/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:48:42,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:48:42,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:48:42,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:48:42,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:48:42,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:48:42,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:48:42,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:48:42,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:48:42,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:48:42,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:48:42,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:48:42,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:48:42,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:48:42,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:48:42,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:48:42,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:48:42,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:48:42,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:48:42,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:48:42,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:48:42,148 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:48:42,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:48:42,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:48:42,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:48:42,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:48:42,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:48:42,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:48:42,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:48:42,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:48:42,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:48:42,152 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:48:42,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:48:42,152 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:48:42,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:48:42,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:48:42,153 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:48:42,153 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:48:42,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:48:42,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:48:42,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:48:42,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:48:42,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:48:42,154 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:48:42,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:48:42,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:48:42,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:48:42,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:48:42,570 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:48:42,571 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:48:42,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2021-02-24 04:48:42,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eca79282/d091de836ca64c93b203adbf2874dc49/FLAG1cd8b2766 [2021-02-24 04:48:43,292 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:48:43,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2021-02-24 04:48:43,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eca79282/d091de836ca64c93b203adbf2874dc49/FLAG1cd8b2766 [2021-02-24 04:48:43,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eca79282/d091de836ca64c93b203adbf2874dc49 [2021-02-24 04:48:43,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:48:43,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:48:43,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:43,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:48:43,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:48:43,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:43" (1/1) ... [2021-02-24 04:48:43,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d0fd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43, skipping insertion in model container [2021-02-24 04:48:43,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:43" (1/1) ... [2021-02-24 04:48:43,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:48:43,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:48:43,836 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] [2021-02-24 04:48:43,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:43,862 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:48:43,878 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] [2021-02-24 04:48:43,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:43,899 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:48:43,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43 WrapperNode [2021-02-24 04:48:43,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:43,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:48:43,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:48:43,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:48:43,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43" (1/1) ... [2021-02-24 04:48:43,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43" (1/1) ... [2021-02-24 04:48:43,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43" (1/1) ... [2021-02-24 04:48:43,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43" (1/1) ... [2021-02-24 04:48:43,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43" (1/1) ... [2021-02-24 04:48:43,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43" (1/1) ... [2021-02-24 04:48:43,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43" (1/1) ... [2021-02-24 04:48:43,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:48:43,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:48:43,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:48:43,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:48:43,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43" (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 [2021-02-24 04:48:44,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:48:44,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:48:44,055 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:48:44,056 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:48:44,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:48:44,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:48:44,056 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:48:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:48:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:48:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:48:44,057 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:48:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:48:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:48:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:48:44,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:48:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:48:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:48:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:48:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:48:44,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:48:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:48:44,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:48:44,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:48:44,454 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-24 04:48:44,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:44 BoogieIcfgContainer [2021-02-24 04:48:44,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:48:44,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:48:44,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:48:44,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:48:44,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:48:43" (1/3) ... [2021-02-24 04:48:44,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51936c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:44, skipping insertion in model container [2021-02-24 04:48:44,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:43" (2/3) ... [2021-02-24 04:48:44,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51936c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:44, skipping insertion in model container [2021-02-24 04:48:44,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:44" (3/3) ... [2021-02-24 04:48:44,505 INFO L111 eAbstractionObserver]: Analyzing ICFG id_build.i [2021-02-24 04:48:44,521 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:48:44,526 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:48:44,563 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:48:44,591 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:48:44,591 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:48:44,592 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:48:44,592 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:48:44,592 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:48:44,592 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:48:44,592 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:48:44,593 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:48:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-24 04:48:44,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-24 04:48:44,619 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:44,620 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] [2021-02-24 04:48:44,620 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:44,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1177028000, now seen corresponding path program 1 times [2021-02-24 04:48:44,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:44,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730330617] [2021-02-24 04:48:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:44,717 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:44,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:44,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:44,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:44,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:44,889 WARN L141 QuantifierPusher]: treesize reduction 14, result has 17.6 percent of original size [2021-02-24 04:48:44,890 WARN L147 QuantifierPusher]: treesize reduction 14, result has 17.6 percent of original size 3 [2021-02-24 04:48:44,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:44,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:44,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:44,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:44,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:44,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:45,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:45,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:45,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:48:45,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730330617] [2021-02-24 04:48:45,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:45,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:48:45,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585506928] [2021-02-24 04:48:45,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:48:45,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:45,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:48:45,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:48:45,074 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2021-02-24 04:48:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:45,583 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-02-24 04:48:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:48:45,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-02-24 04:48:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:45,595 INFO L225 Difference]: With dead ends: 68 [2021-02-24 04:48:45,595 INFO L226 Difference]: Without dead ends: 40 [2021-02-24 04:48:45,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:48:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-24 04:48:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-02-24 04:48:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-24 04:48:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-02-24 04:48:45,671 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 26 [2021-02-24 04:48:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:45,671 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-02-24 04:48:45,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:48:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-02-24 04:48:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 04:48:45,673 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:45,673 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] [2021-02-24 04:48:45,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:48:45,674 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1615816328, now seen corresponding path program 1 times [2021-02-24 04:48:45,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:45,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429125140] [2021-02-24 04:48:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:45,679 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:45,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:45,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:45,738 WARN L141 QuantifierPusher]: treesize reduction 5, result has 50.0 percent of original size [2021-02-24 04:48:45,740 WARN L147 QuantifierPusher]: treesize reduction 5, result has 50.0 percent of original size 5 [2021-02-24 04:48:45,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:45,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:45,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:45,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:45,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:45,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:45,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:45,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:45,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:45,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-24 04:48:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:45,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:45,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:48:45,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429125140] [2021-02-24 04:48:45,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:45,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:48:45,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287985045] [2021-02-24 04:48:45,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:48:45,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:45,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:48:45,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:48:45,821 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 6 states. [2021-02-24 04:48:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:46,052 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-02-24 04:48:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:48:46,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2021-02-24 04:48:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:46,056 INFO L225 Difference]: With dead ends: 56 [2021-02-24 04:48:46,056 INFO L226 Difference]: Without dead ends: 54 [2021-02-24 04:48:46,058 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 [2021-02-24 04:48:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-24 04:48:46,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-24 04:48:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-24 04:48:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-02-24 04:48:46,079 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2021-02-24 04:48:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:46,080 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-02-24 04:48:46,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:48:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-02-24 04:48:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-24 04:48:46,082 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:46,083 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] [2021-02-24 04:48:46,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:48:46,083 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1228655254, now seen corresponding path program 1 times [2021-02-24 04:48:46,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:46,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074166411] [2021-02-24 04:48:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:46,102 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.lib.acceleratedinterpolation.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:183) 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) [2021-02-24 04:48:46,106 INFO L168 Benchmark]: Toolchain (without parser) took 2462.73 ms. Allocated memory was 166.7 MB in the beginning and 208.7 MB in the end (delta: 41.9 MB). Free memory was 143.1 MB in the beginning and 134.8 MB in the end (delta: 8.3 MB). Peak memory consumption was 51.2 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:46,107 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 166.7 MB. Free memory is still 140.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:48:46,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.92 ms. Allocated memory is still 166.7 MB. Free memory was 141.8 MB in the beginning and 132.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:46,108 INFO L168 Benchmark]: Boogie Preprocessor took 39.10 ms. Allocated memory is still 166.7 MB. Free memory was 132.3 MB in the beginning and 130.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:46,109 INFO L168 Benchmark]: RCFGBuilder took 514.62 ms. Allocated memory is still 166.7 MB. Free memory was 130.8 MB in the beginning and 115.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:46,111 INFO L168 Benchmark]: TraceAbstraction took 1647.01 ms. Allocated memory was 166.7 MB in the beginning and 208.7 MB in the end (delta: 41.9 MB). Free memory was 114.6 MB in the beginning and 134.8 MB in the end (delta: -20.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:46,115 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 166.7 MB. Free memory is still 140.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.92 ms. Allocated memory is still 166.7 MB. Free memory was 141.8 MB in the beginning and 132.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.10 ms. Allocated memory is still 166.7 MB. Free memory was 132.3 MB in the beginning and 130.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 514.62 ms. Allocated memory is still 166.7 MB. Free memory was 130.8 MB in the beginning and 115.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1647.01 ms. Allocated memory was 166.7 MB in the beginning and 208.7 MB in the end (delta: 41.9 MB). Free memory was 114.6 MB in the beginning and 134.8 MB in the end (delta: -20.2 MB). Peak memory consumption was 22.9 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.lib.acceleratedinterpolation.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...