:15:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:15:55,152 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-10-23 22:15:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 22:15:55,153 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-10-23 22:15:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:15:55,154 INFO L225 Difference]: With dead ends: 71 [2020-10-23 22:15:55,155 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 22:15:55,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 22:15:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 22:15:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-23 22:15:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-23 22:15:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-23 22:15:55,178 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 49 [2020-10-23 22:15:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:15:55,178 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-23 22:15:55,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 22:15:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-23 22:15:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 22:15:55,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:15:55,180 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:15:55,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 22:15:55,180 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:15:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:15:55,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1816037672, now seen corresponding path program 3 times [2020-10-23 22:15:55,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:15:55,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253871901] [2020-10-23 22:15:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:15:57,715 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 2917 DAG size of output: 89 [2020-10-23 22:16:00,670 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 919 DAG size of output: 95 [2020-10-23 22:16:02,780 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:16:04,892 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:16:06,214 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-23 22:16:07,514 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-10-23 22:16:09,651 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-23 22:16:15,911 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-23 22:16:18,507 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 186 DAG size of output: 112 [2020-10-23 22:16:20,613 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:16:22,720 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 22:16:25,161 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2020-10-23 22:16:27,341 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-23 22:16:28,819 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 185 DAG size of output: 96 [2020-10-23 22:16:29,942 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-23 22:16:33,048 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 921 DAG size of output: 97 [2020-10-23 22:16:34,398 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2020-10-23 22:16:38,265 WARN L193 SmtUtils]: Spent 3.80 s on a formula simplification. DAG size of input: 2918 DAG size of output: 90