/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.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:24:01,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:24:01,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:24:01,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:24:01,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:24:01,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:24:01,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:24:01,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:24:01,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:24:01,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:24:01,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:24:01,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:24:01,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:24:01,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:24:01,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:24:01,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:24:01,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:24:01,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:24:01,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:24:01,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:24:01,745 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 02:24:01,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:24:01,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:24:01,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:24:01,779 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:24:01,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:24:01,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:24:01,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:24:01,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:24:01,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:24:01,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:24:01,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:24:01,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:24:01,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:24:01,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:24:01,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:24:01,783 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:24:01,783 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:24:01,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:24:01,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:24:01,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:24:01,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:24:01,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:24:01,785 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:24:01,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:24:02,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:24:02,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:24:02,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:24:02,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:24:02,287 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:24:02,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2021-02-22 02:24:02,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0979038d/5145c8798a5b40db88e0a92608014d3b/FLAGe3b4db299 [2021-02-22 02:24:03,138 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:24:03,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2021-02-22 02:24:03,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0979038d/5145c8798a5b40db88e0a92608014d3b/FLAGe3b4db299 [2021-02-22 02:24:03,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0979038d/5145c8798a5b40db88e0a92608014d3b [2021-02-22 02:24:03,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:24:03,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:24:03,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:03,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:24:03,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:24:03,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:03" (1/1) ... [2021-02-22 02:24:03,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ead702d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03, skipping insertion in model container [2021-02-22 02:24:03,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:24:03" (1/1) ... [2021-02-22 02:24:03,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:24:03,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:24:03,701 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.v+cfa-reducer.c[1224,1237] [2021-02-22 02:24:03,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:03,720 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:24:03,758 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.v+cfa-reducer.c[1224,1237] [2021-02-22 02:24:03,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:24:03,787 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:24:03,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03 WrapperNode [2021-02-22 02:24:03,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:24:03,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:24:03,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:24:03,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:24:03,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03" (1/1) ... [2021-02-22 02:24:03,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03" (1/1) ... [2021-02-22 02:24:03,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03" (1/1) ... [2021-02-22 02:24:03,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03" (1/1) ... [2021-02-22 02:24:03,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03" (1/1) ... [2021-02-22 02:24:03,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03" (1/1) ... [2021-02-22 02:24:03,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03" (1/1) ... [2021-02-22 02:24:03,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:24:03,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:24:03,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:24:03,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:24:03,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03" (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 02:24:04,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:24:04,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:24:04,005 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:24:04,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:24:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:24:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:24:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:24:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:24:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:24:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:24:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:24:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:24:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:24:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:24:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:24:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:24:04,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:24:04,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:24:04,561 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 02:24:04,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:24:04 BoogieIcfgContainer [2021-02-22 02:24:04,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:24:04,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:24:04,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:24:04,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:24:04,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:24:03" (1/3) ... [2021-02-22 02:24:04,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f14285e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:24:04, skipping insertion in model container [2021-02-22 02:24:04,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:24:03" (2/3) ... [2021-02-22 02:24:04,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f14285e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:24:04, skipping insertion in model container [2021-02-22 02:24:04,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:24:04" (3/3) ... [2021-02-22 02:24:04,574 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c.v+cfa-reducer.c [2021-02-22 02:24:04,583 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:24:04,589 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:24:04,612 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:24:04,641 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:24:04,641 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:24:04,641 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:24:04,641 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:24:04,642 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:24:04,642 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:24:04,642 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:24:04,642 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:24:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2021-02-22 02:24:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-22 02:24:04,674 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:04,675 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] [2021-02-22 02:24:04,675 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:04,682 INFO L82 PathProgramCache]: Analyzing trace with hash -882832926, now seen corresponding path program 1 times [2021-02-22 02:24:04,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:04,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272148911] [2021-02-22 02:24:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:04,784 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:24:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:04,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:04,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:04,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:04,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:24:04,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:04,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:05,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:24:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:24:05,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:24:05,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:24:05,105 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 02:24:05,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272148911] [2021-02-22 02:24:05,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:24:05,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:24:05,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251996576] [2021-02-22 02:24:05,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:24:05,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:24:05,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:24:05,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:24:05,141 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2021-02-22 02:24:05,383 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-22 02:24:05,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:24:05,630 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-02-22 02:24:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 02:24:05,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-22 02:24:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:24:05,645 INFO L225 Difference]: With dead ends: 91 [2021-02-22 02:24:05,645 INFO L226 Difference]: Without dead ends: 64 [2021-02-22 02:24:05,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:24:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-22 02:24:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2021-02-22 02:24:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-22 02:24:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-02-22 02:24:05,711 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 28 [2021-02-22 02:24:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:24:05,712 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-02-22 02:24:05,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:24:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-02-22 02:24:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:24:05,717 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:24:05,717 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-22 02:24:05,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:24:05,720 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:24:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:24:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1517749848, now seen corresponding path program 1 times [2021-02-22 02:24:05,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:24:05,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046019082] [2021-02-22 02:24:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:24:05,867 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-22 02:24:05,876 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 02:24:05,881 INFO L168 Benchmark]: Toolchain (without parser) took 2400.44 ms. Allocated memory is still 158.3 MB. Free memory was 135.2 MB in the beginning and 103.7 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:05,882 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:24:05,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.14 ms. Allocated memory is still 158.3 MB. Free memory was 134.1 MB in the beginning and 123.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:05,884 INFO L168 Benchmark]: Boogie Preprocessor took 72.80 ms. Allocated memory is still 158.3 MB. Free memory was 123.9 MB in the beginning and 122.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:05,885 INFO L168 Benchmark]: RCFGBuilder took 698.52 ms. Allocated memory is still 158.3 MB. Free memory was 122.4 MB in the beginning and 106.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:05,885 INFO L168 Benchmark]: TraceAbstraction took 1313.90 ms. Allocated memory is still 158.3 MB. Free memory was 105.6 MB in the beginning and 103.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:24:05,890 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 297.14 ms. Allocated memory is still 158.3 MB. Free memory was 134.1 MB in the beginning and 123.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.80 ms. Allocated memory is still 158.3 MB. Free memory was 123.9 MB in the beginning and 122.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 698.52 ms. Allocated memory is still 158.3 MB. Free memory was 122.4 MB in the beginning and 106.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1313.90 ms. Allocated memory is still 158.3 MB. Free memory was 105.6 MB in the beginning and 103.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...