/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-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:55:17,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:55:17,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:55:17,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:55:17,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:55:17,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:55:17,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:55:17,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:55:17,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:55:17,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:55:17,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:55:17,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:55:17,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:55:17,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:55:17,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:55:17,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:55:17,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:55:17,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:55:17,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:55:17,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:55:17,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:55:17,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:55:17,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:55:17,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:55:18,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:55:18,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:55:18,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:55:18,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:55:18,017 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 18:55:18,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:55:18,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:55:18,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:55:18,045 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:55:18,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:55:18,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:55:18,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:55:18,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:55:18,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:55:18,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:55:18,047 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:55:18,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:55:18,048 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:55:18,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:55:18,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:55:18,049 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:55:18,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:55:18,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:55:18,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:55:18,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:55:18,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:55:18,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:55:18,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:55:18,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:55:18,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:55:18,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:55:18,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:55:18,503 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:55:18,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2021-02-23 18:55:18,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1969c4b3a/fc52c7bd3f194a90bb426f7d137d76da/FLAGe735f89fe [2021-02-23 18:55:19,368 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:55:19,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2021-02-23 18:55:19,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1969c4b3a/fc52c7bd3f194a90bb426f7d137d76da/FLAGe735f89fe [2021-02-23 18:55:19,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1969c4b3a/fc52c7bd3f194a90bb426f7d137d76da [2021-02-23 18:55:19,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:55:19,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:55:19,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:55:19,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:55:19,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:55:19,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:55:19" (1/1) ... [2021-02-23 18:55:19,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7733fe3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19, skipping insertion in model container [2021-02-23 18:55:19,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:55:19" (1/1) ... [2021-02-23 18:55:19,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:55:19,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:55:19,920 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-invgen/id_build.i[893,906] [2021-02-23 18:55:19,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:55:19,944 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:55:19,959 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-invgen/id_build.i[893,906] [2021-02-23 18:55:19,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:55:19,981 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:55:19,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19 WrapperNode [2021-02-23 18:55:19,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:55:19,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:55:19,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:55:19,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:55:19,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19" (1/1) ... [2021-02-23 18:55:19,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19" (1/1) ... [2021-02-23 18:55:20,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19" (1/1) ... [2021-02-23 18:55:20,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19" (1/1) ... [2021-02-23 18:55:20,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19" (1/1) ... [2021-02-23 18:55:20,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19" (1/1) ... [2021-02-23 18:55:20,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19" (1/1) ... [2021-02-23 18:55:20,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:55:20,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:55:20,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:55:20,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:55:20,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19" (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 18:55:20,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:55:20,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:55:20,121 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:55:20,121 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 18:55:20,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:55:20,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:55:20,122 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:55:20,122 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:55:20,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:55:20,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:55:20,124 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:55:20,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:55:20,124 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 18:55:20,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:55:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:55:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:55:20,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:55:20,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:55:20,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:55:20,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:55:20,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:55:20,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:55:20,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:55:20,510 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-23 18:55:20,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:55:20 BoogieIcfgContainer [2021-02-23 18:55:20,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:55:20,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:55:20,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:55:20,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:55:20,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:55:19" (1/3) ... [2021-02-23 18:55:20,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a57120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:55:20, skipping insertion in model container [2021-02-23 18:55:20,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:55:19" (2/3) ... [2021-02-23 18:55:20,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a57120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:55:20, skipping insertion in model container [2021-02-23 18:55:20,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:55:20" (3/3) ... [2021-02-23 18:55:20,525 INFO L111 eAbstractionObserver]: Analyzing ICFG id_build.i [2021-02-23 18:55:20,537 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:55:20,544 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:55:20,569 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:55:20,602 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:55:20,602 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:55:20,603 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:55:20,603 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:55:20,606 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:55:20,606 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:55:20,607 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:55:20,607 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:55:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-23 18:55:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 18:55:20,675 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:55:20,677 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] [2021-02-23 18:55:20,679 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:55:20,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:55:20,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1177028000, now seen corresponding path program 1 times [2021-02-23 18:55:20,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:55:20,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925737198] [2021-02-23 18:55:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:55:20,807 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:55:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:21,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:21,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:21,097 WARN L141 QuantifierPusher]: treesize reduction 14, result has 17.6 percent of original size [2021-02-23 18:55:21,099 WARN L147 QuantifierPusher]: treesize reduction 14, result has 17.6 percent of original size 3 [2021-02-23 18:55:21,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:55:21,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:55:21,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:21,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:55:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:21,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:21,240 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 18:55:21,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925737198] [2021-02-23 18:55:21,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:55:21,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:55:21,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800432891] [2021-02-23 18:55:21,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:55:21,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:55:21,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:55:21,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:55:21,269 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2021-02-23 18:55:21,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:55:21,632 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-02-23 18:55:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:55:21,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-02-23 18:55:21,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:55:21,645 INFO L225 Difference]: With dead ends: 68 [2021-02-23 18:55:21,645 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 18:55:21,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:55:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 18:55:21,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-02-23 18:55:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-23 18:55:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-02-23 18:55:21,731 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 26 [2021-02-23 18:55:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:55:21,732 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-02-23 18:55:21,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:55:21,732 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-02-23 18:55:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 18:55:21,735 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:55:21,736 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 18:55:21,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:55:21,737 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:55:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:55:21,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1615816328, now seen corresponding path program 1 times [2021-02-23 18:55:21,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:55:21,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250243095] [2021-02-23 18:55:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:55:21,752 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:55:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:21,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:21,833 WARN L141 QuantifierPusher]: treesize reduction 5, result has 50.0 percent of original size [2021-02-23 18:55:21,833 WARN L147 QuantifierPusher]: treesize reduction 5, result has 50.0 percent of original size 5 [2021-02-23 18:55:21,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:55:21,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:55:21,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:21,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:55:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:21,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:21,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 18:55:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:21,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:21,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:21,899 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 18:55:21,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250243095] [2021-02-23 18:55:21,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:55:21,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:55:21,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973138033] [2021-02-23 18:55:21,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:55:21,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:55:21,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:55:21,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:55:21,905 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 6 states. [2021-02-23 18:55:22,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:55:22,119 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-02-23 18:55:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:55:22,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2021-02-23 18:55:22,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:55:22,122 INFO L225 Difference]: With dead ends: 56 [2021-02-23 18:55:22,123 INFO L226 Difference]: Without dead ends: 54 [2021-02-23 18:55:22,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:55:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-23 18:55:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-23 18:55:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-23 18:55:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-02-23 18:55:22,144 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2021-02-23 18:55:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:55:22,145 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-02-23 18:55:22,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:55:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-02-23 18:55:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 18:55:22,147 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:55:22,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:55:22,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:55:22,148 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:55:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:55:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1228655254, now seen corresponding path program 1 times [2021-02-23 18:55:22,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:55:22,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734857512] [2021-02-23 18:55:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:55:22,173 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:55:22,175 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:55:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:22,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:55:22,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:55:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:22,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 18:55:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:22,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,248 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 18:55:22,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734857512] [2021-02-23 18:55:22,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:55:22,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:55:22,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181971112] [2021-02-23 18:55:22,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:55:22,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:55:22,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:55:22,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:55:22,251 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 4 states. [2021-02-23 18:55:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:55:22,369 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-02-23 18:55:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:55:22,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2021-02-23 18:55:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:55:22,372 INFO L225 Difference]: With dead ends: 83 [2021-02-23 18:55:22,372 INFO L226 Difference]: Without dead ends: 62 [2021-02-23 18:55:22,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:55:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-23 18:55:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-02-23 18:55:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-23 18:55:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-02-23 18:55:22,393 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 37 [2021-02-23 18:55:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:55:22,393 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-02-23 18:55:22,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:55:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-02-23 18:55:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 18:55:22,395 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:55:22,396 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-02-23 18:55:22,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:55:22,396 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:55:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:55:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1732220169, now seen corresponding path program 1 times [2021-02-23 18:55:22,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:55:22,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652244636] [2021-02-23 18:55:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:55:22,411 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:55:22,412 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:55:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:22,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:55:22,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:55:22,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:55:22,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:55:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:22,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-23 18:55:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:22,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-23 18:55:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:22,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-02-23 18:55:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:55:22,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:55:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-23 18:55:22,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652244636] [2021-02-23 18:55:22,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:55:22,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:55:22,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234216988] [2021-02-23 18:55:22,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:55:22,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:55:22,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:55:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:55:22,585 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 6 states. [2021-02-23 18:55:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:55:22,835 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2021-02-23 18:55:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:55:22,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2021-02-23 18:55:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:55:22,838 INFO L225 Difference]: With dead ends: 96 [2021-02-23 18:55:22,838 INFO L226 Difference]: Without dead ends: 74 [2021-02-23 18:55:22,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:55:22,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-23 18:55:22,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-02-23 18:55:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-23 18:55:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-02-23 18:55:22,860 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 51 [2021-02-23 18:55:22,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:55:22,860 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-02-23 18:55:22,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:55:22,861 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-02-23 18:55:22,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-23 18:55:22,863 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:55:22,863 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 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] [2021-02-23 18:55:22,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:55:22,864 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:55:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:55:22,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1613738600, now seen corresponding path program 2 times [2021-02-23 18:55:22,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:55:22,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430522491] [2021-02-23 18:55:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:55:22,891 WARN L141 QuantifierPusher]: treesize reduction 2, result has 97.0 percent of original size [2021-02-23 18:55:22,924 INFO L424 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2021-02-23 18:55:22,925 INFO L723 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-02-23 18:55:22,929 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:55:22,933 WARN L147 QuantifierPusher]: treesize reduction 2, result has 97.0 percent of original size 65 [2021-02-23 18:55:22,985 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:473) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:426) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.paraoct.OctTerm.leftTerm(OctTerm.java:77) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.paraoct.OctTerm.toTerm(OctTerm.java:70) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.paraoct.OctConjunction.toTerm(OctConjunction.java:157) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRTermChecker.checkSequentialized(FastUPRTermChecker.java:117) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRTermChecker.checkConsistency(FastUPRTermChecker.java:107) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.periodLoop(FastUPRCore.java:166) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.prefixLoop(FastUPRCore.java:154) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.(FastUPRCore.java:145) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorFastUPR.accelerateLoop(AcceleratorFastUPR.java:73) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.accelerateNestedLoops(AcceleratedInterpolationCore.java:430) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:165) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-02-23 18:55:22,989 INFO L168 Benchmark]: Toolchain (without parser) took 3275.73 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 135.3 MB in the beginning and 107.0 MB in the end (delta: 28.4 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:55:22,990 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 159.4 MB. Free memory is still 134.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:55:22,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.84 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 124.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:55:22,991 INFO L168 Benchmark]: Boogie Preprocessor took 37.11 ms. Allocated memory is still 159.4 MB. Free memory was 124.6 MB in the beginning and 123.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:55:22,992 INFO L168 Benchmark]: RCFGBuilder took 492.43 ms. Allocated memory is still 159.4 MB. Free memory was 123.2 MB in the beginning and 139.1 MB in the end (delta: -15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:55:22,993 INFO L168 Benchmark]: TraceAbstraction took 2471.42 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 138.6 MB in the beginning and 107.0 MB in the end (delta: 31.6 MB). Peak memory consumption was 65.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:55:22,996 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 159.4 MB. Free memory is still 134.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.84 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 124.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.11 ms. Allocated memory is still 159.4 MB. Free memory was 124.6 MB in the beginning and 123.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 492.43 ms. Allocated memory is still 159.4 MB. Free memory was 123.2 MB in the beginning and 139.1 MB in the end (delta: -15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2471.42 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 138.6 MB in the beginning and 107.0 MB in the end (delta: 31.6 MB). Peak memory consumption was 65.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:473) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...