/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/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:03:30,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:03:30,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:03:30,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 19:03:30,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 19:03:30,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 19:03:30,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 19:03:30,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 19:03:30,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 19:03:30,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 19:03:30,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 19:03:30,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 19:03:30,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:03:30,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:03:30,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:03:30,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:03:30,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:03:30,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:03:30,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:03:30,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:03:30,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:03:30,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:03:30,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:03:30,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:03:30,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 19:03:30,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:03:30,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:03:30,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:03:30,331 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 19:03:30,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:03:30,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:03:30,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:03:30,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:03:30,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:03:30,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:03:30,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:03:30,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:03:30,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:03:30,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:03:30,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:03:30,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:03:30,356 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:03:30,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:03:30,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:03:30,357 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:03:30,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:03:30,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:03:30,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:03:30,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:03:30,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:03:30,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:03:30,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:03:30,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:03:30,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:03:30,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:03:30,741 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:03:30,742 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:03:30,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2021-02-23 19:03:30,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b469e07e/ff6de44c74a14b07b8a86afec8110521/FLAGb69e3e016 [2021-02-23 19:03:31,491 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:03:31,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2021-02-23 19:03:31,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b469e07e/ff6de44c74a14b07b8a86afec8110521/FLAGb69e3e016 [2021-02-23 19:03:31,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b469e07e/ff6de44c74a14b07b8a86afec8110521 [2021-02-23 19:03:31,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:03:31,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:03:31,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:31,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:03:31,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:03:31,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:31" (1/1) ... [2021-02-23 19:03:31,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338c0586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:31, skipping insertion in model container [2021-02-23 19:03:31,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:31" (1/1) ... [2021-02-23 19:03:31,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:03:31,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:03:32,053 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/sumt7.c[403,416] [2021-02-23 19:03:32,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:32,082 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:03:32,097 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/sumt7.c[403,416] [2021-02-23 19:03:32,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:32,123 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:03:32,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32 WrapperNode [2021-02-23 19:03:32,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:32,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:03:32,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:03:32,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:03:32,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32" (1/1) ... [2021-02-23 19:03:32,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32" (1/1) ... [2021-02-23 19:03:32,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32" (1/1) ... [2021-02-23 19:03:32,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32" (1/1) ... [2021-02-23 19:03:32,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32" (1/1) ... [2021-02-23 19:03:32,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32" (1/1) ... [2021-02-23 19:03:32,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32" (1/1) ... [2021-02-23 19:03:32,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:03:32,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:03:32,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:03:32,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:03:32,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32" (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 19:03:32,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:03:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:03:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:03:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:03:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:03:32,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:03:32,339 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:03:32,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:03:32,340 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:03:32,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:03:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:03:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:03:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:03:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:03:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:03:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:03:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:03:32,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:03:32,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:03:32,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:03:32,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:03:32,922 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:03:32,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:32 BoogieIcfgContainer [2021-02-23 19:03:32,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:03:32,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:03:32,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:03:32,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:03:32,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:03:31" (1/3) ... [2021-02-23 19:03:32,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159089e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:32, skipping insertion in model container [2021-02-23 19:03:32,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:32" (2/3) ... [2021-02-23 19:03:32,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159089e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:32, skipping insertion in model container [2021-02-23 19:03:32,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:32" (3/3) ... [2021-02-23 19:03:32,934 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt7.c [2021-02-23 19:03:32,942 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:03:32,948 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:03:32,973 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:03:33,001 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:03:33,002 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:03:33,002 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:03:33,002 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:03:33,002 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:03:33,002 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:03:33,002 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:03:33,003 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:03:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2021-02-23 19:03:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-23 19:03:33,032 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:33,033 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 19:03:33,034 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:33,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1439556865, now seen corresponding path program 1 times [2021-02-23 19:03:33,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:33,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707053376] [2021-02-23 19:03:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:33,134 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:33,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:33,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:33,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:33,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:33,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:33,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:03:33,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:03:33,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:03:33,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:03:33,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:03:33,906 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.0 percent of original size [2021-02-23 19:03:33,913 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.0 percent of original size 156 [2021-02-23 19:03:34,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:34,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:34,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:34,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:34,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:34,157 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 19:03:34,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707053376] [2021-02-23 19:03:34,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:34,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 19:03:34,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639422974] [2021-02-23 19:03:34,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 19:03:34,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:34,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 19:03:34,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-23 19:03:34,184 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 15 states. [2021-02-23 19:03:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:35,683 INFO L93 Difference]: Finished difference Result 168 states and 229 transitions. [2021-02-23 19:03:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 19:03:35,685 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2021-02-23 19:03:35,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:35,697 INFO L225 Difference]: With dead ends: 168 [2021-02-23 19:03:35,697 INFO L226 Difference]: Without dead ends: 119 [2021-02-23 19:03:35,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-02-23 19:03:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-23 19:03:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 57. [2021-02-23 19:03:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-23 19:03:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-02-23 19:03:35,770 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 34 [2021-02-23 19:03:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:35,771 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-02-23 19:03:35,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 19:03:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-02-23 19:03:35,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 19:03:35,773 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:35,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:35,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:03:35,774 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash 804824585, now seen corresponding path program 1 times [2021-02-23 19:03:35,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:35,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831283268] [2021-02-23 19:03:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:40,551 WARN L202 SmtUtils]: Spent 4.73 s on a formula simplification. DAG size of input: 538 DAG size of output: 246 [2021-02-23 19:03:40,569 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:40,572 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:40,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:40,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:40,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:40,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:40,739 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-23 19:03:40,741 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 91 [2021-02-23 19:03:40,807 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:03:40,808 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-23 19:03:40,823 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-23 19:03:40,824 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-23 19:03:40,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:40,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:40,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:40,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:40,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:40,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:03:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:40,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:40,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:40,885 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 19:03:40,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831283268] [2021-02-23 19:03:40,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:40,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:03:40,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640297478] [2021-02-23 19:03:40,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:03:40,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:40,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:03:40,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:03:40,889 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 5 states. [2021-02-23 19:03:41,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:41,235 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-02-23 19:03:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:03:41,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-02-23 19:03:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:41,237 INFO L225 Difference]: With dead ends: 93 [2021-02-23 19:03:41,238 INFO L226 Difference]: Without dead ends: 71 [2021-02-23 19:03:41,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:03:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-23 19:03:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2021-02-23 19:03:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-23 19:03:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-02-23 19:03:41,264 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 43 [2021-02-23 19:03:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:41,264 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-02-23 19:03:41,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:03:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-02-23 19:03:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 19:03:41,266 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:41,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:41,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:03:41,267 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:41,268 INFO L82 PathProgramCache]: Analyzing trace with hash -603670227, now seen corresponding path program 1 times [2021-02-23 19:03:41,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:41,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561710718] [2021-02-23 19:03:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:07,548 WARN L202 SmtUtils]: Spent 26.17 s on a formula simplification. DAG size of input: 12630 DAG size of output: 247 [2021-02-23 19:04:07,555 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:07,560 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:07,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:07,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:07,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:07,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:07,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:07,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-02-23 19:04:07,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:07,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:07,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:07,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:07,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:07,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:04:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:07,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:07,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:07,770 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 19:04:07,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561710718] [2021-02-23 19:04:07,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:07,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:04:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386057813] [2021-02-23 19:04:07,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:04:07,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:04:07,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:04:07,773 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 5 states. [2021-02-23 19:04:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:08,066 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-02-23 19:04:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:04:08,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2021-02-23 19:04:08,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:08,068 INFO L225 Difference]: With dead ends: 83 [2021-02-23 19:04:08,069 INFO L226 Difference]: Without dead ends: 61 [2021-02-23 19:04:08,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:04:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-23 19:04:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-02-23 19:04:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-23 19:04:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-02-23 19:04:08,096 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2021-02-23 19:04:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:08,097 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-02-23 19:04:08,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:04:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-02-23 19:04:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 19:04:08,099 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:08,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:08,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:04:08,099 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:08,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1145561533, now seen corresponding path program 1 times [2021-02-23 19:04:08,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:08,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343002283] [2021-02-23 19:04:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:13,752 WARN L202 SmtUtils]: Spent 5.64 s on a formula simplification. DAG size of input: 538 DAG size of output: 274 [2021-02-23 19:04:13,757 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:13,758 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:13,912 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 19:04:13,913 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 19:04:13,932 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-23 19:04:13,933 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-23 19:04:13,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:13,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:13,973 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.4 percent of original size [2021-02-23 19:04:13,975 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.4 percent of original size 124 [2021-02-23 19:04:14,071 WARN L141 QuantifierPusher]: treesize reduction 9, result has 92.6 percent of original size [2021-02-23 19:04:14,073 WARN L147 QuantifierPusher]: treesize reduction 9, result has 92.6 percent of original size 113 [2021-02-23 19:04:14,097 WARN L141 QuantifierPusher]: treesize reduction 9, result has 91.4 percent of original size [2021-02-23 19:04:14,098 WARN L147 QuantifierPusher]: treesize reduction 9, result has 91.4 percent of original size 96 [2021-02-23 19:04:14,143 WARN L141 QuantifierPusher]: treesize reduction 49, result has 63.7 percent of original size [2021-02-23 19:04:14,144 WARN L147 QuantifierPusher]: treesize reduction 49, result has 63.7 percent of original size 86 [2021-02-23 19:04:14,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:14,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:14,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:14,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:14,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:14,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:14,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:14,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:04:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:14,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:14,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:14,238 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 19:04:14,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343002283] [2021-02-23 19:04:14,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:14,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:04:14,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27235950] [2021-02-23 19:04:14,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:04:14,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:14,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:04:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:04:14,242 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 9 states. [2021-02-23 19:04:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:14,895 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2021-02-23 19:04:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:04:14,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2021-02-23 19:04:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:14,897 INFO L225 Difference]: With dead ends: 91 [2021-02-23 19:04:14,897 INFO L226 Difference]: Without dead ends: 69 [2021-02-23 19:04:14,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-23 19:04:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-23 19:04:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-02-23 19:04:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-23 19:04:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-02-23 19:04:14,924 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 45 [2021-02-23 19:04:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:14,924 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-02-23 19:04:14,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:04:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-02-23 19:04:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 19:04:14,926 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:14,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:14,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:04:14,927 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:14,927 INFO L82 PathProgramCache]: Analyzing trace with hash -592547929, now seen corresponding path program 1 times [2021-02-23 19:04:14,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:14,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527199360] [2021-02-23 19:04:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:19,600 WARN L202 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 538 DAG size of output: 228 [2021-02-23 19:04:19,606 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:19,607 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:19,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:19,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:19,683 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:04:19,686 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:04:19,703 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:04:19,705 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:04:19,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:19,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:19,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:19,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:04:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:19,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:19,752 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 19:04:19,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527199360] [2021-02-23 19:04:19,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:19,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:04:19,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120193149] [2021-02-23 19:04:19,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:04:19,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:19,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:04:19,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:04:19,754 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 5 states. [2021-02-23 19:04:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:20,013 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-02-23 19:04:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:04:20,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2021-02-23 19:04:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:20,015 INFO L225 Difference]: With dead ends: 90 [2021-02-23 19:04:20,015 INFO L226 Difference]: Without dead ends: 68 [2021-02-23 19:04:20,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 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 19:04:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-23 19:04:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-02-23 19:04:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-23 19:04:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-02-23 19:04:20,041 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 46 [2021-02-23 19:04:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:20,042 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-02-23 19:04:20,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:04:20,042 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-02-23 19:04:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-23 19:04:20,043 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:20,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:20,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:04:20,043 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash -457220483, now seen corresponding path program 1 times [2021-02-23 19:04:20,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:20,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338778325] [2021-02-23 19:04:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:25,903 WARN L202 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 538 DAG size of output: 272 [2021-02-23 19:04:25,909 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:25,910 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:25,970 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 19:04:25,971 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 19:04:25,990 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-23 19:04:25,991 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-23 19:04:26,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:26,028 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.2 percent of original size [2021-02-23 19:04:26,030 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.2 percent of original size 118 [2021-02-23 19:04:26,070 WARN L141 QuantifierPusher]: treesize reduction 7, result has 93.9 percent of original size [2021-02-23 19:04:26,073 WARN L147 QuantifierPusher]: treesize reduction 7, result has 93.9 percent of original size 108 [2021-02-23 19:04:26,096 WARN L141 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size [2021-02-23 19:04:26,098 WARN L147 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size 92 [2021-02-23 19:04:26,127 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:04:26,128 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:04:26,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:26,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:26,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:26,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:26,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:26,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:04:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [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 1 [2021-02-23 19:04:26,214 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 19:04:26,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338778325] [2021-02-23 19:04:26,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:26,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:04:26,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844443527] [2021-02-23 19:04:26,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:04:26,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:26,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:04:26,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:04:26,217 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 9 states. [2021-02-23 19:04:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:26,784 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-02-23 19:04:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:04:26,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2021-02-23 19:04:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:26,786 INFO L225 Difference]: With dead ends: 86 [2021-02-23 19:04:26,786 INFO L226 Difference]: Without dead ends: 64 [2021-02-23 19:04:26,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-23 19:04:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-23 19:04:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-23 19:04:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-23 19:04:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-02-23 19:04:26,811 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 47 [2021-02-23 19:04:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:26,812 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-02-23 19:04:26,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:04:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-02-23 19:04:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 19:04:26,813 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:26,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:26,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 19:04:26,814 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash -385262047, now seen corresponding path program 1 times [2021-02-23 19:04:26,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:26,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117357456] [2021-02-23 19:04:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:56,668 WARN L202 SmtUtils]: Spent 29.77 s on a formula simplification. DAG size of input: 12630 DAG size of output: 246 [2021-02-23 19:04:56,671 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:56,673 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:56,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:56,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:56,714 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:04:56,715 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:04:56,738 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:04:56,739 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:04:56,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:56,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:56,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:56,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:04:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:56,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:56,785 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 19:04:56,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117357456] [2021-02-23 19:04:56,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:56,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:04:56,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828214370] [2021-02-23 19:04:56,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:04:56,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:04:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:04:56,788 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 5 states. [2021-02-23 19:04:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:57,069 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2021-02-23 19:04:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:04:57,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2021-02-23 19:04:57,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:57,071 INFO L225 Difference]: With dead ends: 88 [2021-02-23 19:04:57,071 INFO L226 Difference]: Without dead ends: 66 [2021-02-23 19:04:57,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:04:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-23 19:04:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-02-23 19:04:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-23 19:04:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-02-23 19:04:57,098 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 48 [2021-02-23 19:04:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:57,098 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-02-23 19:04:57,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:04:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-02-23 19:04:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 19:04:57,099 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:57,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:57,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 19:04:57,100 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:57,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1931830847, now seen corresponding path program 1 times [2021-02-23 19:04:57,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:57,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129943549] [2021-02-23 19:04:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:23,645 WARN L202 SmtUtils]: Spent 26.46 s on a formula simplification. DAG size of input: 12630 DAG size of output: 274 [2021-02-23 19:05:23,650 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:05:23,651 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:23,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:23,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:23,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:23,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:05:23,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:05:23,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:05:23,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:05:23,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:05:23,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:05:23,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:05:23,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:05:23,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:23,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 19:05:23,976 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.4 percent of original size [2021-02-23 19:05:23,978 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.4 percent of original size 161 [2021-02-23 19:05:24,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:24,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:24,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:24,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:24,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:24,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:24,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:24,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:24,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:24,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:05:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:24,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:24,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:24,193 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 19:05:24,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129943549] [2021-02-23 19:05:24,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:24,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 19:05:24,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532073869] [2021-02-23 19:05:24,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 19:05:24,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 19:05:24,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-02-23 19:05:24,196 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 17 states. [2021-02-23 19:05:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:25,498 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2021-02-23 19:05:25,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 19:05:25,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2021-02-23 19:05:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:25,500 INFO L225 Difference]: With dead ends: 103 [2021-02-23 19:05:25,500 INFO L226 Difference]: Without dead ends: 101 [2021-02-23 19:05:25,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-02-23 19:05:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-23 19:05:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2021-02-23 19:05:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-23 19:05:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-02-23 19:05:25,529 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 48 [2021-02-23 19:05:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:25,529 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-02-23 19:05:25,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 19:05:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-02-23 19:05:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-23 19:05:25,530 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:25,530 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:05:25,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 19:05:25,531 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:25,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:25,532 INFO L82 PathProgramCache]: Analyzing trace with hash 262513031, now seen corresponding path program 2 times [2021-02-23 19:05:25,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:25,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707179498] [2021-02-23 19:05:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:38,714 WARN L202 SmtUtils]: Spent 13.13 s on a formula simplification. DAG size of input: 4566 DAG size of output: 274 [2021-02-23 19:05:54,909 WARN L202 SmtUtils]: Spent 13.51 s on a formula simplification. DAG size of input: 588 DAG size of output: 276 [2021-02-23 19:05:54,914 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:05:54,915 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:55,028 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 19:05:55,030 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 19:05:55,074 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-23 19:05:55,076 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-23 19:05:55,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:55,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:05:55,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:55,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 19:05:55,187 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:05:55,189 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 101 [2021-02-23 19:05:55,303 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-23 19:05:55,304 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 107 [2021-02-23 19:05:55,352 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:05:55,354 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-23 19:05:55,396 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-23 19:05:55,397 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-23 19:05:55,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:55,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:55,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:55,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:55,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:55,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:55,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:55,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 19:05:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:55,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:55,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:55,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 19:05:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:55,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:55,518 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:55,531 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 19:05:55,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707179498] [2021-02-23 19:05:55,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:55,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:05:55,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261527531] [2021-02-23 19:05:55,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:05:55,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:55,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:05:55,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:05:55,534 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 9 states. [2021-02-23 19:05:55,818 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-23 19:05:56,030 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-23 19:05:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:56,763 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2021-02-23 19:05:56,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 19:05:56,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2021-02-23 19:05:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:56,766 INFO L225 Difference]: With dead ends: 107 [2021-02-23 19:05:56,766 INFO L226 Difference]: Without dead ends: 85 [2021-02-23 19:05:56,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-02-23 19:05:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-23 19:05:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-02-23 19:05:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-23 19:05:56,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-02-23 19:05:56,794 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 57 [2021-02-23 19:05:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:56,794 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-02-23 19:05:56,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:05:56,795 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-02-23 19:05:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 19:05:56,796 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:56,796 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:05:56,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 19:05:56,796 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash -235459217, now seen corresponding path program 1 times [2021-02-23 19:05:56,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:56,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512714710] [2021-02-23 19:05:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:06:04,656 WARN L202 SmtUtils]: Spent 7.83 s on a formula simplification. DAG size of input: 538 DAG size of output: 274