/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:26:13,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:26:13,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:26:13,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:26:13,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:26:13,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:26:13,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:26:13,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:26:13,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:26:13,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:26:13,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:26:13,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:26:13,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:26:13,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:26:13,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:26:13,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:26:13,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:26:13,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:26:13,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:26:13,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:26:13,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:26:13,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:26:13,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:26:13,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:26:13,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:26:13,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:26:13,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:26:13,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:26:13,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:26:13,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:26:13,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:26:13,365 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:26:13,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:26:13,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:26:13,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:26:13,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:26:13,368 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:26:13,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:26:13,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:26:13,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:26:13,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:26:13,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:26:13,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:26:13,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:26:13,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:26:13,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:26:13,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:26:13,973 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:26:13,979 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:26:13,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2021-02-21 21:26:14,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0066469d5/cbb7bc7a72504fc994b22dbb807d5965/FLAG52fb4be52 [2021-02-21 21:26:14,992 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:26:14,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2021-02-21 21:26:15,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0066469d5/cbb7bc7a72504fc994b22dbb807d5965/FLAG52fb4be52 [2021-02-21 21:26:15,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0066469d5/cbb7bc7a72504fc994b22dbb807d5965 [2021-02-21 21:26:15,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:26:15,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:26:15,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:26:15,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:26:15,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:26:15,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:26:15" (1/1) ... [2021-02-21 21:26:15,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d89640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15, skipping insertion in model container [2021-02-21 21:26:15,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:26:15" (1/1) ... [2021-02-21 21:26:15,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:26:15,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:26:15,312 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i[895,908] [2021-02-21 21:26:15,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:26:15,346 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:26:15,375 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i[895,908] [2021-02-21 21:26:15,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:26:15,433 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:26:15,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15 WrapperNode [2021-02-21 21:26:15,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:26:15,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:26:15,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:26:15,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:26:15,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15" (1/1) ... [2021-02-21 21:26:15,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15" (1/1) ... [2021-02-21 21:26:15,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15" (1/1) ... [2021-02-21 21:26:15,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15" (1/1) ... [2021-02-21 21:26:15,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15" (1/1) ... [2021-02-21 21:26:15,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15" (1/1) ... [2021-02-21 21:26:15,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15" (1/1) ... [2021-02-21 21:26:15,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:26:15,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:26:15,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:26:15,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:26:15,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15" (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 [2021-02-21 21:26:15,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:26:15,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:26:15,701 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:26:15,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:26:15,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:26:15,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:26:15,702 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:26:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:26:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:26:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:26:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:26:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:26:15,703 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:26:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:26:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:26:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:26:15,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:26:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:26:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:26:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:26:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:26:15,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:26:16,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:26:16,238 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:26:16,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:26:16 BoogieIcfgContainer [2021-02-21 21:26:16,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:26:16,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:26:16,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:26:16,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:26:16,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:26:15" (1/3) ... [2021-02-21 21:26:16,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea5bcad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:26:16, skipping insertion in model container [2021-02-21 21:26:16,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:26:15" (2/3) ... [2021-02-21 21:26:16,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea5bcad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:26:16, skipping insertion in model container [2021-02-21 21:26:16,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:26:16" (3/3) ... [2021-02-21 21:26:16,256 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2021-02-21 21:26:16,266 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:26:16,272 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:26:16,300 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:26:16,339 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:26:16,339 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:26:16,339 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:26:16,340 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:26:16,340 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:26:16,340 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:26:16,340 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:26:16,340 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:26:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-02-21 21:26:16,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 21:26:16,376 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:26:16,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:26:16,378 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:26:16,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:26:16,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1301066525, now seen corresponding path program 1 times [2021-02-21 21:26:16,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:26:16,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245247601] [2021-02-21 21:26:16,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:26:16,526 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:26:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:16,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:16,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:16,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:16,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:26:17,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:17,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:26:17,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:17,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:26:17,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:17,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:26:17,085 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:26:17,088 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:26:17,164 WARN L141 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size [2021-02-21 21:26:17,167 WARN L147 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size 31 [2021-02-21 21:26:17,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:17,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:17,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:17,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:17,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:17,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:17,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:26:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:17,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:17,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:26:17,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245247601] [2021-02-21 21:26:17,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:26:17,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:26:17,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015797946] [2021-02-21 21:26:17,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:26:17,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:26:17,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:26:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:26:17,447 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 10 states. [2021-02-21 21:26:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:26:18,226 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-02-21 21:26:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 21:26:18,228 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-02-21 21:26:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:26:18,240 INFO L225 Difference]: With dead ends: 78 [2021-02-21 21:26:18,240 INFO L226 Difference]: Without dead ends: 47 [2021-02-21 21:26:18,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:26:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-21 21:26:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-02-21 21:26:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-21 21:26:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-21 21:26:18,307 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 27 [2021-02-21 21:26:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:26:18,308 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-21 21:26:18,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:26:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-21 21:26:18,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-21 21:26:18,310 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:26:18,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:26:18,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:26:18,311 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:26:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:26:18,312 INFO L82 PathProgramCache]: Analyzing trace with hash 981129577, now seen corresponding path program 1 times [2021-02-21 21:26:18,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:26:18,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259735142] [2021-02-21 21:26:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:26:20,548 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:26:20,560 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:26:20,600 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:26:20,602 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-21 21:26:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:20,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:20,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:20,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:20,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:26:20,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:20,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:26:20,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:20,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:26:20,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:20,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:26:20,934 WARN L141 QuantifierPusher]: treesize reduction 61, result has 29.1 percent of original size [2021-02-21 21:26:20,936 WARN L147 QuantifierPusher]: treesize reduction 61, result has 29.1 percent of original size 25 [2021-02-21 21:26:20,964 WARN L141 QuantifierPusher]: treesize reduction 54, result has 23.9 percent of original size [2021-02-21 21:26:20,965 WARN L147 QuantifierPusher]: treesize reduction 54, result has 23.9 percent of original size 17 [2021-02-21 21:26:20,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:20,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:20,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:20,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:21,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:21,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:26:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:21,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:26:21,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:21,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:21,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:26:21,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:21,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:21,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-21 21:26:21,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:21,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:21,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-21 21:26:21,501 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size [2021-02-21 21:26:21,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:21,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:21,513 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size 176 [2021-02-21 21:26:21,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:21,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:21,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-21 21:26:21,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:21,721 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-21 21:26:21,727 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-21 21:26:21,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:26:21,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:21,838 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:21,842 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-21 21:26:21,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:26:21,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:21,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:21,964 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:21,968 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-21 21:26:21,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:26:22,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:22,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:22,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259735142] [2021-02-21 21:26:22,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:26:22,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 21:26:22,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866863417] [2021-02-21 21:26:22,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 21:26:22,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:26:22,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 21:26:22,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:26:22,126 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2021-02-21 21:26:23,563 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2021-02-21 21:26:23,772 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 89 [2021-02-21 21:26:24,054 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 94 [2021-02-21 21:26:24,340 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2021-02-21 21:26:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:26:24,761 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-02-21 21:26:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-21 21:26:24,763 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2021-02-21 21:26:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:26:24,765 INFO L225 Difference]: With dead ends: 62 [2021-02-21 21:26:24,765 INFO L226 Difference]: Without dead ends: 57 [2021-02-21 21:26:24,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-02-21 21:26:24,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-21 21:26:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-02-21 21:26:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-21 21:26:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-02-21 21:26:24,810 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 34 [2021-02-21 21:26:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:26:24,811 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-02-21 21:26:24,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 21:26:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-02-21 21:26:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-21 21:26:24,812 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:26:24,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:26:24,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:26:24,813 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:26:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:26:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2144366633, now seen corresponding path program 1 times [2021-02-21 21:26:24,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:26:24,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662487205] [2021-02-21 21:26:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:26:27,060 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:26:27,068 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:26:27,082 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:26:29,263 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:26:29,274 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-21 21:26:29,302 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-21 21:26:29,307 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:26:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:29,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:29,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:29,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:29,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:26:29,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:29,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:26:29,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:29,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:26:29,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:29,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:26:29,760 WARN L141 QuantifierPusher]: treesize reduction 16, result has 89.6 percent of original size [2021-02-21 21:26:29,765 WARN L147 QuantifierPusher]: treesize reduction 16, result has 89.6 percent of original size 138 [2021-02-21 21:26:29,853 WARN L141 QuantifierPusher]: treesize reduction 77, result has 38.4 percent of original size [2021-02-21 21:26:29,856 WARN L147 QuantifierPusher]: treesize reduction 77, result has 38.4 percent of original size 48 [2021-02-21 21:26:29,899 WARN L141 QuantifierPusher]: treesize reduction 54, result has 23.9 percent of original size [2021-02-21 21:26:29,903 WARN L147 QuantifierPusher]: treesize reduction 54, result has 23.9 percent of original size 17 [2021-02-21 21:26:29,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:29,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:29,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:29,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:29,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:29,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:29,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:26:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:29,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:29,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:26:30,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:30,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:30,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:26:30,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:30,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 249 [2021-02-21 21:26:30,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-02-21 21:26:30,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:30,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:30,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-21 21:26:30,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:30,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:30,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-21 21:26:30,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:30,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:30,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:26:30,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:30,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 180 [2021-02-21 21:26:30,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-02-21 21:26:30,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:30,574 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:30,578 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-21 21:26:30,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:26:30,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:30,677 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:30,680 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-21 21:26:30,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:26:30,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:30,799 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:30,802 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-21 21:26:30,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:26:30,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:30,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:30,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662487205] [2021-02-21 21:26:30,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:26:30,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 21:26:30,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517340491] [2021-02-21 21:26:30,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 21:26:30,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:26:30,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 21:26:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-21 21:26:30,962 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 16 states. [2021-02-21 21:26:31,529 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-02-21 21:26:31,689 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2021-02-21 21:26:31,906 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-02-21 21:26:32,508 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-02-21 21:26:32,724 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2021-02-21 21:26:32,977 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 95 [2021-02-21 21:26:33,304 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 97 [2021-02-21 21:26:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:26:33,657 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-02-21 21:26:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-21 21:26:33,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2021-02-21 21:26:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:26:33,659 INFO L225 Difference]: With dead ends: 69 [2021-02-21 21:26:33,660 INFO L226 Difference]: Without dead ends: 64 [2021-02-21 21:26:33,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-02-21 21:26:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-21 21:26:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-02-21 21:26:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-21 21:26:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-02-21 21:26:33,694 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 34 [2021-02-21 21:26:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:26:33,694 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-02-21 21:26:33,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 21:26:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-02-21 21:26:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-21 21:26:33,696 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:26:33,696 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 21:26:33,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:26:33,697 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:26:33,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:26:33,698 INFO L82 PathProgramCache]: Analyzing trace with hash 245685341, now seen corresponding path program 1 times [2021-02-21 21:26:33,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:26:33,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37480845] [2021-02-21 21:26:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:26:35,865 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:26:35,883 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-21 21:26:35,891 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-21 21:26:35,892 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-21 21:26:38,074 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:26:38,079 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:26:38,085 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:26:40,235 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:26:40,240 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:26:40,246 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:26:42,404 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:26:42,409 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-21 21:26:42,416 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-21 21:26:42,417 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:26:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:42,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:42,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:26:42,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:26:42,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:26:42,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:26:42,766 WARN L141 QuantifierPusher]: treesize reduction 549, result has 3.9 percent of original size [2021-02-21 21:26:42,767 WARN L147 QuantifierPusher]: treesize reduction 549, result has 3.9 percent of original size 22 [2021-02-21 21:26:42,791 WARN L141 QuantifierPusher]: treesize reduction 837, result has 18.5 percent of original size [2021-02-21 21:26:42,794 WARN L147 QuantifierPusher]: treesize reduction 837, result has 18.5 percent of original size 190 [2021-02-21 21:26:42,815 WARN L141 QuantifierPusher]: treesize reduction 491, result has 9.9 percent of original size [2021-02-21 21:26:42,817 WARN L147 QuantifierPusher]: treesize reduction 491, result has 9.9 percent of original size 54 [2021-02-21 21:26:42,868 WARN L141 QuantifierPusher]: treesize reduction 348, result has 4.4 percent of original size [2021-02-21 21:26:42,869 WARN L147 QuantifierPusher]: treesize reduction 348, result has 4.4 percent of original size 16 [2021-02-21 21:26:42,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:42,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:42,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:42,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:26:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:42,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:26:42,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:42,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:42,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:43,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:26:43,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:43,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-02-21 21:26:43,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 240 [2021-02-21 21:26:43,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:43,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:43,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-21 21:26:43,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:43,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:43,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-21 21:26:43,320 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size [2021-02-21 21:26:43,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:43,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:43,334 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size 176 [2021-02-21 21:26:43,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:43,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:43,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-21 21:26:43,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:43,545 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-21 21:26:43,548 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-21 21:26:43,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:26:43,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:43,636 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:43,639 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-21 21:26:43,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:26:43,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:43,736 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:43,738 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-21 21:26:43,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:26:43,880 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:26:43,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:43,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:43,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-21 21:26:43,889 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 177 [2021-02-21 21:26:44,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:44,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-21 21:26:44,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:26:44,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:44,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-21 21:26:44,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:26:44,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:44,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 184 [2021-02-21 21:26:44,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-02-21 21:26:44,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:44,597 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:44,599 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-21 21:26:44,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-21 21:26:44,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:44,713 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:44,715 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:26:44,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-21 21:26:44,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:44,842 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:26:44,845 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:26:44,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:26:44,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:44,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:44,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37480845] [2021-02-21 21:26:44,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:26:44,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-21 21:26:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792724269] [2021-02-21 21:26:44,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-21 21:26:44,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:26:44,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-21 21:26:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-02-21 21:26:44,981 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 22 states. [2021-02-21 21:26:45,791 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-02-21 21:26:46,927 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 90 [2021-02-21 21:26:48,026 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-02-21 21:26:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:26:48,465 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2021-02-21 21:26:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-21 21:26:48,466 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2021-02-21 21:26:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:26:48,467 INFO L225 Difference]: With dead ends: 78 [2021-02-21 21:26:48,468 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 21:26:48,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=303, Invalid=1859, Unknown=0, NotChecked=0, Total=2162 [2021-02-21 21:26:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 21:26:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2021-02-21 21:26:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-21 21:26:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-02-21 21:26:48,511 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 41 [2021-02-21 21:26:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:26:48,512 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-02-21 21:26:48,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-21 21:26:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-02-21 21:26:48,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-21 21:26:48,513 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:26:48,514 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 21:26:48,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:26:48,515 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:26:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:26:48,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1551460643, now seen corresponding path program 2 times [2021-02-21 21:26:48,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:26:48,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844430203] [2021-02-21 21:26:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:26:50,679 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:26:50,683 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-21 21:26:50,690 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-21 21:26:52,836 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:26:52,840 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-21 21:26:52,848 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-21 21:26:52,849 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:26:55,036 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:26:55,040 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:26:55,045 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:26:57,200 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:26:57,205 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-21 21:26:57,211 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-21 21:26:59,373 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:26:59,382 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:26:59,401 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:26:59,403 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:26:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:59,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:59,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:26:59,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:26:59,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:26:59,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:26:59,716 WARN L141 QuantifierPusher]: treesize reduction 16, result has 88.1 percent of original size [2021-02-21 21:26:59,718 WARN L147 QuantifierPusher]: treesize reduction 16, result has 88.1 percent of original size 119 [2021-02-21 21:26:59,792 WARN L141 QuantifierPusher]: treesize reduction 118, result has 15.7 percent of original size [2021-02-21 21:26:59,793 WARN L147 QuantifierPusher]: treesize reduction 118, result has 15.7 percent of original size 22 [2021-02-21 21:26:59,808 WARN L141 QuantifierPusher]: treesize reduction 44, result has 35.3 percent of original size [2021-02-21 21:26:59,809 WARN L147 QuantifierPusher]: treesize reduction 44, result has 35.3 percent of original size 24 [2021-02-21 21:26:59,836 WARN L141 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size [2021-02-21 21:26:59,837 WARN L147 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size 16 [2021-02-21 21:26:59,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:59,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:26:59,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:59,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:26:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:26:59,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:26:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:26:59,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:59,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:26:59,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:26:59,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:26:59,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:26:59,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-02-21 21:27:00,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 244 [2021-02-21 21:27:00,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:00,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:00,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-21 21:27:00,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:00,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:00,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-21 21:27:00,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:00,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:00,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:27:00,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:00,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 180 [2021-02-21 21:27:00,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-02-21 21:27:00,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:00,494 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-21 21:27:00,497 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-21 21:27:00,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:27:00,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:00,575 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:00,581 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-21 21:27:00,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:27:00,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:00,676 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:00,678 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:00,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:27:00,781 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:27:00,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:00,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:00,790 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-21 21:27:00,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:00,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:00,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:00,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:27:01,030 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size [2021-02-21 21:27:01,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:01,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:01,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:01,040 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size 184 [2021-02-21 21:27:01,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:01,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:01,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:01,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:01,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:27:01,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:01,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:01,293 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:01,294 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:01,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:01,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:01,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:01,421 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:01,422 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:01,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:01,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:01,574 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:01,577 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:01,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:01,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:01,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:01,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844430203] [2021-02-21 21:27:01,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:01,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-21 21:27:01,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260013309] [2021-02-21 21:27:01,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-21 21:27:01,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:01,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-21 21:27:01,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-02-21 21:27:01,784 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 22 states. [2021-02-21 21:27:02,444 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-02-21 21:27:02,630 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-02-21 21:27:02,834 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2021-02-21 21:27:04,760 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-02-21 21:27:05,001 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 94 [2021-02-21 21:27:05,365 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 99 [2021-02-21 21:27:05,683 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 95 [2021-02-21 21:27:05,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:05,921 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-02-21 21:27:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-21 21:27:05,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2021-02-21 21:27:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:05,925 INFO L225 Difference]: With dead ends: 88 [2021-02-21 21:27:05,926 INFO L226 Difference]: Without dead ends: 83 [2021-02-21 21:27:05,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2021-02-21 21:27:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-21 21:27:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-02-21 21:27:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-21 21:27:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-02-21 21:27:05,975 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 41 [2021-02-21 21:27:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:05,975 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-02-21 21:27:05,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-21 21:27:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-02-21 21:27:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:27:05,977 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:05,978 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:27:05,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:27:05,978 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1763850199, now seen corresponding path program 3 times [2021-02-21 21:27:05,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:05,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181185524] [2021-02-21 21:27:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:08,151 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:08,156 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-21 21:27:08,161 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-21 21:27:10,315 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:10,321 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-21 21:27:10,327 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-21 21:27:12,492 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:27:12,495 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-21 21:27:12,502 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-21 21:27:12,503 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:27:14,662 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:27:14,666 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:27:14,675 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:27:16,839 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:16,843 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-21 21:27:16,851 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-21 21:27:19,032 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:19,037 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:27:19,043 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:27:19,044 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:27:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:19,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:19,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:27:19,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:27:19,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:27:19,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:27:19,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-21 21:27:19,380 WARN L141 QuantifierPusher]: treesize reduction 325, result has 11.2 percent of original size [2021-02-21 21:27:19,381 WARN L147 QuantifierPusher]: treesize reduction 325, result has 11.2 percent of original size 41 [2021-02-21 21:27:19,384 WARN L141 QuantifierPusher]: treesize reduction 145, result has 14.2 percent of original size [2021-02-21 21:27:19,385 WARN L147 QuantifierPusher]: treesize reduction 145, result has 14.2 percent of original size 24 [2021-02-21 21:27:19,412 WARN L141 QuantifierPusher]: treesize reduction 153, result has 9.5 percent of original size [2021-02-21 21:27:19,413 WARN L147 QuantifierPusher]: treesize reduction 153, result has 9.5 percent of original size 16 [2021-02-21 21:27:19,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:19,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:19,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:19,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:19,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:19,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:19,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:19,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:27:19,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:19,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-02-21 21:27:19,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 248 [2021-02-21 21:27:19,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:19,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:19,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-21 21:27:19,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:19,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:19,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-21 21:27:19,870 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size [2021-02-21 21:27:19,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:19,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:19,878 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size 176 [2021-02-21 21:27:19,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:19,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:19,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:19,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-21 21:27:20,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:20,059 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-21 21:27:20,061 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-21 21:27:20,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:27:20,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:20,155 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:20,157 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-21 21:27:20,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:27:20,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:20,254 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:20,256 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-21 21:27:20,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:27:20,375 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:27:20,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:20,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-21 21:27:20,383 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 177 [2021-02-21 21:27:20,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:20,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-21 21:27:20,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:27:20,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:20,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-21 21:27:20,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:27:20,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:20,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:20,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 184 [2021-02-21 21:27:20,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-02-21 21:27:21,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:21,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:21,028 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:21,030 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-21 21:27:21,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-21 21:27:21,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:21,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:21,156 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:21,158 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:21,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-21 21:27:21,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:21,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:21,290 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:21,291 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:21,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:21,429 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:27:21,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:21,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:21,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:21,435 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-21 21:27:21,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:21,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:21,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:21,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:21,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:27:21,749 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size [2021-02-21 21:27:21,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:21,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:21,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:21,759 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size 184 [2021-02-21 21:27:21,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:21,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:21,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:21,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:21,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:27:22,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:22,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:22,078 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:22,080 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:22,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:22,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:22,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:22,257 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:22,261 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:22,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:22,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:22,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:22,435 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:22,437 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:22,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:22,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:22,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:22,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181185524] [2021-02-21 21:27:22,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:22,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-02-21 21:27:22,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228835005] [2021-02-21 21:27:22,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-21 21:27:22,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:22,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-21 21:27:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-02-21 21:27:22,638 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 28 states. [2021-02-21 21:27:23,522 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-02-21 21:27:23,696 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-02-21 21:27:24,795 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 90 [2021-02-21 21:27:27,131 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-02-21 21:27:27,404 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 96 [2021-02-21 21:27:27,723 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 101 [2021-02-21 21:27:28,073 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 97 [2021-02-21 21:27:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:28,343 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-02-21 21:27:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-21 21:27:28,344 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-02-21 21:27:28,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:28,346 INFO L225 Difference]: With dead ends: 97 [2021-02-21 21:27:28,347 INFO L226 Difference]: Without dead ends: 92 [2021-02-21 21:27:28,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=427, Invalid=3355, Unknown=0, NotChecked=0, Total=3782 [2021-02-21 21:27:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-21 21:27:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-02-21 21:27:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-21 21:27:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-02-21 21:27:28,400 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 48 [2021-02-21 21:27:28,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:28,400 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-02-21 21:27:28,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-21 21:27:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-02-21 21:27:28,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:27:28,402 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:28,402 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:27:28,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:27:28,403 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:28,404 INFO L82 PathProgramCache]: Analyzing trace with hash -600613143, now seen corresponding path program 4 times [2021-02-21 21:27:28,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:28,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237053770] [2021-02-21 21:27:28,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:30,589 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:30,593 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-21 21:27:30,600 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-21 21:27:32,773 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:32,777 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-21 21:27:32,789 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-21 21:27:34,961 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:27:34,965 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-21 21:27:34,970 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-21 21:27:34,971 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:27:37,141 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:27:37,145 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:27:37,150 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:27:39,352 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:39,356 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:27:39,362 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:27:41,555 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:41,558 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-21 21:27:41,563 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-21 21:27:41,564 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:27:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:41,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:41,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:27:41,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:27:41,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:27:41,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:27:41,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 21:27:41,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-21 21:27:41,748 WARN L141 QuantifierPusher]: treesize reduction 43, result has 41.1 percent of original size [2021-02-21 21:27:41,750 WARN L147 QuantifierPusher]: treesize reduction 43, result has 41.1 percent of original size 30 [2021-02-21 21:27:41,803 WARN L141 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size [2021-02-21 21:27:41,804 WARN L147 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size 16 [2021-02-21 21:27:41,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:41,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:41,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:41,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:41,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:41,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:41,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:41,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:27:41,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:41,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-02-21 21:27:41,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 236 [2021-02-21 21:27:42,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:42,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:42,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-21 21:27:42,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:42,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:42,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-21 21:27:42,227 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size [2021-02-21 21:27:42,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:42,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:42,235 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size 176 [2021-02-21 21:27:42,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:42,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:27:42,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-21 21:27:42,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:42,412 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-21 21:27:42,415 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-21 21:27:42,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:27:42,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:42,507 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:42,509 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-21 21:27:42,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:27:42,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:42,607 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:42,610 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-21 21:27:42,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:27:42,745 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:27:42,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:42,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-21 21:27:42,753 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 177 [2021-02-21 21:27:42,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:42,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:42,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-21 21:27:42,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:27:43,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:43,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:43,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:43,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-21 21:27:43,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:27:43,259 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:43,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:43,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:43,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 184 [2021-02-21 21:27:43,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-02-21 21:27:43,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:43,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:43,425 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:43,427 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-21 21:27:43,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-21 21:27:43,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:43,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:43,562 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:43,564 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:43,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-21 21:27:43,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:43,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:43,707 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:43,708 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:43,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:43,853 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:27:43,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:43,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:43,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:43,860 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-21 21:27:44,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:44,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:44,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:27:44,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:44,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:27:44,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-02-21 21:27:44,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:44,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-02-21 21:27:44,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-02-21 21:27:44,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:44,588 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:44,591 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:44,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:44,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:44,786 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:44,788 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:44,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:44,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:27:44,973 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:27:44,976 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:27:44,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:27:45,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:45,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:45,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237053770] [2021-02-21 21:27:45,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:45,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-02-21 21:27:45,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741619701] [2021-02-21 21:27:45,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-21 21:27:45,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:45,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-21 21:27:45,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-02-21 21:27:45,175 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 28 states. [2021-02-21 21:27:46,111 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-02-21 21:27:46,361 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-02-21 21:27:46,590 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-02-21 21:27:47,901 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 90 [2021-02-21 21:27:50,623 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-02-21 21:27:51,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:51,212 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-02-21 21:27:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-21 21:27:51,214 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-02-21 21:27:51,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:51,215 INFO L225 Difference]: With dead ends: 97 [2021-02-21 21:27:51,215 INFO L226 Difference]: Without dead ends: 92 [2021-02-21 21:27:51,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=377, Invalid=3045, Unknown=0, NotChecked=0, Total=3422 [2021-02-21 21:27:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-21 21:27:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-02-21 21:27:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-02-21 21:27:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-02-21 21:27:51,310 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 48 [2021-02-21 21:27:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:51,310 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-02-21 21:27:51,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-21 21:27:51,311 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-02-21 21:27:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:27:51,312 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:51,312 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:27:51,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:27:51,313 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1016933271, now seen corresponding path program 5 times [2021-02-21 21:27:51,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:51,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573304801] [2021-02-21 21:27:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:53,517 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:53,527 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-21 21:27:53,531 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-21 21:27:55,728 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:27:55,732 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-21 21:27:55,738 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-21 21:27:57,960 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:27:57,964 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-21 21:27:57,969 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-21 21:27:57,970 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:28:00,165 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:28:00,169 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:28:00,178 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:28:02,383 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:28:02,387 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-21 21:28:02,393 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-21 21:28:04,587 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:28:04,592 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:28:04,596 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:28:04,597 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:28:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:04,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:04,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:04,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:04,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:28:04,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:04,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:28:04,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:04,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:28:04,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:04,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:28:04,816 WARN L141 QuantifierPusher]: treesize reduction 140, result has 13.6 percent of original size [2021-02-21 21:28:04,819 WARN L147 QuantifierPusher]: treesize reduction 140, result has 13.6 percent of original size 22 [2021-02-21 21:28:04,849 WARN L141 QuantifierPusher]: treesize reduction 155, result has 12.4 percent of original size [2021-02-21 21:28:04,850 WARN L147 QuantifierPusher]: treesize reduction 155, result has 12.4 percent of original size 22 [2021-02-21 21:28:04,853 WARN L141 QuantifierPusher]: treesize reduction 44, result has 35.3 percent of original size [2021-02-21 21:28:04,854 WARN L147 QuantifierPusher]: treesize reduction 44, result has 35.3 percent of original size 24 [2021-02-21 21:28:04,886 WARN L141 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size [2021-02-21 21:28:04,887 WARN L147 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size 16 [2021-02-21 21:28:04,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:04,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:04,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:04,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:04,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:04,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:04,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:28:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:04,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:04,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:28:05,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:28:05,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:28:05,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-02-21 21:28:05,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 248 [2021-02-21 21:28:05,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:28:05,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-21 21:28:05,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:28:05,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-21 21:28:05,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:28:05,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:28:05,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 180 [2021-02-21 21:28:05,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-02-21 21:28:05,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,543 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-21 21:28:05,545 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-21 21:28:05,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:28:05,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,642 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:05,648 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-21 21:28:05,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:28:05,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,760 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:05,762 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:05,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:28:05,879 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:28:05,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:05,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:05,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:05,887 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-21 21:28:06,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:06,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:06,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:06,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:06,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:28:06,218 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size [2021-02-21 21:28:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:06,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:06,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:06,226 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size 184 [2021-02-21 21:28:06,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:06,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:06,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:06,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:06,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:28:06,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:06,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:06,524 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:06,525 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:06,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:06,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:06,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:06,666 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:06,669 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:06,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:06,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:06,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:06,830 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:06,832 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:06,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:07,018 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:28:07,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:07,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:07,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:07,027 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-21 21:28:07,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:07,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:07,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:07,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:07,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:28:07,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:07,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:07,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:07,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:07,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-02-21 21:28:07,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:07,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:07,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:07,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-02-21 21:28:07,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-02-21 21:28:07,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:07,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:07,902 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:07,904 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:07,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:08,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:08,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:08,086 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:08,089 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:08,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:08,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:08,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:08,300 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:08,302 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:08,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:08,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:08,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:08,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573304801] [2021-02-21 21:28:08,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:28:08,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-02-21 21:28:08,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560150346] [2021-02-21 21:28:08,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-21 21:28:08,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:28:08,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-21 21:28:08,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-02-21 21:28:08,509 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 28 states. [2021-02-21 21:28:09,144 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-02-21 21:28:09,509 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 40 [2021-02-21 21:28:09,733 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 42 [2021-02-21 21:28:12,535 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 95 [2021-02-21 21:28:13,699 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-02-21 21:28:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:28:14,290 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-02-21 21:28:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-21 21:28:14,292 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-02-21 21:28:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:28:14,293 INFO L225 Difference]: With dead ends: 111 [2021-02-21 21:28:14,293 INFO L226 Difference]: Without dead ends: 106 [2021-02-21 21:28:14,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=380, Invalid=2812, Unknown=0, NotChecked=0, Total=3192 [2021-02-21 21:28:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-21 21:28:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2021-02-21 21:28:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-21 21:28:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-02-21 21:28:14,372 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 48 [2021-02-21 21:28:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:28:14,373 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-02-21 21:28:14,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-21 21:28:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-02-21 21:28:14,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:28:14,375 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:28:14,375 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:28:14,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:28:14,375 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:28:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:28:14,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1480888041, now seen corresponding path program 6 times [2021-02-21 21:28:14,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:28:14,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363924927] [2021-02-21 21:28:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:28:16,595 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-02-21 21:28:16,601 WARN L141 QuantifierPusher]: treesize reduction 10, result has 93.0 percent of original size [2021-02-21 21:28:16,606 WARN L147 QuantifierPusher]: treesize reduction 10, result has 93.0 percent of original size 132 [2021-02-21 21:28:18,825 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-02-21 21:28:18,830 WARN L141 QuantifierPusher]: treesize reduction 8, result has 94.6 percent of original size [2021-02-21 21:28:18,834 WARN L147 QuantifierPusher]: treesize reduction 8, result has 94.6 percent of original size 140 [2021-02-21 21:28:18,836 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:28:21,042 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:28:21,046 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-21 21:28:21,050 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-21 21:28:23,232 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:28:23,235 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-21 21:28:23,239 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-21 21:28:23,240 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:28:25,447 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-21 21:28:25,451 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:28:25,456 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:28:27,663 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:28:27,668 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-21 21:28:27,672 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-21 21:28:29,889 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-21 21:28:29,893 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-21 21:28:29,899 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-21 21:28:29,900 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:28:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:30,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:30,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:28:30,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:28:30,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:28:30,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:28:30,253 WARN L141 QuantifierPusher]: treesize reduction 1181, result has 21.4 percent of original size [2021-02-21 21:28:30,257 WARN L147 QuantifierPusher]: treesize reduction 1181, result has 21.4 percent of original size 322 [2021-02-21 21:28:30,465 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 18 [2021-02-21 21:28:30,470 WARN L141 QuantifierPusher]: treesize reduction 225, result has 40.8 percent of original size [2021-02-21 21:28:30,472 WARN L147 QuantifierPusher]: treesize reduction 225, result has 40.8 percent of original size 155 [2021-02-21 21:28:30,628 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 12 [2021-02-21 21:28:30,634 WARN L141 QuantifierPusher]: treesize reduction 353, result has 11.5 percent of original size [2021-02-21 21:28:30,635 WARN L147 QuantifierPusher]: treesize reduction 353, result has 11.5 percent of original size 46 [2021-02-21 21:28:30,710 WARN L141 QuantifierPusher]: treesize reduction 287, result has 5.3 percent of original size [2021-02-21 21:28:30,712 WARN L147 QuantifierPusher]: treesize reduction 287, result has 5.3 percent of original size 16 [2021-02-21 21:28:30,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:30,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:28:30,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:30,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:28:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:28:30,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:28:30,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:30,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:28:30,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-21 21:28:30,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:30,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:30,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-02-21 21:28:30,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 240 [2021-02-21 21:28:31,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:31,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:28:31,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-21 21:28:31,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:31,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:28:31,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-21 21:28:31,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:31,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-21 21:28:31,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:28:31,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:31,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 180 [2021-02-21 21:28:31,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-02-21 21:28:31,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:31,569 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-21 21:28:31,571 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-21 21:28:31,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:28:31,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:31,680 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:31,682 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-21 21:28:31,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-21 21:28:31,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:31,805 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:31,807 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:31,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:28:31,933 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:28:31,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:31,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:31,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:31,942 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-21 21:28:32,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:32,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:32,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:32,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:32,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:28:32,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:32,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:32,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:32,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:32,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-02-21 21:28:32,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:32,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:32,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:32,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-02-21 21:28:32,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-02-21 21:28:32,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:32,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:32,577 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:32,579 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:32,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:32,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:32,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:32,730 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:32,732 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:32,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:32,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:32,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:32,908 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:32,910 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:32,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:33,084 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-21 21:28:33,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:33,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:33,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:33,096 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-21 21:28:33,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:33,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:33,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:33,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:33,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-21 21:28:33,493 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size [2021-02-21 21:28:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:33,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:33,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:33,500 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size 184 [2021-02-21 21:28:33,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:33,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:33,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-21 21:28:33,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-21 21:28:33,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:33,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:33,894 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:33,897 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:33,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:34,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:34,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:34,094 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:34,097 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:34,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:34,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:34,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:28:34,323 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-21 21:28:34,326 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-21 21:28:34,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-21 21:28:34,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:34,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:28:34,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363924927] [2021-02-21 21:28:34,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:28:34,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-02-21 21:28:34,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299617887] [2021-02-21 21:28:34,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-21 21:28:34,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:28:34,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-21 21:28:34,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-02-21 21:28:34,579 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 28 states. [2021-02-21 21:28:35,274 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-02-21 21:28:35,485 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-02-21 21:28:35,724 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-02-21 21:28:36,008 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2021-02-21 21:28:39,929 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-02-21 21:28:40,262 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2021-02-21 21:28:40,703 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 101 [2021-02-21 21:28:41,164 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 97 [2021-02-21 21:28:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:28:41,539 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-02-21 21:28:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-21 21:28:41,541 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-02-21 21:28:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:28:41,542 INFO L225 Difference]: With dead ends: 118 [2021-02-21 21:28:41,543 INFO L226 Difference]: Without dead ends: 113 [2021-02-21 21:28:41,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=417, Invalid=3123, Unknown=0, NotChecked=0, Total=3540 [2021-02-21 21:28:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-21 21:28:41,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-02-21 21:28:41,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-02-21 21:28:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-02-21 21:28:41,691 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 48 [2021-02-21 21:28:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:28:41,691 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-02-21 21:28:41,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-21 21:28:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-02-21 21:28:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-21 21:28:41,696 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:28:41,696 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-02-21 21:28:41,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:28:41,696 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:28:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:28:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1600399971, now seen corresponding path program 7 times [2021-02-21 21:28:41,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:28:41,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859908464] [2021-02-21 21:28:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:28:41,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:41,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:28:41,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:41,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:28:41,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:41,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:28:41,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:28:41,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 21:28:44,315 WARN L202 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-02-21 21:28:44,320 WARN L141 QuantifierPusher]: treesize reduction 30, result has 85.4 percent of original size [2021-02-21 21:28:44,326 WARN L147 QuantifierPusher]: treesize reduction 30, result has 85.4 percent of original size 176 [2021-02-21 21:28:46,590 WARN L202 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-02-21 21:28:46,595 WARN L141 QuantifierPusher]: treesize reduction 32, result has 84.0 percent of original size [2021-02-21 21:28:46,600 WARN L147 QuantifierPusher]: treesize reduction 32, result has 84.0 percent of original size 168 [2021-02-21 21:28:46,601 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:28:46,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 21:28:46,604 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_main_#t~nondet4_171| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateFactory.newSPredicate(PredicateFactory.java:60) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.generateMetaTrace(AcceleratedInterpolationCore.java:359) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:225) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-02-21 21:28:46,609 INFO L168 Benchmark]: Toolchain (without parser) took 151556.38 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.5 MB in the beginning and 92.0 MB in the end (delta: 35.6 MB). Peak memory consumption was 67.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:46,609 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:28:46,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.06 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:46,610 INFO L168 Benchmark]: Boogie Preprocessor took 99.96 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:46,610 INFO L168 Benchmark]: RCFGBuilder took 704.36 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 130.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:46,610 INFO L168 Benchmark]: TraceAbstraction took 150363.42 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 130.1 MB in the beginning and 92.0 MB in the end (delta: 38.1 MB). Peak memory consumption was 69.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:46,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 369.06 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 99.96 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 704.36 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 130.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 150363.42 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 130.1 MB in the beginning and 92.0 MB in the end (delta: 38.1 MB). Peak memory consumption was 69.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_main_#t~nondet4_171| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_main_#t~nondet4_171|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...