/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-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:24:08,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:24:08,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:24:08,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:24:08,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:24:08,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:24:08,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:24:08,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:24:08,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:24:08,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:24:08,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:24:08,972 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:24:08,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:24:08,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:24:08,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:24:08,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:24:08,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:24:08,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:24:08,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:24:08,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:24:08,974 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:24:08,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:24:08,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:24:08,975 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:24:08,975 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:24:08,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:24:08,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:24:08,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:24:08,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:24:08,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:24:08,976 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:24:08,977 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:24:09,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:24:09,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:24:09,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:24:09,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:24:09,446 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:24:09,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c [2021-02-22 02:24:09,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f55132158/96fde5b4a17e46b98dff7a33a49ccd57/FLAGaf5005943 [2021-02-22 02:24:10,161 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:24:10,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c [2021-02-22 02:24:10,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f55132158/96fde5b4a17e46b98dff7a33a49ccd57/FLAGaf5005943 [2021-02-22 02:24:10,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f55132158/96fde5b4a17e46b98dff7a33a49ccd57 [2021-02-22 02:24:10,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:24:10,574 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:24:10,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:10,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:24:10,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:24:10,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:10" (1/1) ... [2021-02-22 02:24:10,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb70560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10, skipping insertion in model container [2021-02-22 02:24:10,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:10" (1/1) ... [2021-02-22 02:24:10,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:24:10,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:24:10,878 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-industry-pattern/mod3.c[394,407] [2021-02-22 02:24:10,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:10,915 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:24:10,934 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-industry-pattern/mod3.c[394,407] [2021-02-22 02:24:10,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:10,975 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:24:10,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10 WrapperNode [2021-02-22 02:24:10,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:10,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:24:10,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:24:10,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:24:10,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10" (1/1) ... [2021-02-22 02:24:10,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10" (1/1) ... [2021-02-22 02:24:11,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10" (1/1) ... [2021-02-22 02:24:11,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10" (1/1) ... [2021-02-22 02:24:11,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10" (1/1) ... [2021-02-22 02:24:11,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10" (1/1) ... [2021-02-22 02:24:11,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10" (1/1) ... [2021-02-22 02:24:11,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:24:11,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:24:11,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:24:11,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:24:11,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10" (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 [2021-02-22 02:24:11,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:24:11,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:24:11,145 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:24:11,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:24:11,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:24:11,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:24:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:24:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:24:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:24:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:24:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:24:11,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:24:11,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:24:11,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:24:11,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:24:11,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:24:11,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:24:11,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:24:11,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:24:11,631 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:24:11,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:24:11 BoogieIcfgContainer [2021-02-22 02:24:11,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:24:11,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:24:11,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:24:11,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:24:11,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:24:10" (1/3) ... [2021-02-22 02:24:11,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f77cc82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:24:11, skipping insertion in model container [2021-02-22 02:24:11,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:10" (2/3) ... [2021-02-22 02:24:11,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f77cc82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:24:11, skipping insertion in model container [2021-02-22 02:24:11,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:24:11" (3/3) ... [2021-02-22 02:24:11,647 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c [2021-02-22 02:24:11,657 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:24:11,663 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:24:11,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:24:11,725 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:24:11,725 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:24:11,725 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:24:11,726 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:24:11,726 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:24:11,726 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:24:11,726 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:24:11,726 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:24:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-22 02:24:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-22 02:24:11,763 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:11,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:24:11,765 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:11,774 INFO L82 PathProgramCache]: Analyzing trace with hash -600807621, now seen corresponding path program 1 times [2021-02-22 02:24:11,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:11,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385447559] [2021-02-22 02:24:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:11,870 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:24:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:11,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:12,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:12,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:12,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:12,131 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-22 02:24:12,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:24:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:12,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:12,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:24:12,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385447559] [2021-02-22 02:24:12,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:24:12,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:24:12,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168960896] [2021-02-22 02:24:12,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:24:12,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:24:12,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:24:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:24:12,243 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2021-02-22 02:24:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:24:12,371 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-02-22 02:24:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:24:12,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2021-02-22 02:24:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:24:12,383 INFO L225 Difference]: With dead ends: 66 [2021-02-22 02:24:12,384 INFO L226 Difference]: Without dead ends: 45 [2021-02-22 02:24:12,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:24:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-22 02:24:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-02-22 02:24:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-22 02:24:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-02-22 02:24:12,448 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 27 [2021-02-22 02:24:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:24:12,449 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-02-22 02:24:12,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:24:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-02-22 02:24:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-22 02:24:12,451 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:12,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:24:12,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:24:12,452 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash -787369506, now seen corresponding path program 1 times [2021-02-22 02:24:12,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:12,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039308977] [2021-02-22 02:24:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:12,456 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:24:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:12,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:12,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:12,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:12,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:24:12,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:12,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:12,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:24:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:12,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:12,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:24:12,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039308977] [2021-02-22 02:24:12,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:24:12,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:24:12,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357864011] [2021-02-22 02:24:12,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:24:12,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:24:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:24:12,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:24:12,671 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2021-02-22 02:24:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:24:13,001 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-02-22 02:24:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 02:24:13,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-22 02:24:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:24:13,005 INFO L225 Difference]: With dead ends: 69 [2021-02-22 02:24:13,005 INFO L226 Difference]: Without dead ends: 62 [2021-02-22 02:24:13,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:24:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-22 02:24:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2021-02-22 02:24:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-22 02:24:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-02-22 02:24:13,035 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 29 [2021-02-22 02:24:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:24:13,036 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-02-22 02:24:13,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:24:13,036 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-02-22 02:24:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:24:13,039 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:13,040 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, 1, 1, 1, 1] [2021-02-22 02:24:13,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:24:13,042 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1401376936, now seen corresponding path program 1 times [2021-02-22 02:24:13,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:13,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243541955] [2021-02-22 02:24:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:13,922 WARN L202 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 45 [2021-02-22 02:24:13,933 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) [2021-02-22 02:24:13,940 INFO L168 Benchmark]: Toolchain (without parser) took 3378.19 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.2 MB in the beginning and 155.9 MB in the end (delta: -28.7 MB). Peak memory consumption was 74.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:13,941 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:24:13,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:13,943 INFO L168 Benchmark]: Boogie Preprocessor took 47.26 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:13,944 INFO L168 Benchmark]: RCFGBuilder took 607.57 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 129.7 MB in the end (delta: -14.7 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:13,945 INFO L168 Benchmark]: TraceAbstraction took 2299.74 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 129.2 MB in the beginning and 156.5 MB in the end (delta: -27.3 MB). Peak memory consumption was 75.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:13,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 124.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 394.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.26 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 607.57 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 129.7 MB in the end (delta: -14.7 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2299.74 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 129.2 MB in the beginning and 156.5 MB in the end (delta: -27.3 MB). Peak memory consumption was 75.5 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...