/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:03:21,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:03:21,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:03:21,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 19:03:21,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:03:21,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:03:21,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:03:21,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:03:21,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:03:21,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:03:21,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:03:21,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:03:21,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:03:21,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:03:21,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:03:21,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:03:21,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 19:03:21,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:03:21,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:03:21,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:03:21,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 19:03:21,539 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:03:21,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:03:21,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:03:21,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:03:21,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:03:21,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:03:21,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:03:21,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:03:21,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:03:21,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:03:21,548 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:03:21,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:03:21,548 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:03:21,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:03:21,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:03:21,549 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:03:21,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:03:21,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:03:21,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:03:21,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:03:21,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:03:21,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:03:21,551 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:03:22,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:03:22,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:03:22,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:03:22,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:03:22,124 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:03:22,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c [2021-02-23 19:03:22,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a0d386f9/20e7a979fbec4b8ba4661dde7f57bc39/FLAG961b2d9a1 [2021-02-23 19:03:22,775 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:03:22,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c [2021-02-23 19:03:22,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a0d386f9/20e7a979fbec4b8ba4661dde7f57bc39/FLAG961b2d9a1 [2021-02-23 19:03:23,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a0d386f9/20e7a979fbec4b8ba4661dde7f57bc39 [2021-02-23 19:03:23,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:03:23,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:03:23,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:23,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:03:23,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:03:23,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:23" (1/1) ... [2021-02-23 19:03:23,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158c6909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23, skipping insertion in model container [2021-02-23 19:03:23,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:23" (1/1) ... [2021-02-23 19:03:23,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:03:23,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:03:23,382 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c[403,416] [2021-02-23 19:03:23,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:23,415 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:03:23,431 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c[403,416] [2021-02-23 19:03:23,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:23,456 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:03:23,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23 WrapperNode [2021-02-23 19:03:23,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:23,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:03:23,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:03:23,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:03:23,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23" (1/1) ... [2021-02-23 19:03:23,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23" (1/1) ... [2021-02-23 19:03:23,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23" (1/1) ... [2021-02-23 19:03:23,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23" (1/1) ... [2021-02-23 19:03:23,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23" (1/1) ... [2021-02-23 19:03:23,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23" (1/1) ... [2021-02-23 19:03:23,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23" (1/1) ... [2021-02-23 19:03:23,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:03:23,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:03:23,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:03:23,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:03:23,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:03:23,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:03:23,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:03:23,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:03:23,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:03:23,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:03:23,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:03:23,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:03:23,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:03:23,625 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:03:23,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:03:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:03:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:03:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 19:03:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:03:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:03:23,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:03:23,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:03:23,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:03:23,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:03:23,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:03:24,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:03:24,141 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:03:24,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:24 BoogieIcfgContainer [2021-02-23 19:03:24,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:03:24,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:03:24,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:03:24,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:03:24,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:03:23" (1/3) ... [2021-02-23 19:03:24,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505a6441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:24, skipping insertion in model container [2021-02-23 19:03:24,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:23" (2/3) ... [2021-02-23 19:03:24,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505a6441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:24, skipping insertion in model container [2021-02-23 19:03:24,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:24" (3/3) ... [2021-02-23 19:03:24,163 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt3.c [2021-02-23 19:03:24,175 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:03:24,181 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:03:24,203 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:03:24,238 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:03:24,238 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:03:24,238 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:03:24,239 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:03:24,239 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:03:24,239 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:03:24,239 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:03:24,239 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:03:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-02-23 19:03:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-23 19:03:24,279 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:24,280 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] [2021-02-23 19:03:24,281 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash 264394004, now seen corresponding path program 1 times [2021-02-23 19:03:24,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:24,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021249985] [2021-02-23 19:03:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:24,375 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:24,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:24,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:24,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:24,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:24,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:24,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:03:24,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:24,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 19:03:24,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:24,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:03:24,726 WARN L141 QuantifierPusher]: treesize reduction 22, result has 70.3 percent of original size [2021-02-23 19:03:24,729 WARN L147 QuantifierPusher]: treesize reduction 22, result has 70.3 percent of original size 52 [2021-02-23 19:03:24,792 WARN L141 QuantifierPusher]: treesize reduction 23, result has 80.7 percent of original size [2021-02-23 19:03:24,796 WARN L147 QuantifierPusher]: treesize reduction 23, result has 80.7 percent of original size 96 [2021-02-23 19:03:24,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:24,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:24,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:24,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:24,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:24,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:24,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:24,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:24,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:24,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021249985] [2021-02-23 19:03:24,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:24,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:03:24,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021662582] [2021-02-23 19:03:24,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:03:24,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:24,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:03:24,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:03:24,966 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 9 states. [2021-02-23 19:03:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:25,575 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-02-23 19:03:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 19:03:25,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2021-02-23 19:03:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:25,586 INFO L225 Difference]: With dead ends: 76 [2021-02-23 19:03:25,587 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 19:03:25,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-02-23 19:03:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 19:03:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-02-23 19:03:25,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-23 19:03:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-23 19:03:25,660 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2021-02-23 19:03:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:25,661 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-23 19:03:25,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:03:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-23 19:03:25,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-23 19:03:25,664 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:25,665 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] [2021-02-23 19:03:25,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:03:25,666 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:25,667 INFO L82 PathProgramCache]: Analyzing trace with hash -902518074, now seen corresponding path program 1 times [2021-02-23 19:03:25,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:25,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693223942] [2021-02-23 19:03:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:26,428 WARN L202 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-23 19:03:26,449 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:26,455 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:26,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:26,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:26,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:26,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:26,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:26,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:03:26,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 19:03:26,773 WARN L141 QuantifierPusher]: treesize reduction 24, result has 83.4 percent of original size [2021-02-23 19:03:26,780 WARN L147 QuantifierPusher]: treesize reduction 24, result has 83.4 percent of original size 121 [2021-02-23 19:03:26,880 WARN L141 QuantifierPusher]: treesize reduction 24, result has 83.8 percent of original size [2021-02-23 19:03:26,884 WARN L147 QuantifierPusher]: treesize reduction 24, result has 83.8 percent of original size 124 [2021-02-23 19:03:26,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:26,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:26,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:26,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:27,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:27,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:27,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:27,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693223942] [2021-02-23 19:03:27,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:27,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 19:03:27,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278057928] [2021-02-23 19:03:27,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 19:03:27,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:27,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 19:03:27,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-23 19:03:27,055 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2021-02-23 19:03:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:27,767 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-02-23 19:03:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 19:03:27,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2021-02-23 19:03:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:27,769 INFO L225 Difference]: With dead ends: 52 [2021-02-23 19:03:27,770 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 19:03:27,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-02-23 19:03:27,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 19:03:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-02-23 19:03:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-23 19:03:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-02-23 19:03:27,786 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 34 [2021-02-23 19:03:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:27,787 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-02-23 19:03:27,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 19:03:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-02-23 19:03:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-23 19:03:27,788 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:27,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:27,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:03:27,789 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:27,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1287596168, now seen corresponding path program 2 times [2021-02-23 19:03:27,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:27,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623874710] [2021-02-23 19:03:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:29,078 WARN L202 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-23 19:03:34,077 WARN L202 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 3247 DAG size of output: 146 [2021-02-23 19:03:34,082 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:34,088 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:34,258 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 19:03:34,260 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 19:03:34,278 WARN L141 QuantifierPusher]: treesize reduction 10, result has 47.4 percent of original size [2021-02-23 19:03:34,278 WARN L147 QuantifierPusher]: treesize reduction 10, result has 47.4 percent of original size 9 [2021-02-23 19:03:34,284 WARN L141 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size [2021-02-23 19:03:34,285 WARN L147 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size 13 [2021-02-23 19:03:34,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 19:03:34,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-02-23 19:03:34,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-02-23 19:03:34,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:34,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:34,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:34,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:34,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623874710] [2021-02-23 19:03:34,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:34,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:03:34,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969081944] [2021-02-23 19:03:34,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:03:34,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:34,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:03:34,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:03:34,455 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 9 states. [2021-02-23 19:03:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:34,822 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-02-23 19:03:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:03:34,823 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2021-02-23 19:03:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:34,824 INFO L225 Difference]: With dead ends: 56 [2021-02-23 19:03:34,824 INFO L226 Difference]: Without dead ends: 44 [2021-02-23 19:03:34,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-02-23 19:03:34,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-23 19:03:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-02-23 19:03:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-23 19:03:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-02-23 19:03:34,841 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2021-02-23 19:03:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:34,841 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-02-23 19:03:34,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:03:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-02-23 19:03:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 19:03:34,843 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:34,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:34,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:03:34,844 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1964808003, now seen corresponding path program 1 times [2021-02-23 19:03:34,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:34,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10713007] [2021-02-23 19:03:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:36,139 WARN L202 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-23 19:03:36,924 WARN L202 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2021-02-23 19:03:39,292 WARN L202 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 164 DAG size of output: 143 [2021-02-23 19:03:39,297 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:39,299 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:39,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:39,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:39,341 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:03:39,342 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:03:39,359 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:03:39,359 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:03:39,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:39,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:39,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:39,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10713007] [2021-02-23 19:03:39,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:39,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:03:39,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762231076] [2021-02-23 19:03:39,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:03:39,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:39,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:03:39,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:03:39,399 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 5 states. [2021-02-23 19:03:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:39,568 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-02-23 19:03:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:03:39,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2021-02-23 19:03:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:39,570 INFO L225 Difference]: With dead ends: 58 [2021-02-23 19:03:39,570 INFO L226 Difference]: Without dead ends: 46 [2021-02-23 19:03:39,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:03:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-23 19:03:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-02-23 19:03:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-23 19:03:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-02-23 19:03:39,586 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2021-02-23 19:03:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:39,586 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-02-23 19:03:39,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:03:39,587 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-02-23 19:03:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 19:03:39,587 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:39,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:39,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:03:39,588 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1631166749, now seen corresponding path program 1 times [2021-02-23 19:03:39,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:39,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172532223] [2021-02-23 19:03:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:40,791 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-23 19:03:41,575 WARN L202 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-23 19:03:43,237 WARN L202 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 179 DAG size of output: 146 [2021-02-23 19:03:43,247 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:43,249 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:43,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:43,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:43,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:43,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:43,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:43,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:03:43,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 19:03:43,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:03:43,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 19:03:43,525 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size [2021-02-23 19:03:43,527 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size 145 [2021-02-23 19:03:43,628 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-02-23 19:03:43,632 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size 149 [2021-02-23 19:03:43,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:43,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:43,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:43,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:43,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:43,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:43,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172532223] [2021-02-23 19:03:43,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:43,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 19:03:43,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613239089] [2021-02-23 19:03:43,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 19:03:43,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:43,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 19:03:43,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-02-23 19:03:43,795 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 15 states. [2021-02-23 19:03:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:44,603 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-02-23 19:03:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 19:03:44,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2021-02-23 19:03:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:44,610 INFO L225 Difference]: With dead ends: 57 [2021-02-23 19:03:44,610 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 19:03:44,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-02-23 19:03:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 19:03:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-02-23 19:03:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 19:03:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-02-23 19:03:44,642 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 39 [2021-02-23 19:03:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:44,642 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-02-23 19:03:44,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 19:03:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-02-23 19:03:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 19:03:44,646 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:44,646 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:44,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:03:44,648 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1213937073, now seen corresponding path program 2 times [2021-02-23 19:03:44,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:44,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946811538] [2021-02-23 19:03:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:45,331 WARN L202 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-23 19:03:47,280 WARN L202 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 920 DAG size of output: 96 [2021-02-23 19:03:50,424 WARN L202 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 1250 DAG size of output: 110 [2021-02-23 19:03:52,685 WARN L202 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 1231 DAG size of output: 128 [2021-02-23 19:03:52,689 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:52,690 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:52,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:52,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:52,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:52,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:03:52,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:52,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:52,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:52,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-23 19:03:52,787 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-23 19:03:52,790 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 111 [2021-02-23 19:03:52,820 WARN L141 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size [2021-02-23 19:03:52,824 WARN L147 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size 92 [2021-02-23 19:03:52,860 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:03:52,861 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:03:52,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:52,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:52,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:52,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:52,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:52,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946811538] [2021-02-23 19:03:52,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:52,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 19:03:52,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23244960] [2021-02-23 19:03:52,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 19:03:52,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:52,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 19:03:52,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:03:52,917 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 7 states. [2021-02-23 19:03:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:53,631 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-02-23 19:03:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:03:53,632 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2021-02-23 19:03:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:53,635 INFO L225 Difference]: With dead ends: 65 [2021-02-23 19:03:53,636 INFO L226 Difference]: Without dead ends: 53 [2021-02-23 19:03:53,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-23 19:03:53,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-23 19:03:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-02-23 19:03:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-23 19:03:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-02-23 19:03:53,674 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2021-02-23 19:03:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:53,677 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-02-23 19:03:53,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 19:03:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-02-23 19:03:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 19:03:53,681 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:53,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:53,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 19:03:53,682 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:53,684 INFO L82 PathProgramCache]: Analyzing trace with hash 318623942, now seen corresponding path program 1 times [2021-02-23 19:03:53,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:53,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413454066] [2021-02-23 19:03:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:55,013 WARN L202 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 901 DAG size of output: 89 [2021-02-23 19:03:57,754 WARN L202 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 2936 DAG size of output: 96 [2021-02-23 19:04:01,343 WARN L202 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 2935 DAG size of output: 95 [2021-02-23 19:04:02,508 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 186 DAG size of output: 110 [2021-02-23 19:04:16,994 WARN L202 SmtUtils]: Spent 14.44 s on a formula simplification. DAG size of input: 9242 DAG size of output: 141 [2021-02-23 19:04:16,998 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:17,000 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:17,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:17,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:17,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:17,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:04:17,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:17,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:04:17,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 19:04:17,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:04:17,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 19:04:17,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 19:04:17,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 19:04:17,295 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size [2021-02-23 19:04:17,297 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size 146 [2021-02-23 19:04:17,414 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-02-23 19:04:17,416 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size 150 [2021-02-23 19:04:17,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:17,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:17,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:17,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:17,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:17,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:17,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413454066] [2021-02-23 19:04:17,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:17,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 19:04:17,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638858604] [2021-02-23 19:04:17,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 19:04:17,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:17,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 19:04:17,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-02-23 19:04:17,619 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 17 states. [2021-02-23 19:04:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:18,786 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-02-23 19:04:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 19:04:18,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2021-02-23 19:04:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:18,788 INFO L225 Difference]: With dead ends: 68 [2021-02-23 19:04:18,788 INFO L226 Difference]: Without dead ends: 62 [2021-02-23 19:04:18,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-02-23 19:04:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-23 19:04:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-02-23 19:04:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-23 19:04:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-02-23 19:04:18,808 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 44 [2021-02-23 19:04:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:18,808 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-02-23 19:04:18,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 19:04:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-02-23 19:04:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 19:04:18,809 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:18,809 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:18,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 19:04:18,810 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:18,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2029585032, now seen corresponding path program 2 times [2021-02-23 19:04:18,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:18,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240208029] [2021-02-23 19:04:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:19,585 WARN L202 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-23 19:04:20,478 WARN L202 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-23 19:04:21,374 WARN L202 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2021-02-23 19:04:22,268 WARN L202 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2021-02-23 19:04:23,336 WARN L202 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 185 DAG size of output: 96 [2021-02-23 19:04:24,599 WARN L202 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 186 DAG size of output: 110 [2021-02-23 19:04:26,127 WARN L202 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 179 DAG size of output: 128 [2021-02-23 19:04:26,129 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:26,130 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:26,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:26,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:26,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:26,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:04:26,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:26,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:04:26,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:04:26,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 19:04:26,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:04:26,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 19:04:26,376 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-23 19:04:26,377 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 34 [2021-02-23 19:04:26,429 WARN L141 QuantifierPusher]: treesize reduction 7, result has 84.1 percent of original size [2021-02-23 19:04:26,431 WARN L147 QuantifierPusher]: treesize reduction 7, result has 84.1 percent of original size 37 [2021-02-23 19:04:26,468 WARN L141 QuantifierPusher]: treesize reduction 7, result has 85.4 percent of original size [2021-02-23 19:04:26,469 WARN L147 QuantifierPusher]: treesize reduction 7, result has 85.4 percent of original size 41 [2021-02-23 19:04:26,512 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size [2021-02-23 19:04:26,515 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size 146 [2021-02-23 19:04:26,644 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-02-23 19:04:26,645 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size 150 [2021-02-23 19:04:26,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:26,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:26,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:26,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:26,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:26,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240208029] [2021-02-23 19:04:26,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:26,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-23 19:04:26,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034304943] [2021-02-23 19:04:26,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-23 19:04:26,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:26,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-23 19:04:26,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-23 19:04:26,883 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2021-02-23 19:04:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:28,342 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2021-02-23 19:04:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 19:04:28,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2021-02-23 19:04:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:28,345 INFO L225 Difference]: With dead ends: 88 [2021-02-23 19:04:28,345 INFO L226 Difference]: Without dead ends: 64 [2021-02-23 19:04:28,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-02-23 19:04:28,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-23 19:04:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-02-23 19:04:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-23 19:04:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-02-23 19:04:28,364 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 48 [2021-02-23 19:04:28,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:28,365 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-02-23 19:04:28,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-23 19:04:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-02-23 19:04:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-23 19:04:28,366 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:28,366 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:28,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 19:04:28,366 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1147568426, now seen corresponding path program 3 times [2021-02-23 19:04:28,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:28,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118222495] [2021-02-23 19:04:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:29,105 WARN L202 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-23 19:04:30,052 WARN L202 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-23 19:04:33,267 WARN L202 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 2935 DAG size of output: 95 [2021-02-23 19:04:36,570 WARN L202 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 2937 DAG size of output: 97 [2021-02-23 19:04:38,915 WARN L202 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 166 DAG size of output: 126 [2021-02-23 19:04:41,171 WARN L202 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 186 DAG size of output: 126 [2021-02-23 19:04:59,815 WARN L202 SmtUtils]: Spent 18.58 s on a formula simplification. DAG size of input: 9933 DAG size of output: 142 [2021-02-23 19:04:59,817 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:59,818 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:59,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:59,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:59,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:59,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:04:59,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:59,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:59,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:59,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 19:04:59,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:59,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 19:05:00,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:00,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 19:05:00,046 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.4 percent of original size [2021-02-23 19:05:00,049 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.4 percent of original size 163 [2021-02-23 19:05:00,121 WARN L141 QuantifierPusher]: treesize reduction 7, result has 95.1 percent of original size [2021-02-23 19:05:00,123 WARN L147 QuantifierPusher]: treesize reduction 7, result has 95.1 percent of original size 137 [2021-02-23 19:05:00,182 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:05:00,183 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:05:00,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:00,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:00,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:00,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:00,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:00,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:00,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:05:00,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118222495] [2021-02-23 19:05:00,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:00,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 19:05:00,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815410622] [2021-02-23 19:05:00,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 19:05:00,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:00,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 19:05:00,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:05:00,254 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 11 states. [2021-02-23 19:05:01,045 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-23 19:05:01,687 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-23 19:05:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:02,454 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2021-02-23 19:05:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 19:05:02,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2021-02-23 19:05:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:02,457 INFO L225 Difference]: With dead ends: 99 [2021-02-23 19:05:02,457 INFO L226 Difference]: Without dead ends: 87 [2021-02-23 19:05:02,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-02-23 19:05:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-23 19:05:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2021-02-23 19:05:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-23 19:05:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-02-23 19:05:02,494 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2021-02-23 19:05:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:02,495 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-02-23 19:05:02,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 19:05:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-02-23 19:05:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-23 19:05:02,496 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:02,496 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:05:02,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 19:05:02,496 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash 510850379, now seen corresponding path program 4 times [2021-02-23 19:05:02,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:02,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87492025] [2021-02-23 19:05:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:02,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:02,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 19:05:03,345 WARN L202 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-23 19:05:03,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:03,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 19:05:04,366 WARN L202 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-23 19:05:04,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:04,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 19:05:07,691 WARN L202 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 2935 DAG size of output: 95 [2021-02-23 19:05:07,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:07,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 19:05:26,733 WARN L202 SmtUtils]: Spent 18.92 s on a formula simplification. DAG size of input: 9685 DAG size of output: 123 [2021-02-23 19:05:26,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:26,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 19:05:28,185 WARN L202 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 186 DAG size of output: 110 [2021-02-23 19:05:28,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:28,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 19:05:30,198 WARN L202 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 179 DAG size of output: 146