/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/recursive-simple/fibo_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:53:41,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:53:41,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:53:41,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:53:41,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:53:41,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:53:41,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:53:41,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:53:41,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:53:41,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:53:41,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:53:41,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:53:41,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:53:41,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:53:41,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:53:41,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:53:41,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:53:41,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:53:41,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:53:41,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:53:41,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:53:41,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:53:41,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:53:41,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:53:41,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:53:41,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:53:41,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:53:41,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:53:41,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:53:41,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:53:41,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:53:41,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:53:41,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:53:41,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:53:41,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:53:41,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:53:41,634 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:53:41,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:53:41,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:53:41,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:53:41,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:53:41,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:53:41,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:53:41,635 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:53:42,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:53:42,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:53:42,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:53:42,081 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:53:42,081 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:53:42,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2021-02-23 17:53:42,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/073f0f4cc/a986104f74f14d9bae2abad54cdcecd2/FLAG605ede3bc [2021-02-23 17:53:42,784 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:53:42,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2021-02-23 17:53:42,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/073f0f4cc/a986104f74f14d9bae2abad54cdcecd2/FLAG605ede3bc [2021-02-23 17:53:43,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/073f0f4cc/a986104f74f14d9bae2abad54cdcecd2 [2021-02-23 17:53:43,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:53:43,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:53:43,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:53:43,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:53:43,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:53:43,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:53:43" (1/1) ... [2021-02-23 17:53:43,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1768dba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43, skipping insertion in model container [2021-02-23 17:53:43,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:53:43" (1/1) ... [2021-02-23 17:53:43,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:53:43,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:53:43,363 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c[946,959] [2021-02-23 17:53:43,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:53:43,379 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:53:43,398 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c[946,959] [2021-02-23 17:53:43,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:53:43,417 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:53:43,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43 WrapperNode [2021-02-23 17:53:43,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:53:43,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:53:43,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:53:43,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:53:43,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43" (1/1) ... [2021-02-23 17:53:43,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43" (1/1) ... [2021-02-23 17:53:43,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43" (1/1) ... [2021-02-23 17:53:43,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43" (1/1) ... [2021-02-23 17:53:43,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43" (1/1) ... [2021-02-23 17:53:43,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43" (1/1) ... [2021-02-23 17:53:43,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43" (1/1) ... [2021-02-23 17:53:43,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:53:43,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:53:43,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:53:43,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:53:43,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43" (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 [2021-02-23 17:53:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:53:43,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:53:43,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:53:43,644 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-02-23 17:53:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-02-23 17:53:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:53:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:53:43,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:53:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:53:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:53:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:53:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-02-23 17:53:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-02-23 17:53:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:53:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:53:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:53:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:53:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:53:43,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:53:43,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:53:44,179 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:53:44,181 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:53:44,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:53:44 BoogieIcfgContainer [2021-02-23 17:53:44,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:53:44,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:53:44,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:53:44,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:53:44,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:53:43" (1/3) ... [2021-02-23 17:53:44,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200debc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:53:44, skipping insertion in model container [2021-02-23 17:53:44,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:53:43" (2/3) ... [2021-02-23 17:53:44,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200debc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:53:44, skipping insertion in model container [2021-02-23 17:53:44,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:53:44" (3/3) ... [2021-02-23 17:53:44,199 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2021-02-23 17:53:44,211 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:53:44,216 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:53:44,239 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:53:44,278 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:53:44,278 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:53:44,278 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:53:44,278 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:53:44,279 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:53:44,279 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:53:44,279 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:53:44,279 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:53:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-23 17:53:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 17:53:44,319 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:44,320 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] [2021-02-23 17:53:44,321 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:44,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2042570277, now seen corresponding path program 1 times [2021-02-23 17:53:44,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:44,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055252145] [2021-02-23 17:53:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:44,440 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:44,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:44,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:44,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:44,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:44,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:44,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:44,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:44,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:44,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:44,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:44,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:44,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:44,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:44,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:44,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:44,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:53:44,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055252145] [2021-02-23 17:53:44,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:44,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:53:44,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504479045] [2021-02-23 17:53:44,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:53:44,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:53:44,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:53:44,824 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2021-02-23 17:53:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:45,304 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-02-23 17:53:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:53:45,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-23 17:53:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:45,321 INFO L225 Difference]: With dead ends: 70 [2021-02-23 17:53:45,321 INFO L226 Difference]: Without dead ends: 50 [2021-02-23 17:53:45,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:53:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-23 17:53:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-23 17:53:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 17:53:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-23 17:53:45,411 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2021-02-23 17:53:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:45,412 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-23 17:53:45,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:53:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-23 17:53:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 17:53:45,416 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:45,416 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] [2021-02-23 17:53:45,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:53:45,417 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash -589714176, now seen corresponding path program 1 times [2021-02-23 17:53:45,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:45,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418470130] [2021-02-23 17:53:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:45,433 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:45,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:45,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:45,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:45,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:45,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:45,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:45,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:45,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:45,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:45,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:45,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:45,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:45,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:45,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:45,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:45,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:53:45,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418470130] [2021-02-23 17:53:45,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:45,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:53:45,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105100926] [2021-02-23 17:53:45,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:53:45,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:45,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:53:45,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:53:45,681 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2021-02-23 17:53:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:46,046 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-23 17:53:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:53:46,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-23 17:53:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:46,049 INFO L225 Difference]: With dead ends: 58 [2021-02-23 17:53:46,049 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 17:53:46,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:53:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 17:53:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-23 17:53:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 17:53:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-23 17:53:46,070 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2021-02-23 17:53:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:46,071 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-23 17:53:46,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:53:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-23 17:53:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-23 17:53:46,073 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:46,073 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] [2021-02-23 17:53:46,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:53:46,074 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash -374229603, now seen corresponding path program 1 times [2021-02-23 17:53:46,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:46,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097305481] [2021-02-23 17:53:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:46,078 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,170 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 17:53:46,171 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 17:53:46,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:53:46,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:46,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:46,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-23 17:53:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 17:53:46,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097305481] [2021-02-23 17:53:46,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:46,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 17:53:46,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578016428] [2021-02-23 17:53:46,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 17:53:46,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:46,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 17:53:46,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:53:46,224 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 7 states. [2021-02-23 17:53:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:46,575 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-02-23 17:53:46,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:53:46,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2021-02-23 17:53:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:46,584 INFO L225 Difference]: With dead ends: 90 [2021-02-23 17:53:46,584 INFO L226 Difference]: Without dead ends: 54 [2021-02-23 17:53:46,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:53:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-23 17:53:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-23 17:53:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-23 17:53:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-23 17:53:46,624 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 41 [2021-02-23 17:53:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:46,624 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-23 17:53:46,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 17:53:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-23 17:53:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 17:53:46,631 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:46,631 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, 1, 1] [2021-02-23 17:53:46,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:53:46,632 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash -245289899, now seen corresponding path program 1 times [2021-02-23 17:53:46,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:46,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261041333] [2021-02-23 17:53:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:46,642 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:46,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:46,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:46,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:46,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:46,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:46,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:46,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:46,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 17:53:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261041333] [2021-02-23 17:53:46,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:46,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:53:46,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206938354] [2021-02-23 17:53:46,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:53:46,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:46,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:53:46,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:53:46,850 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 9 states. [2021-02-23 17:53:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:47,418 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2021-02-23 17:53:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:53:47,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2021-02-23 17:53:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:47,421 INFO L225 Difference]: With dead ends: 82 [2021-02-23 17:53:47,421 INFO L226 Difference]: Without dead ends: 76 [2021-02-23 17:53:47,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-23 17:53:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-23 17:53:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-02-23 17:53:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-23 17:53:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-02-23 17:53:47,444 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 42 [2021-02-23 17:53:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:47,445 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-02-23 17:53:47,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:53:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-02-23 17:53:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 17:53:47,448 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:47,448 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2021-02-23 17:53:47,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:53:47,448 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:47,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1853062104, now seen corresponding path program 1 times [2021-02-23 17:53:47,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:47,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536190526] [2021-02-23 17:53:47,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:47,452 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:47,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:47,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:47,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:47,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,558 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 17:53:47,559 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 17:53:47,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:53:47,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:47,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:47,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:47,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-23 17:53:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:47,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-23 17:53:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:47,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:47,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-23 17:53:47,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536190526] [2021-02-23 17:53:47,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:47,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 17:53:47,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543564197] [2021-02-23 17:53:47,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 17:53:47,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 17:53:47,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:53:47,634 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 7 states. [2021-02-23 17:53:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:47,986 INFO L93 Difference]: Finished difference Result 138 states and 186 transitions. [2021-02-23 17:53:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:53:47,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2021-02-23 17:53:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:47,989 INFO L225 Difference]: With dead ends: 138 [2021-02-23 17:53:47,989 INFO L226 Difference]: Without dead ends: 78 [2021-02-23 17:53:47,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:53:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-23 17:53:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-23 17:53:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-23 17:53:48,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-02-23 17:53:48,016 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 58 [2021-02-23 17:53:48,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:48,017 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-02-23 17:53:48,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 17:53:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-02-23 17:53:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-23 17:53:48,027 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:48,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:48,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:53:48,028 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:48,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:48,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1662933173, now seen corresponding path program 1 times [2021-02-23 17:53:48,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:48,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830308941] [2021-02-23 17:53:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:48,032 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,234 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:48,235 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:48,247 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:48,248 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:48,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-23 17:53:48,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830308941] [2021-02-23 17:53:48,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:48,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:53:48,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922607623] [2021-02-23 17:53:48,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:53:48,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:48,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:53:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:53:48,322 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 9 states. [2021-02-23 17:53:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:48,734 INFO L93 Difference]: Finished difference Result 150 states and 205 transitions. [2021-02-23 17:53:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:53:48,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2021-02-23 17:53:48,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:48,738 INFO L225 Difference]: With dead ends: 150 [2021-02-23 17:53:48,738 INFO L226 Difference]: Without dead ends: 86 [2021-02-23 17:53:48,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:53:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-23 17:53:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-02-23 17:53:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-02-23 17:53:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-02-23 17:53:48,770 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 59 [2021-02-23 17:53:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:48,770 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-02-23 17:53:48,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:53:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-02-23 17:53:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-23 17:53:48,773 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:48,773 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:48,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:53:48,773 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -702082707, now seen corresponding path program 1 times [2021-02-23 17:53:48,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:48,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212306500] [2021-02-23 17:53:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:48,777 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:48,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:48,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:48,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:48,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:48,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-23 17:53:48,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212306500] [2021-02-23 17:53:48,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:48,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 17:53:48,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647770896] [2021-02-23 17:53:48,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 17:53:48,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:48,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 17:53:48,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:53:48,982 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 11 states. [2021-02-23 17:53:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:49,648 INFO L93 Difference]: Finished difference Result 126 states and 166 transitions. [2021-02-23 17:53:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:53:49,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2021-02-23 17:53:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:49,652 INFO L225 Difference]: With dead ends: 126 [2021-02-23 17:53:49,652 INFO L226 Difference]: Without dead ends: 120 [2021-02-23 17:53:49,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-23 17:53:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-23 17:53:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2021-02-23 17:53:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-02-23 17:53:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2021-02-23 17:53:49,688 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 60 [2021-02-23 17:53:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:49,689 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2021-02-23 17:53:49,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 17:53:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2021-02-23 17:53:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-23 17:53:49,691 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:49,691 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2021-02-23 17:53:49,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 17:53:49,692 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1046643654, now seen corresponding path program 1 times [2021-02-23 17:53:49,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:49,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389265277] [2021-02-23 17:53:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:49,695 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:49,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:49,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:49,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:49,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:49,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:49,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:49,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:49,811 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:49,812 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:49,823 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:49,824 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:49,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:49,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:49,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:49,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:49,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:49,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:49,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-23 17:53:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:49,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:49,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-23 17:53:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389265277] [2021-02-23 17:53:49,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:49,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 17:53:49,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623012775] [2021-02-23 17:53:49,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 17:53:49,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:49,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 17:53:49,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:53:49,895 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand 10 states. [2021-02-23 17:53:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:50,436 INFO L93 Difference]: Finished difference Result 235 states and 356 transitions. [2021-02-23 17:53:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:53:50,437 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2021-02-23 17:53:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:50,440 INFO L225 Difference]: With dead ends: 235 [2021-02-23 17:53:50,440 INFO L226 Difference]: Without dead ends: 135 [2021-02-23 17:53:50,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:53:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-23 17:53:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2021-02-23 17:53:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-23 17:53:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2021-02-23 17:53:50,478 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 77 [2021-02-23 17:53:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:50,479 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2021-02-23 17:53:50,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 17:53:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2021-02-23 17:53:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-02-23 17:53:50,483 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:50,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1] [2021-02-23 17:53:50,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 17:53:50,483 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash 549553181, now seen corresponding path program 1 times [2021-02-23 17:53:50,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:50,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671803777] [2021-02-23 17:53:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:50,487 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:50,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:50,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:50,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:50,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:50,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:50,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:50,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:50,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:50,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:50,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:50,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:50,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:50,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:50,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:50,638 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:50,639 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:50,650 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:50,651 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:50,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:50,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:50,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:50,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:50,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:50,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:50,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:50,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:53:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:50,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:50,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:50,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-23 17:53:50,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671803777] [2021-02-23 17:53:50,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:50,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 17:53:50,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283575338] [2021-02-23 17:53:50,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 17:53:50,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 17:53:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:53:50,730 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand 12 states. [2021-02-23 17:53:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:51,355 INFO L93 Difference]: Finished difference Result 265 states and 408 transitions. [2021-02-23 17:53:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:53:51,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2021-02-23 17:53:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:51,360 INFO L225 Difference]: With dead ends: 265 [2021-02-23 17:53:51,360 INFO L226 Difference]: Without dead ends: 159 [2021-02-23 17:53:51,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-02-23 17:53:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-23 17:53:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2021-02-23 17:53:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-02-23 17:53:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 199 transitions. [2021-02-23 17:53:51,425 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 199 transitions. Word has length 78 [2021-02-23 17:53:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:51,426 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 199 transitions. [2021-02-23 17:53:51,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 17:53:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 199 transitions. [2021-02-23 17:53:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-23 17:53:51,429 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:51,429 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-02-23 17:53:51,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 17:53:51,430 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:51,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1536611686, now seen corresponding path program 2 times [2021-02-23 17:53:51,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:51,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233502747] [2021-02-23 17:53:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:51,438 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:51,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:51,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:51,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:51,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:51,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:51,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:51,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:51,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:51,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:51,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:51,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:51,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:51,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:51,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:51,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:51,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:51,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:53:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:51,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:51,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:51,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:51,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-02-23 17:53:51,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233502747] [2021-02-23 17:53:51,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:51,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 17:53:51,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770385000] [2021-02-23 17:53:51,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 17:53:51,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 17:53:51,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:53:51,759 INFO L87 Difference]: Start difference. First operand 141 states and 199 transitions. Second operand 13 states. [2021-02-23 17:53:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:52,512 INFO L93 Difference]: Finished difference Result 221 states and 323 transitions. [2021-02-23 17:53:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 17:53:52,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2021-02-23 17:53:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:52,517 INFO L225 Difference]: With dead ends: 221 [2021-02-23 17:53:52,517 INFO L226 Difference]: Without dead ends: 215 [2021-02-23 17:53:52,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-02-23 17:53:52,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-23 17:53:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 209. [2021-02-23 17:53:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-02-23 17:53:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 310 transitions. [2021-02-23 17:53:52,564 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 310 transitions. Word has length 96 [2021-02-23 17:53:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:52,564 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 310 transitions. [2021-02-23 17:53:52,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 17:53:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 310 transitions. [2021-02-23 17:53:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-02-23 17:53:52,568 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:52,568 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:52,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 17:53:52,569 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1860651107, now seen corresponding path program 2 times [2021-02-23 17:53:52,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:52,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806452491] [2021-02-23 17:53:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:52,572 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:52,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:52,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:52,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:52,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:52,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:52,742 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:52,742 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:52,754 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:52,755 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:52,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:52,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:53:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:52,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:52,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-02-23 17:53:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:53:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:52,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:52,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-02-23 17:53:52,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806452491] [2021-02-23 17:53:52,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:52,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 17:53:52,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676351017] [2021-02-23 17:53:52,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 17:53:52,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:52,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 17:53:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:53:52,923 INFO L87 Difference]: Start difference. First operand 209 states and 310 transitions. Second operand 13 states. [2021-02-23 17:53:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:53,694 INFO L93 Difference]: Finished difference Result 457 states and 782 transitions. [2021-02-23 17:53:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 17:53:53,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 149 [2021-02-23 17:53:53,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:53,700 INFO L225 Difference]: With dead ends: 457 [2021-02-23 17:53:53,700 INFO L226 Difference]: Without dead ends: 265 [2021-02-23 17:53:53,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-02-23 17:53:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-02-23 17:53:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 235. [2021-02-23 17:53:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2021-02-23 17:53:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 363 transitions. [2021-02-23 17:53:53,771 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 363 transitions. Word has length 149 [2021-02-23 17:53:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:53,772 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 363 transitions. [2021-02-23 17:53:53,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 17:53:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 363 transitions. [2021-02-23 17:53:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-02-23 17:53:53,777 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:53,777 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:53,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 17:53:53,778 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash 623971222, now seen corresponding path program 3 times [2021-02-23 17:53:53,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:53,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923697814] [2021-02-23 17:53:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:53,781 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:53,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:53,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:53,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:53,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:53,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:53,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:53,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:53,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:53,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:53,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:53,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:53,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:53,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:53,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:53,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:53,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:53,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:53,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:54,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:53:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-02-23 17:53:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:54,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 17:53:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,227 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:54,228 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:54,246 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:54,247 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:54,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:54,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:54,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:54,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 31 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-02-23 17:53:54,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923697814] [2021-02-23 17:53:54,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:54,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-02-23 17:53:54,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646135292] [2021-02-23 17:53:54,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-23 17:53:54,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-23 17:53:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-23 17:53:54,415 INFO L87 Difference]: Start difference. First operand 235 states and 363 transitions. Second operand 21 states. [2021-02-23 17:53:56,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:56,270 INFO L93 Difference]: Finished difference Result 429 states and 722 transitions. [2021-02-23 17:53:56,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-23 17:53:56,271 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 186 [2021-02-23 17:53:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:56,275 INFO L225 Difference]: With dead ends: 429 [2021-02-23 17:53:56,275 INFO L226 Difference]: Without dead ends: 204 [2021-02-23 17:53:56,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2021-02-23 17:53:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-02-23 17:53:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 179. [2021-02-23 17:53:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-02-23 17:53:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 234 transitions. [2021-02-23 17:53:56,315 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 234 transitions. Word has length 186 [2021-02-23 17:53:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:56,315 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 234 transitions. [2021-02-23 17:53:56,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-23 17:53:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 234 transitions. [2021-02-23 17:53:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-02-23 17:53:56,333 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:56,333 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:53:56,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 17:53:56,333 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:56,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:56,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1315805160, now seen corresponding path program 4 times [2021-02-23 17:53:56,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:56,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551923243] [2021-02-23 17:53:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:56,341 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:53:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,567 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:53:56,567 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:53:56,582 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:53:56,584 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:53:56,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-02-23 17:53:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:56,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:56,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:56,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:56,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-02-23 17:53:56,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551923243] [2021-02-23 17:53:56,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:56,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 17:53:56,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272043597] [2021-02-23 17:53:56,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 17:53:56,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:56,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 17:53:56,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:53:56,712 INFO L87 Difference]: Start difference. First operand 179 states and 234 transitions. Second operand 14 states. [2021-02-23 17:53:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:57,618 INFO L93 Difference]: Finished difference Result 348 states and 474 transitions. [2021-02-23 17:53:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 17:53:57,619 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2021-02-23 17:53:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:57,622 INFO L225 Difference]: With dead ends: 348 [2021-02-23 17:53:57,622 INFO L226 Difference]: Without dead ends: 190 [2021-02-23 17:53:57,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-02-23 17:53:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-02-23 17:53:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-02-23 17:53:57,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-02-23 17:53:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 249 transitions. [2021-02-23 17:53:57,661 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 249 transitions. Word has length 131 [2021-02-23 17:53:57,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:57,661 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 249 transitions. [2021-02-23 17:53:57,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 17:53:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 249 transitions. [2021-02-23 17:53:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-02-23 17:53:57,664 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:57,665 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-02-23 17:53:57,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 17:53:57,665 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1825236008, now seen corresponding path program 1 times [2021-02-23 17:53:57,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:57,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249630920] [2021-02-23 17:53:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:57,668 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:53:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:53:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:57,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:57,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:53:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:53:57,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:53:57,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-02-23 17:53:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:53:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:53:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:57,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:53:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:53:57,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:53:57,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:53:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-02-23 17:53:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249630920] [2021-02-23 17:53:58,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:53:58,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 17:53:58,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519491237] [2021-02-23 17:53:58,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 17:53:58,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:53:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 17:53:58,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-02-23 17:53:58,032 INFO L87 Difference]: Start difference. First operand 190 states and 249 transitions. Second operand 16 states. [2021-02-23 17:53:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:53:59,354 INFO L93 Difference]: Finished difference Result 359 states and 492 transitions. [2021-02-23 17:53:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 17:53:59,355 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 149 [2021-02-23 17:53:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:53:59,358 INFO L225 Difference]: With dead ends: 359 [2021-02-23 17:53:59,358 INFO L226 Difference]: Without dead ends: 190 [2021-02-23 17:53:59,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2021-02-23 17:53:59,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-02-23 17:53:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2021-02-23 17:53:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-02-23 17:53:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 239 transitions. [2021-02-23 17:53:59,397 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 239 transitions. Word has length 149 [2021-02-23 17:53:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:53:59,398 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 239 transitions. [2021-02-23 17:53:59,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 17:53:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 239 transitions. [2021-02-23 17:53:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-02-23 17:53:59,401 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:53:59,401 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-02-23 17:53:59,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 17:53:59,401 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:53:59,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:53:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1835265144, now seen corresponding path program 2 times [2021-02-23 17:53:59,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:53:59,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798521644] [2021-02-23 17:53:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:53:59,405 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:53:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:53:59,422 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:53:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:53:59,439 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:53:59,492 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:53:59,492 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:53:59,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 17:53:59,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:53:59 BoogieIcfgContainer [2021-02-23 17:53:59,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:53:59,519 INFO L168 Benchmark]: Toolchain (without parser) took 16359.60 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 134.0 MB in the beginning and 323.5 MB in the end (delta: -189.5 MB). Peak memory consumption was 36.6 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:59,519 INFO L168 Benchmark]: CDTParser took 1.08 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 124.9 MB in the end (delta: 73.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:53:59,520 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.36 ms. Allocated memory is still 151.0 MB. Free memory was 132.7 MB in the beginning and 122.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:59,520 INFO L168 Benchmark]: Boogie Preprocessor took 36.23 ms. Allocated memory is still 151.0 MB. Free memory was 122.8 MB in the beginning and 121.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:59,520 INFO L168 Benchmark]: RCFGBuilder took 727.94 ms. Allocated memory is still 151.0 MB. Free memory was 121.2 MB in the beginning and 120.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:59,520 INFO L168 Benchmark]: TraceAbstraction took 15329.24 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 119.6 MB in the beginning and 323.5 MB in the end (delta: -203.9 MB). Peak memory consumption was 23.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:53:59,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.08 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 124.9 MB in the end (delta: 73.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.36 ms. Allocated memory is still 151.0 MB. Free memory was 132.7 MB in the beginning and 122.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.23 ms. Allocated memory is still 151.0 MB. Free memory was 122.8 MB in the beginning and 121.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 727.94 ms. Allocated memory is still 151.0 MB. Free memory was 121.2 MB in the beginning and 120.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15329.24 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 119.6 MB in the beginning and 323.5 MB in the end (delta: -203.9 MB). Peak memory consumption was 23.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 5; [L39] CALL, EXPR fibo1(x) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND FALSE !(n == 1) [L25] CALL, EXPR fibo1(n-1) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND FALSE !(n == 1) [L25] CALL, EXPR fibo1(n-1) [L10] COND FALSE !(n < 1) [L12] COND TRUE n == 1 [L13] return 1; [L25] RET, EXPR fibo1(n-1) [L25] CALL, EXPR fibo1(n-2) [L10] COND TRUE n < 1 [L11] return 0; [L25] RET, EXPR fibo1(n-2) [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND FALSE !(n < 1) [L22] COND TRUE n == 1 [L23] return 1; [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) [L25] CALL, EXPR fibo1(n-2) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND TRUE n == 1 [L23] return 1; [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND TRUE n < 1 [L21] return 0; [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND FALSE !(n < 1) [L22] COND FALSE !(n == 1) [L25] CALL, EXPR fibo1(n-1) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND TRUE n == 1 [L23] return 1; [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND TRUE n < 1 [L21] return 0; [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) [L25] CALL, EXPR fibo1(n-2) [L10] COND FALSE !(n < 1) [L12] COND TRUE n == 1 [L13] return 1; [L25] RET, EXPR fibo1(n-2) [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 5 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.2s, OverallIterations: 15, TraceHistogramMax: 10, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 694 SDtfs, 1338 SDslu, 1440 SDs, 0 SdLazy, 4349 SolverSat, 672 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 530 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=235occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 115 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...