/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-b7b32d2 [2021-02-21 21:23:55,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:23:55,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:23:55,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:23:55,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:23:55,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:23:55,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:23:55,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:23:55,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:23:55,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:23:55,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:23:55,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:23:55,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:23:55,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:23:55,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:23:55,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:23:55,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:23:55,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:23:55,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:23:55,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:23:55,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:23:55,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:23:55,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:23:55,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:23:55,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:23:55,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:23:55,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:23:55,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:23:55,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:23:55,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:23:55,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:23:55,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:23:55,809 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:23:55,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:23:55,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:23:55,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:23:55,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:23:55,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:23:55,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:23:55,811 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:23:55,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:23:55,812 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:23:55,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:23:55,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:23:55,813 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:23:55,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:23:55,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:23:55,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:23:55,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:23:55,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:23:55,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:23:55,815 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:23:56,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:23:56,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:23:56,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:23:56,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:23:56,336 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:23:56,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2021-02-21 21:23:56,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f4fa016/f99ad1fc4cbf4830b1694da0de5461fb/FLAGad8571001 [2021-02-21 21:23:57,278 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:23:57,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2021-02-21 21:23:57,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f4fa016/f99ad1fc4cbf4830b1694da0de5461fb/FLAGad8571001 [2021-02-21 21:23:57,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f4fa016/f99ad1fc4cbf4830b1694da0de5461fb [2021-02-21 21:23:57,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:23:57,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:23:57,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:23:57,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:23:57,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:23:57,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:23:57" (1/1) ... [2021-02-21 21:23:57,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47710b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:57, skipping insertion in model container [2021-02-21 21:23:57,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:23:57" (1/1) ... [2021-02-21 21:23:57,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:23:57,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:23:57,950 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] [2021-02-21 21:23:57,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:23:57,987 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:23:58,007 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] [2021-02-21 21:23:58,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:23:58,034 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:23:58,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58 WrapperNode [2021-02-21 21:23:58,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:23:58,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:23:58,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:23:58,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:23:58,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58" (1/1) ... [2021-02-21 21:23:58,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58" (1/1) ... [2021-02-21 21:23:58,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58" (1/1) ... [2021-02-21 21:23:58,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58" (1/1) ... [2021-02-21 21:23:58,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58" (1/1) ... [2021-02-21 21:23:58,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58" (1/1) ... [2021-02-21 21:23:58,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58" (1/1) ... [2021-02-21 21:23:58,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:23:58,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:23:58,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:23:58,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:23:58,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:23:58,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:23:58,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:23:58,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:23:58,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:23:58,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:23:58,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:23:58,228 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:23:58,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:23:58,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:23:58,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:23:58,230 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:23:58,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:23:58,231 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:23:58,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:23:58,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:23:58,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:23:58,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:23:58,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:23:58,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:23:58,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:23:58,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:23:58,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:23:58,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:23:58,825 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-21 21:23:58,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:23:58 BoogieIcfgContainer [2021-02-21 21:23:58,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:23:58,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:23:58,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:23:58,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:23:58,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:23:57" (1/3) ... [2021-02-21 21:23:58,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4b4089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:23:58, skipping insertion in model container [2021-02-21 21:23:58,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:23:58" (2/3) ... [2021-02-21 21:23:58,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4b4089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:23:58, skipping insertion in model container [2021-02-21 21:23:58,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:23:58" (3/3) ... [2021-02-21 21:23:58,844 INFO L111 eAbstractionObserver]: Analyzing ICFG id_build.i [2021-02-21 21:23:58,854 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:23:58,861 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:23:58,890 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:23:58,937 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:23:58,938 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:23:58,938 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:23:58,938 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:23:58,938 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:23:58,938 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:23:58,939 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:23:58,939 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:23:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-21 21:23:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 21:23:58,992 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:23:58,994 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] [2021-02-21 21:23:58,995 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:23:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:23:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1177028000, now seen corresponding path program 1 times [2021-02-21 21:23:59,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:23:59,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923180200] [2021-02-21 21:23:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:23:59,150 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:23:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:23:59,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:23:59,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:23:59,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:23:59,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:23:59,498 WARN L141 QuantifierPusher]: treesize reduction 14, result has 17.6 percent of original size [2021-02-21 21:23:59,501 WARN L147 QuantifierPusher]: treesize reduction 14, result has 17.6 percent of original size 3 [2021-02-21 21:23:59,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:23:59,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:23:59,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:23:59,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:23:59,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:23:59,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:23:59,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:23:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:23:59,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:23:59,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:23:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:23:59,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923180200] [2021-02-21 21:23:59,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:23:59,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:23:59,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666986381] [2021-02-21 21:23:59,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:23:59,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:23:59,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:23:59,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:23:59,725 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2021-02-21 21:24:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:24:00,217 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-02-21 21:24:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:24:00,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-02-21 21:24:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:24:00,238 INFO L225 Difference]: With dead ends: 68 [2021-02-21 21:24:00,239 INFO L226 Difference]: Without dead ends: 40 [2021-02-21 21:24:00,244 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 [2021-02-21 21:24:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-21 21:24:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-02-21 21:24:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-21 21:24:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-02-21 21:24:00,332 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 26 [2021-02-21 21:24:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:24:00,334 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-02-21 21:24:00,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:24:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-02-21 21:24:00,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:24:00,337 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:24:00,337 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] [2021-02-21 21:24:00,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:24:00,338 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:24:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:24:00,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1615816328, now seen corresponding path program 1 times [2021-02-21 21:24:00,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:24:00,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490940798] [2021-02-21 21:24:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:24:00,346 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:24:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:00,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:00,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:00,424 WARN L141 QuantifierPusher]: treesize reduction 5, result has 50.0 percent of original size [2021-02-21 21:24:00,428 WARN L147 QuantifierPusher]: treesize reduction 5, result has 50.0 percent of original size 5 [2021-02-21 21:24:00,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:00,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:24:00,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:00,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:24:00,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:00,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:00,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:24:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:00,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:00,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:00,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-21 21:24:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:00,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:00,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:24:00,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490940798] [2021-02-21 21:24:00,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:24:00,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:24:00,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683826460] [2021-02-21 21:24:00,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:24:00,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:24:00,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:24:00,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:24:00,582 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 6 states. [2021-02-21 21:24:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:24:01,031 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-02-21 21:24:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:24:01,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2021-02-21 21:24:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:24:01,035 INFO L225 Difference]: With dead ends: 56 [2021-02-21 21:24:01,036 INFO L226 Difference]: Without dead ends: 54 [2021-02-21 21:24:01,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:24:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-21 21:24:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-21 21:24:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-21 21:24:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-02-21 21:24:01,066 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2021-02-21 21:24:01,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:24:01,067 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-02-21 21:24:01,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:24:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-02-21 21:24:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-21 21:24:01,070 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:24:01,071 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] [2021-02-21 21:24:01,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:24:01,071 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:24:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:24:01,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1228655254, now seen corresponding path program 1 times [2021-02-21 21:24:01,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:24:01,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956137287] [2021-02-21 21:24:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:24:01,106 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:24:01,109 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:24:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:01,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:24:01,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:24:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:01,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-21 21:24:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:01,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:24:01,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956137287] [2021-02-21 21:24:01,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:24:01,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:24:01,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318217517] [2021-02-21 21:24:01,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:24:01,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:24:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:24:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:24:01,235 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 4 states. [2021-02-21 21:24:01,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:24:01,456 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-02-21 21:24:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:24:01,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2021-02-21 21:24:01,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:24:01,459 INFO L225 Difference]: With dead ends: 83 [2021-02-21 21:24:01,460 INFO L226 Difference]: Without dead ends: 62 [2021-02-21 21:24:01,461 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 [2021-02-21 21:24:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-21 21:24:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-02-21 21:24:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-21 21:24:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-02-21 21:24:01,484 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 37 [2021-02-21 21:24:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:24:01,485 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-02-21 21:24:01,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:24:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-02-21 21:24:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-21 21:24:01,487 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:24:01,487 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] [2021-02-21 21:24:01,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:24:01,488 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:24:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:24:01,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1732220169, now seen corresponding path program 1 times [2021-02-21 21:24:01,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:24:01,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953626522] [2021-02-21 21:24:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:24:01,507 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:24:01,509 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:24:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:01,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:24:01,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:24:01,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:24:01,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:24:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:01,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-21 21:24:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:01,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-21 21:24:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:01,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-02-21 21:24:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:24:01,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:01,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:24:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-21 21:24:01,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953626522] [2021-02-21 21:24:01,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:24:01,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:24:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554985500] [2021-02-21 21:24:01,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:24:01,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:24:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:24:01,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:24:01,764 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 6 states. [2021-02-21 21:24:02,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:24:02,045 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2021-02-21 21:24:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:24:02,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2021-02-21 21:24:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:24:02,048 INFO L225 Difference]: With dead ends: 96 [2021-02-21 21:24:02,048 INFO L226 Difference]: Without dead ends: 74 [2021-02-21 21:24:02,049 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 [2021-02-21 21:24:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-21 21:24:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-02-21 21:24:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-21 21:24:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-02-21 21:24:02,074 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 51 [2021-02-21 21:24:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:24:02,074 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-02-21 21:24:02,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:24:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-02-21 21:24:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-21 21:24:02,077 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:24:02,077 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] [2021-02-21 21:24:02,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:24:02,078 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:24:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:24:02,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1613738600, now seen corresponding path program 2 times [2021-02-21 21:24:02,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:24:02,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981113859] [2021-02-21 21:24:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:24:02,115 WARN L141 QuantifierPusher]: treesize reduction 2, result has 97.0 percent of original size [2021-02-21 21:24:02,158 INFO L424 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2021-02-21 21:24:02,158 INFO L723 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-02-21 21:24:02,164 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:24:02,168 WARN L147 QuantifierPusher]: treesize reduction 2, result has 97.0 percent of original size 65 [2021-02-21 21:24:02,238 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:81) 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) [2021-02-21 21:24:02,245 INFO L168 Benchmark]: Toolchain (without parser) took 4585.24 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 128.5 MB in the beginning and 79.7 MB in the end (delta: 48.8 MB). Peak memory consumption was 79.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:24:02,245 INFO L168 Benchmark]: CDTParser took 1.65 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:24:02,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.52 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:24:02,247 INFO L168 Benchmark]: Boogie Preprocessor took 52.00 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:24:02,248 INFO L168 Benchmark]: RCFGBuilder took 738.21 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 131.8 MB in the end (delta: -15.8 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:24:02,249 INFO L168 Benchmark]: TraceAbstraction took 3410.59 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.2 MB in the beginning and 79.7 MB in the end (delta: 51.5 MB). Peak memory consumption was 82.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:24:02,253 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.65 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 353.52 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.00 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 116.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 738.21 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 131.8 MB in the end (delta: -15.8 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3410.59 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.2 MB in the beginning and 79.7 MB in the end (delta: 51.5 MB). Peak memory consumption was 82.0 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...