/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_cut_trace.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:07:09,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:07:09,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:07:09,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:07:09,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:07:09,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:07:09,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:07:09,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:07:09,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:07:09,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:07:09,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:07:09,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:07:09,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:07:09,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:07:09,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:07:09,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:07:09,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:07:09,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:07:09,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:07:09,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:07:09,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:07:09,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:07:09,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:07:09,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:07:09,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:07:09,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:07:09,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:07:09,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:07:09,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:07:09,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:07:09,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:07:09,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:07:09,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:07:09,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:07:09,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:07:09,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:07:09,660 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:07:09,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:07:09,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:07:09,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:07:09,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:07:09,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:07:09,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:07:09,662 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:07:10,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:07:10,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:07:10,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:07:10,274 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:07:10,275 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:07:10,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_cut_trace.i [2021-02-23 18:07:10,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3bf9e73c/83ffd0a3e8174c4182c811fccd1aa3c2/FLAGc008c97d6 [2021-02-23 18:07:11,056 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:07:11,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_cut_trace.i [2021-02-23 18:07:11,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3bf9e73c/83ffd0a3e8174c4182c811fccd1aa3c2/FLAGc008c97d6 [2021-02-23 18:07:11,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3bf9e73c/83ffd0a3e8174c4182c811fccd1aa3c2 [2021-02-23 18:07:11,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:07:11,453 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:07:11,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:07:11,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:07:11,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:07:11,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:07:11" (1/1) ... [2021-02-23 18:07:11,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a89933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11, skipping insertion in model container [2021-02-23 18:07:11,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:07:11" (1/1) ... [2021-02-23 18:07:11,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:07:11,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:07:11,692 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_cut_trace.i[296,309] [2021-02-23 18:07:11,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:07:11,728 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:07:11,747 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_cut_trace.i[296,309] [2021-02-23 18:07:11,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:07:11,772 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:07:11,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11 WrapperNode [2021-02-23 18:07:11,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:07:11,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:07:11,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:07:11,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:07:11,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11" (1/1) ... [2021-02-23 18:07:11,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11" (1/1) ... [2021-02-23 18:07:11,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11" (1/1) ... [2021-02-23 18:07:11,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11" (1/1) ... [2021-02-23 18:07:11,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11" (1/1) ... [2021-02-23 18:07:11,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11" (1/1) ... [2021-02-23 18:07:11,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11" (1/1) ... [2021-02-23 18:07:11,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:07:11,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:07:11,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:07:11,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:07:11,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:07:11,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:07:11,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:07:11,957 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:07:11,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-02-23 18:07:11,957 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:07:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:07:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:07:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:07:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:07:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-02-23 18:07:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:07:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:07:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:07:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:07:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:07:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:07:11,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:07:12,235 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:07:12,236 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 18:07:12,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:07:12 BoogieIcfgContainer [2021-02-23 18:07:12,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:07:12,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:07:12,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:07:12,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:07:12,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:07:11" (1/3) ... [2021-02-23 18:07:12,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c972b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:07:12, skipping insertion in model container [2021-02-23 18:07:12,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:11" (2/3) ... [2021-02-23 18:07:12,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c972b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:07:12, skipping insertion in model container [2021-02-23 18:07:12,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:07:12" (3/3) ... [2021-02-23 18:07:12,252 INFO L111 eAbstractionObserver]: Analyzing ICFG test_cut_trace.i [2021-02-23 18:07:12,264 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:07:12,274 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:07:12,323 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:07:12,355 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:07:12,355 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:07:12,355 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:07:12,355 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:07:12,356 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:07:12,356 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:07:12,356 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:07:12,356 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:07:12,385 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-02-23 18:07:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 18:07:12,403 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:07:12,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:07:12,405 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:07:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:07:12,424 INFO L82 PathProgramCache]: Analyzing trace with hash 512098345, now seen corresponding path program 1 times [2021-02-23 18:07:12,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:07:12,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874627033] [2021-02-23 18:07:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:07:12,577 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:07:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:12,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:12,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:12,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:12,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:07:12,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:12,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:12,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:07:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:12,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:12,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:07:12,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874627033] [2021-02-23 18:07:12,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:07:12,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:07:12,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842997274] [2021-02-23 18:07:12,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:07:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:07:12,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:07:12,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:07:12,944 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2021-02-23 18:07:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:07:13,087 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-02-23 18:07:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:07:13,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-23 18:07:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:07:13,100 INFO L225 Difference]: With dead ends: 40 [2021-02-23 18:07:13,100 INFO L226 Difference]: Without dead ends: 21 [2021-02-23 18:07:13,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:07:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-02-23 18:07:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-02-23 18:07:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-02-23 18:07:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2021-02-23 18:07:13,170 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 18 [2021-02-23 18:07:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:07:13,171 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2021-02-23 18:07:13,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:07:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2021-02-23 18:07:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 18:07:13,172 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:07:13,173 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] [2021-02-23 18:07:13,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:07:13,173 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:07:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:07:13,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1796971094, now seen corresponding path program 1 times [2021-02-23 18:07:13,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:07:13,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543219687] [2021-02-23 18:07:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:07:13,179 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:07:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:13,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:13,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:13,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:13,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:07:13,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:13,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:07:13,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:13,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:13,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:07:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:13,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:13,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:07:13,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543219687] [2021-02-23 18:07:13,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:07:13,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:07:13,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741533427] [2021-02-23 18:07:13,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:07:13,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:07:13,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:07:13,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:07:13,375 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand 5 states. [2021-02-23 18:07:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:07:13,501 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2021-02-23 18:07:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:07:13,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2021-02-23 18:07:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:07:13,503 INFO L225 Difference]: With dead ends: 21 [2021-02-23 18:07:13,503 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 18:07:13,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:07:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 18:07:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 18:07:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 18:07:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 18:07:13,506 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-02-23 18:07:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:07:13,507 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 18:07:13,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:07:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 18:07:13,507 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 18:07:13,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:07:13,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 18:07:13,889 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 18:07:13,889 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 18:07:13,890 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 18:07:13,890 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 18:07:13,890 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 18:07:13,890 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 18:07:13,891 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 18:07:13,891 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 18:07:13,891 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 18:07:13,891 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 18:07:13,892 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 18:07:13,892 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 18:07:13,892 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 18:07:13,892 INFO L192 CegarLoopUtils]: At program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: true [2021-02-23 18:07:13,893 INFO L192 CegarLoopUtils]: At program point __blast_assertEXIT(lines 6 9) the Hoare annotation is: true [2021-02-23 18:07:13,893 INFO L192 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: true [2021-02-23 18:07:13,893 INFO L192 CegarLoopUtils]: At program point __blast_assertFINAL(lines 6 9) the Hoare annotation is: true [2021-02-23 18:07:13,893 INFO L192 CegarLoopUtils]: At program point __blast_assertENTRY(lines 6 9) the Hoare annotation is: true [2021-02-23 18:07:13,893 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 18:07:13,893 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 18:07:13,894 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 18:07:13,894 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 18:07:13,894 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 15 22) the Hoare annotation is: true [2021-02-23 18:07:13,894 INFO L185 CegarLoopUtils]: At program point mainEXIT(lines 15 22) the Hoare annotation is: (= main_~z~0 0) [2021-02-23 18:07:13,894 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (and (= main_~z~0 0) (= main_~a~0 0)) [2021-02-23 18:07:13,895 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (= main_~z~0 0) [2021-02-23 18:07:13,895 INFO L185 CegarLoopUtils]: At program point L20-2(line 20) the Hoare annotation is: false [2021-02-23 18:07:13,895 INFO L192 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: true [2021-02-23 18:07:13,895 INFO L185 CegarLoopUtils]: At program point L20-3(line 20) the Hoare annotation is: (= main_~z~0 0) [2021-02-23 18:07:13,896 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-23 18:07:13,896 INFO L185 CegarLoopUtils]: At program point L18-2(line 18) the Hoare annotation is: false [2021-02-23 18:07:13,896 INFO L185 CegarLoopUtils]: At program point L18-3(line 18) the Hoare annotation is: (= main_~z~0 0) [2021-02-23 18:07:13,896 INFO L185 CegarLoopUtils]: At program point mainFINAL(lines 15 22) the Hoare annotation is: (= main_~z~0 0) [2021-02-23 18:07:13,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:07:13 BoogieIcfgContainer [2021-02-23 18:07:13,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:07:13,922 INFO L168 Benchmark]: Toolchain (without parser) took 2484.86 ms. Allocated memory is still 153.1 MB. Free memory was 129.1 MB in the beginning and 105.6 MB in the end (delta: 23.5 MB). Peak memory consumption was 59.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:13,923 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 153.1 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:07:13,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.70 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 119.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:13,925 INFO L168 Benchmark]: Boogie Preprocessor took 44.41 ms. Allocated memory is still 153.1 MB. Free memory was 119.0 MB in the beginning and 117.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:13,926 INFO L168 Benchmark]: RCFGBuilder took 419.86 ms. Allocated memory is still 153.1 MB. Free memory was 117.6 MB in the beginning and 105.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:13,927 INFO L168 Benchmark]: TraceAbstraction took 1678.39 ms. Allocated memory is still 153.1 MB. Free memory was 104.7 MB in the beginning and 105.6 MB in the end (delta: -841.5 kB). Peak memory consumption was 33.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:13,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 153.1 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 316.70 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 119.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.41 ms. Allocated memory is still 153.1 MB. Free memory was 119.0 MB in the beginning and 117.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 419.86 ms. Allocated memory is still 153.1 MB. Free memory was 117.6 MB in the beginning and 105.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1678.39 ms. Allocated memory is still 153.1 MB. Free memory was 104.7 MB in the beginning and 105.6 MB in the end (delta: -841.5 kB). Peak memory consumption was 33.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 6]: Procedure Contract for __blast_assert Derived contract for procedure __blast_assert: 1 - ProcedureContractResult [Line: 15]: Procedure Contract for main Derived contract for procedure main: z == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 22 SDslu, 46 SDs, 0 SdLazy, 28 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 30 LocationsWithAnnotation, 40 PreInvPairs, 47 NumberOfFragments, 76 HoareAnnotationTreeSize, 40 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 30 FomulaSimplificationsInter, 275 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...