/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:49:34,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:49:34,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:49:34,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:49:34,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:49:34,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:49:34,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:49:34,826 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:49:34,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:49:34,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:49:34,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:49:34,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:49:34,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:49:34,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:49:34,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:49:34,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:49:34,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:49:34,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:49:34,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:49:34,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:49:34,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:49:34,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:49:34,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:49:34,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:49:34,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:49:34,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:49:34,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:49:34,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:49:34,907 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 18:49:34,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:49:34,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:49:34,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:49:34,942 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:49:34,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:49:34,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:49:34,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:49:34,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:49:34,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:49:34,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:49:34,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:49:34,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:49:34,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:49:34,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:49:34,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:49:34,946 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:49:34,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:49:34,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:49:34,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:49:34,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:49:34,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:49:34,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:49:34,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:49:35,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:49:35,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:49:35,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:49:35,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:49:35,399 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:49:35,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2021-02-23 18:49:35,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c86d862/dbb48a029c7b42ffa75a73d2fd4eef63/FLAG1aa1b7357 [2021-02-23 18:49:36,253 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:49:36,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2021-02-23 18:49:36,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c86d862/dbb48a029c7b42ffa75a73d2fd4eef63/FLAG1aa1b7357 [2021-02-23 18:49:36,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c86d862/dbb48a029c7b42ffa75a73d2fd4eef63 [2021-02-23 18:49:36,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:49:36,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:49:36,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:49:36,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:49:36,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:49:36,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:49:36" (1/1) ... [2021-02-23 18:49:36,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf4e096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36, skipping insertion in model container [2021-02-23 18:49:36,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:49:36" (1/1) ... [2021-02-23 18:49:36,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:49:36,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:49:36,843 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c[327,340] [2021-02-23 18:49:36,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:49:36,867 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:49:36,881 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c[327,340] [2021-02-23 18:49:36,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:49:36,902 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:49:36,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36 WrapperNode [2021-02-23 18:49:36,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:49:36,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:49:36,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:49:36,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:49:36,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36" (1/1) ... [2021-02-23 18:49:36,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36" (1/1) ... [2021-02-23 18:49:36,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36" (1/1) ... [2021-02-23 18:49:36,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36" (1/1) ... [2021-02-23 18:49:36,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36" (1/1) ... [2021-02-23 18:49:36,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36" (1/1) ... [2021-02-23 18:49:36,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36" (1/1) ... [2021-02-23 18:49:36,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:49:36,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:49:36,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:49:36,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:49:36,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36" (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 18:49:37,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:49:37,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:49:37,049 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:49:37,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:49:37,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:49:37,049 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:49:37,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:49:37,050 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:49:37,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:49:37,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:49:37,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:49:37,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:49:37,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:49:37,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:49:37,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:49:37,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:49:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:49:37,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:49:37,345 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:49:37,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:49:37 BoogieIcfgContainer [2021-02-23 18:49:37,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:49:37,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:49:37,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:49:37,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:49:37,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:49:36" (1/3) ... [2021-02-23 18:49:37,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de90447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:49:37, skipping insertion in model container [2021-02-23 18:49:37,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:36" (2/3) ... [2021-02-23 18:49:37,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de90447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:49:37, skipping insertion in model container [2021-02-23 18:49:37,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:49:37" (3/3) ... [2021-02-23 18:49:37,375 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2021-02-23 18:49:37,401 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:49:37,414 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:49:37,475 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:49:37,590 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:49:37,590 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:49:37,590 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:49:37,591 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:49:37,591 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:49:37,591 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:49:37,591 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:49:37,591 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:49:37,623 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-02-23 18:49:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 18:49:37,640 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:37,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:49:37,642 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash 645207053, now seen corresponding path program 1 times [2021-02-23 18:49:37,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:37,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518893535] [2021-02-23 18:49:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:37,777 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:38,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:38,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:38,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:49:38,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:38,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:38,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:38,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:38,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:38,242 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 18:49:38,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518893535] [2021-02-23 18:49:38,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:38,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:49:38,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295957585] [2021-02-23 18:49:38,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:49:38,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:49:38,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:49:38,275 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2021-02-23 18:49:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:38,483 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-02-23 18:49:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:49:38,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-02-23 18:49:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:38,497 INFO L225 Difference]: With dead ends: 45 [2021-02-23 18:49:38,498 INFO L226 Difference]: Without dead ends: 27 [2021-02-23 18:49:38,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:49:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-23 18:49:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-02-23 18:49:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-23 18:49:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-02-23 18:49:38,557 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 19 [2021-02-23 18:49:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:38,557 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-02-23 18:49:38,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:49:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-02-23 18:49:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 18:49:38,559 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:38,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:49:38,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:49:38,560 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:38,561 INFO L82 PathProgramCache]: Analyzing trace with hash -567626551, now seen corresponding path program 1 times [2021-02-23 18:49:38,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:38,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230656064] [2021-02-23 18:49:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:38,689 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:49:38,692 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:38,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:38,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:38,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:38,848 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:49:38,854 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:49:38,889 WARN L141 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-02-23 18:49:38,891 WARN L147 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size 11 [2021-02-23 18:49:38,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:38,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:38,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:38,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:38,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:38,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:38,980 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 18:49:38,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230656064] [2021-02-23 18:49:38,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:38,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:49:38,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760811569] [2021-02-23 18:49:38,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:49:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:38,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:49:38,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:49:38,985 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 8 states. [2021-02-23 18:49:39,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:39,236 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-02-23 18:49:39,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:49:39,237 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2021-02-23 18:49:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:39,239 INFO L225 Difference]: With dead ends: 37 [2021-02-23 18:49:39,239 INFO L226 Difference]: Without dead ends: 32 [2021-02-23 18:49:39,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-02-23 18:49:39,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-23 18:49:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-02-23 18:49:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-23 18:49:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-02-23 18:49:39,255 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 24 [2021-02-23 18:49:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:39,256 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-02-23 18:49:39,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:49:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-02-23 18:49:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 18:49:39,257 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:39,257 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:49:39,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:49:39,258 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash -137877107, now seen corresponding path program 2 times [2021-02-23 18:49:39,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:39,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505243978] [2021-02-23 18:49:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:39,444 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:49:39,447 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:39,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:39,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:39,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:39,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:39,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:39,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:39,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:39,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:39,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:39,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:39,565 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:49:39,568 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:49:39,593 WARN L141 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-02-23 18:49:39,594 WARN L147 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size 11 [2021-02-23 18:49:39,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:39,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:39,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:39,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:39,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:39,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:39,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:39,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:39,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:39,669 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 18:49:39,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505243978] [2021-02-23 18:49:39,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:39,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 18:49:39,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018575970] [2021-02-23 18:49:39,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 18:49:39,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:39,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 18:49:39,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:49:39,673 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 10 states. [2021-02-23 18:49:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:40,018 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-02-23 18:49:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 18:49:40,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2021-02-23 18:49:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:40,020 INFO L225 Difference]: With dead ends: 42 [2021-02-23 18:49:40,020 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 18:49:40,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-02-23 18:49:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 18:49:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-02-23 18:49:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-23 18:49:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-02-23 18:49:40,035 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 29 [2021-02-23 18:49:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:40,035 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-02-23 18:49:40,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 18:49:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-02-23 18:49:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-23 18:49:40,037 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:40,037 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:49:40,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:49:40,037 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:40,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1729556663, now seen corresponding path program 3 times [2021-02-23 18:49:40,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:40,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415615090] [2021-02-23 18:49:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:40,195 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:49:40,197 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:40,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:40,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:40,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:40,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:40,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:40,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:40,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:40,322 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:49:40,323 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:49:40,349 WARN L141 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-02-23 18:49:40,350 WARN L147 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size 11 [2021-02-23 18:49:40,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:40,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:40,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:40,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:40,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:40,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:40,417 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 18:49:40,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415615090] [2021-02-23 18:49:40,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:40,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 18:49:40,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641429145] [2021-02-23 18:49:40,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 18:49:40,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:40,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 18:49:40,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-23 18:49:40,420 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2021-02-23 18:49:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:40,902 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-02-23 18:49:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 18:49:40,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2021-02-23 18:49:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:40,904 INFO L225 Difference]: With dead ends: 47 [2021-02-23 18:49:40,904 INFO L226 Difference]: Without dead ends: 42 [2021-02-23 18:49:40,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-02-23 18:49:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-23 18:49:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-02-23 18:49:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-23 18:49:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-02-23 18:49:40,919 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 34 [2021-02-23 18:49:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:40,919 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-02-23 18:49:40,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 18:49:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-02-23 18:49:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 18:49:40,921 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:40,921 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:49:40,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:49:40,922 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:40,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1302438131, now seen corresponding path program 4 times [2021-02-23 18:49:40,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:40,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106238377] [2021-02-23 18:49:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:41,086 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:49:41,089 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:41,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:41,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:41,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:41,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:41,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:41,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:41,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:41,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:41,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:41,245 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:49:41,247 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:49:41,273 WARN L141 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-02-23 18:49:41,275 WARN L147 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size 11 [2021-02-23 18:49:41,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:41,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:41,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:41,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:41,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:41,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:41,371 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 18:49:41,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106238377] [2021-02-23 18:49:41,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:41,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 18:49:41,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154156201] [2021-02-23 18:49:41,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 18:49:41,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 18:49:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-23 18:49:41,374 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 14 states. [2021-02-23 18:49:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:42,039 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-02-23 18:49:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 18:49:42,040 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2021-02-23 18:49:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:42,042 INFO L225 Difference]: With dead ends: 52 [2021-02-23 18:49:42,042 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 18:49:42,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-02-23 18:49:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 18:49:42,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-23 18:49:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-23 18:49:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-02-23 18:49:42,073 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 39 [2021-02-23 18:49:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:42,074 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-02-23 18:49:42,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 18:49:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-02-23 18:49:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 18:49:42,076 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:42,076 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:49:42,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:49:42,076 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1465403849, now seen corresponding path program 5 times [2021-02-23 18:49:42,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:42,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520074175] [2021-02-23 18:49:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:42,279 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:49:42,280 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:42,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:42,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:42,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:42,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:42,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:42,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:42,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:42,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:42,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:42,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:42,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:42,460 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:49:42,463 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:49:42,494 WARN L141 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size [2021-02-23 18:49:42,495 WARN L147 QuantifierPusher]: treesize reduction 9, result has 55.0 percent of original size 11 [2021-02-23 18:49:42,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:42,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:49:42,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:42,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:42,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:42,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:42,583 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 18:49:42,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520074175] [2021-02-23 18:49:42,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:42,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 18:49:42,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878000148] [2021-02-23 18:49:42,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 18:49:42,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:42,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 18:49:42,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-02-23 18:49:42,586 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 16 states. [2021-02-23 18:49:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:43,414 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-02-23 18:49:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 18:49:43,414 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2021-02-23 18:49:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:43,416 INFO L225 Difference]: With dead ends: 57 [2021-02-23 18:49:43,416 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 18:49:43,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-02-23 18:49:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 18:49:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-23 18:49:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 18:49:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-02-23 18:49:43,433 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 44 [2021-02-23 18:49:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:43,434 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-02-23 18:49:43,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 18:49:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-02-23 18:49:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-23 18:49:43,436 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:43,436 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:49:43,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:49:43,436 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1959769229, now seen corresponding path program 6 times [2021-02-23 18:49:43,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:43,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137974142] [2021-02-23 18:49:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:43,610 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:49:43,612 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:49:43,636 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:49:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:49:43,661 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:49:43,700 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:49:43,700 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:49:43,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:49:43,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:49:43 BoogieIcfgContainer [2021-02-23 18:49:43,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:49:43,724 INFO L168 Benchmark]: Toolchain (without parser) took 7093.86 ms. Allocated memory was 155.2 MB in the beginning and 242.2 MB in the end (delta: 87.0 MB). Free memory was 132.6 MB in the beginning and 115.1 MB in the end (delta: 17.5 MB). Peak memory consumption was 104.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:49:43,725 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 155.2 MB. Free memory is still 128.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:49:43,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.73 ms. Allocated memory is still 155.2 MB. Free memory was 131.4 MB in the beginning and 122.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:49:43,726 INFO L168 Benchmark]: Boogie Preprocessor took 35.86 ms. Allocated memory is still 155.2 MB. Free memory was 122.3 MB in the beginning and 120.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:49:43,726 INFO L168 Benchmark]: RCFGBuilder took 409.17 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 107.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-23 18:49:43,727 INFO L168 Benchmark]: TraceAbstraction took 6369.74 ms. Allocated memory was 155.2 MB in the beginning and 242.2 MB in the end (delta: 87.0 MB). Free memory was 107.1 MB in the beginning and 115.1 MB in the end (delta: -8.0 MB). Peak memory consumption was 79.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:49:43,730 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 155.2 MB. Free memory is still 128.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.73 ms. Allocated memory is still 155.2 MB. Free memory was 131.4 MB in the beginning and 122.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.86 ms. Allocated memory is still 155.2 MB. Free memory was 122.3 MB in the beginning and 120.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 409.17 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 107.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6369.74 ms. Allocated memory was 155.2 MB in the beginning and 242.2 MB in the end (delta: 87.0 MB). Free memory was 107.1 MB in the beginning and 115.1 MB in the end (delta: -8.0 MB). Peak memory consumption was 79.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(x != 6) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.1s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 205 SDslu, 513 SDs, 0 SdLazy, 952 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...