/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:31:09,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:31:09,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:31:09,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:31:09,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:31:09,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:31:09,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:31:09,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:31:09,996 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:31:09,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:31:09,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:31:09,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:31:09,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:31:09,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:31:09,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:31:09,999 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:31:09,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:31:09,999 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:31:10,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:31:10,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:31:10,000 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:31:10,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:31:10,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:31:10,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:31:10,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:31:10,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:31:10,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:31:10,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:31:10,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:31:10,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:31:10,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:31:10,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:31:10,429 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:31:10,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2021-02-24 00:31:10,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7efde63a9/8219790125eb43a5bb1990332de69760/FLAG9fb3db505 [2021-02-24 00:31:11,215 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:31:11,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c [2021-02-24 00:31:11,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7efde63a9/8219790125eb43a5bb1990332de69760/FLAG9fb3db505 [2021-02-24 00:31:11,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7efde63a9/8219790125eb43a5bb1990332de69760 [2021-02-24 00:31:11,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:31:11,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:31:11,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:31:11,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:31:11,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:31:11,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:31:11" (1/1) ... [2021-02-24 00:31:11,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164edd18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11, skipping insertion in model container [2021-02-24 00:31:11,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:31:11" (1/1) ... [2021-02-24 00:31:11,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:31:11,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:31:11,572 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-invariants/eq1.c[364,377] [2021-02-24 00:31:11,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:31:11,607 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:31:11,624 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-invariants/eq1.c[364,377] [2021-02-24 00:31:11,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:31:11,646 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:31:11,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11 WrapperNode [2021-02-24 00:31:11,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:31:11,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:31:11,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:31:11,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:31:11,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11" (1/1) ... [2021-02-24 00:31:11,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11" (1/1) ... [2021-02-24 00:31:11,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11" (1/1) ... [2021-02-24 00:31:11,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11" (1/1) ... [2021-02-24 00:31:11,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11" (1/1) ... [2021-02-24 00:31:11,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11" (1/1) ... [2021-02-24 00:31:11,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11" (1/1) ... [2021-02-24 00:31:11,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:31:11,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:31:11,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:31:11,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:31:11,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11" (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 [2021-02-24 00:31:11,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:31:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:31:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:31:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:31:11,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:31:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:31:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:31:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:31:11,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:31:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 00:31:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:31:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:31:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:31:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:31:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:31:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:31:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:31:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:31:12,272 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:31:12,273 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:31:12,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:31:12 BoogieIcfgContainer [2021-02-24 00:31:12,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:31:12,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:31:12,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:31:12,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:31:12,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:31:11" (1/3) ... [2021-02-24 00:31:12,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec24146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:31:12, skipping insertion in model container [2021-02-24 00:31:12,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:31:11" (2/3) ... [2021-02-24 00:31:12,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec24146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:31:12, skipping insertion in model container [2021-02-24 00:31:12,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:31:12" (3/3) ... [2021-02-24 00:31:12,296 INFO L111 eAbstractionObserver]: Analyzing ICFG eq1.c [2021-02-24 00:31:12,310 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:31:12,315 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:31:12,335 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:31:12,359 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:31:12,360 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:31:12,360 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:31:12,360 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:31:12,360 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:31:12,360 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:31:12,361 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:31:12,361 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:31:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2021-02-24 00:31:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-24 00:31:12,389 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:12,390 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] [2021-02-24 00:31:12,391 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:12,397 INFO L82 PathProgramCache]: Analyzing trace with hash -713805134, now seen corresponding path program 1 times [2021-02-24 00:31:12,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:12,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477645056] [2021-02-24 00:31:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:12,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:12,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:12,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:12,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:12,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:12,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:12,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:31:12,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477645056] [2021-02-24 00:31:12,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:31:12,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:31:12,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431028347] [2021-02-24 00:31:12,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:31:12,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:31:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:31:12,808 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 3 states. [2021-02-24 00:31:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:12,930 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-02-24 00:31:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:31:12,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2021-02-24 00:31:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:12,941 INFO L225 Difference]: With dead ends: 67 [2021-02-24 00:31:12,941 INFO L226 Difference]: Without dead ends: 47 [2021-02-24 00:31:12,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:31:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-24 00:31:13,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-02-24 00:31:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-24 00:31:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-02-24 00:31:13,009 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 29 [2021-02-24 00:31:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:13,010 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-02-24 00:31:13,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:31:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-02-24 00:31:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-24 00:31:13,012 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:13,012 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, 1] [2021-02-24 00:31:13,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:31:13,013 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:13,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1452537245, now seen corresponding path program 1 times [2021-02-24 00:31:13,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:13,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898293554] [2021-02-24 00:31:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:13,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:13,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:13,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:13,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:13,285 WARN L141 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size [2021-02-24 00:31:13,287 WARN L147 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size 7 [2021-02-24 00:31:13,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:13,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:13,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:13,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:13,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:13,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:13,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:13,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:13,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:31:13,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898293554] [2021-02-24 00:31:13,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:31:13,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 00:31:13,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610252489] [2021-02-24 00:31:13,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:31:13,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:31:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:31:13,445 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 7 states. [2021-02-24 00:31:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:13,868 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2021-02-24 00:31:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:31:13,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2021-02-24 00:31:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:13,879 INFO L225 Difference]: With dead ends: 77 [2021-02-24 00:31:13,880 INFO L226 Difference]: Without dead ends: 71 [2021-02-24 00:31:13,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:31:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-24 00:31:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-02-24 00:31:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-24 00:31:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-02-24 00:31:13,927 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 30 [2021-02-24 00:31:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:13,928 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-02-24 00:31:13,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:31:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-02-24 00:31:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-24 00:31:13,931 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:13,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:13,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:31:13,936 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash 253640520, now seen corresponding path program 1 times [2021-02-24 00:31:13,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:13,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610920916] [2021-02-24 00:31:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:14,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:14,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:14,057 WARN L141 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size [2021-02-24 00:31:14,058 WARN L147 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size 7 [2021-02-24 00:31:14,066 WARN L141 QuantifierPusher]: treesize reduction 4, result has 77.8 percent of original size [2021-02-24 00:31:14,067 WARN L147 QuantifierPusher]: treesize reduction 4, result has 77.8 percent of original size 14 [2021-02-24 00:31:14,090 WARN L141 QuantifierPusher]: treesize reduction 23, result has 79.1 percent of original size [2021-02-24 00:31:14,094 WARN L147 QuantifierPusher]: treesize reduction 23, result has 79.1 percent of original size 87 [2021-02-24 00:31:14,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:14,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:14,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:14,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:14,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:31:14,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610920916] [2021-02-24 00:31:14,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:14,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:31:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958361832] [2021-02-24 00:31:14,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:31:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:14,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:31:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:31:14,238 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 9 states. [2021-02-24 00:31:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:14,747 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-02-24 00:31:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:31:14,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2021-02-24 00:31:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:14,752 INFO L225 Difference]: With dead ends: 82 [2021-02-24 00:31:14,753 INFO L226 Difference]: Without dead ends: 76 [2021-02-24 00:31:14,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:31:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-24 00:31:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 57. [2021-02-24 00:31:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-24 00:31:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-02-24 00:31:14,784 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 40 [2021-02-24 00:31:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:14,785 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-02-24 00:31:14,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:31:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-02-24 00:31:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-24 00:31:14,786 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:14,787 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:14,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:31:14,787 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:14,788 INFO L82 PathProgramCache]: Analyzing trace with hash 869151688, now seen corresponding path program 1 times [2021-02-24 00:31:14,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:14,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713361568] [2021-02-24 00:31:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:14,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:14,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:14,886 WARN L141 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size [2021-02-24 00:31:14,887 WARN L147 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size 7 [2021-02-24 00:31:14,899 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-02-24 00:31:14,905 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size 23 [2021-02-24 00:31:14,948 WARN L141 QuantifierPusher]: treesize reduction 9, result has 92.5 percent of original size [2021-02-24 00:31:14,953 WARN L147 QuantifierPusher]: treesize reduction 9, result has 92.5 percent of original size 111 [2021-02-24 00:31:15,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:15,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:15,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:15,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:15,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:31:15,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713361568] [2021-02-24 00:31:15,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:15,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:31:15,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381446801] [2021-02-24 00:31:15,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:31:15,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:31:15,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:31:15,091 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 9 states. [2021-02-24 00:31:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:15,474 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-02-24 00:31:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:31:15,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2021-02-24 00:31:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:15,476 INFO L225 Difference]: With dead ends: 82 [2021-02-24 00:31:15,476 INFO L226 Difference]: Without dead ends: 76 [2021-02-24 00:31:15,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:31:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-24 00:31:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-02-24 00:31:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-02-24 00:31:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-02-24 00:31:15,497 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 40 [2021-02-24 00:31:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:15,497 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-02-24 00:31:15,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:31:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-02-24 00:31:15,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-24 00:31:15,499 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:15,499 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:15,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:31:15,500 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:15,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1206079085, now seen corresponding path program 1 times [2021-02-24 00:31:15,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:15,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624697079] [2021-02-24 00:31:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:15,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:15,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:15,617 WARN L141 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size [2021-02-24 00:31:15,617 WARN L147 QuantifierPusher]: treesize reduction 8, result has 46.7 percent of original size 7 [2021-02-24 00:31:15,625 WARN L141 QuantifierPusher]: treesize reduction 4, result has 77.8 percent of original size [2021-02-24 00:31:15,626 WARN L147 QuantifierPusher]: treesize reduction 4, result has 77.8 percent of original size 14 [2021-02-24 00:31:15,640 WARN L141 QuantifierPusher]: treesize reduction 8, result has 92.7 percent of original size [2021-02-24 00:31:15,643 WARN L147 QuantifierPusher]: treesize reduction 8, result has 92.7 percent of original size 102 [2021-02-24 00:31:15,711 WARN L141 QuantifierPusher]: treesize reduction 4, result has 96.5 percent of original size [2021-02-24 00:31:15,715 WARN L147 QuantifierPusher]: treesize reduction 4, result has 96.5 percent of original size 109 [2021-02-24 00:31:15,791 WARN L141 QuantifierPusher]: treesize reduction 8, result has 96.1 percent of original size [2021-02-24 00:31:15,796 WARN L147 QuantifierPusher]: treesize reduction 8, result has 96.1 percent of original size 199 [2021-02-24 00:31:15,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:15,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:15,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:15,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:15,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:31:16,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624697079] [2021-02-24 00:31:16,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:16,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-24 00:31:16,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586298352] [2021-02-24 00:31:16,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 00:31:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 00:31:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:31:16,030 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 11 states. [2021-02-24 00:31:16,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:16,464 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-02-24 00:31:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:31:16,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2021-02-24 00:31:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:16,465 INFO L225 Difference]: With dead ends: 70 [2021-02-24 00:31:16,465 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:31:16,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:31:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:31:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:31:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:31:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:31:16,467 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-02-24 00:31:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:16,468 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:31:16,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 00:31:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:31:16,468 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:31:16,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:31:16,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:31:17,265 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-24 00:31:17,265 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-24 00:31:17,265 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-24 00:31:17,265 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,265 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,266 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:31:17,266 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,266 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:31:17,266 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,266 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,266 INFO L192 CegarLoopUtils]: At program point L3-6(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,266 INFO L192 CegarLoopUtils]: At program point L3-7(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,266 INFO L192 CegarLoopUtils]: At program point L3-8(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,267 INFO L192 CegarLoopUtils]: At program point L3-9(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,267 INFO L192 CegarLoopUtils]: At program point L3-10(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,269 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|)) [2021-02-24 00:31:17,269 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,269 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-24 00:31:17,269 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:31:17,270 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:31:17,270 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:31:17,270 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:31:17,270 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:31:17,270 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 11 25) the Hoare annotation is: true [2021-02-24 00:31:17,270 INFO L192 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-02-24 00:31:17,271 INFO L185 CegarLoopUtils]: At program point L17(lines 17 21) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,271 INFO L185 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,271 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (= main_~x~0 main_~w~0) [2021-02-24 00:31:17,271 INFO L185 CegarLoopUtils]: At program point L17-3(line 17) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,272 INFO L192 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: true [2021-02-24 00:31:17,272 INFO L185 CegarLoopUtils]: At program point L17-4(lines 16 22) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,272 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 11 25) the Hoare annotation is: true [2021-02-24 00:31:17,272 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 11 25) the Hoare annotation is: true [2021-02-24 00:31:17,272 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,272 INFO L185 CegarLoopUtils]: At program point L20-1(line 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,272 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,272 INFO L185 CegarLoopUtils]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2021-02-24 00:31:17,273 INFO L185 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,273 INFO L185 CegarLoopUtils]: At program point L20-3(line 20) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2021-02-24 00:31:17,273 INFO L185 CegarLoopUtils]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2021-02-24 00:31:17,274 INFO L185 CegarLoopUtils]: At program point L20-4(line 20) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2021-02-24 00:31:17,274 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,274 INFO L185 CegarLoopUtils]: At program point L18-3(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2021-02-24 00:31:17,274 INFO L185 CegarLoopUtils]: At program point L20-5(line 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,274 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (= main_~x~0 main_~w~0) [2021-02-24 00:31:17,275 INFO L185 CegarLoopUtils]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2021-02-24 00:31:17,276 INFO L185 CegarLoopUtils]: At program point L14-1(line 14) the Hoare annotation is: (= main_~x~0 main_~w~0) [2021-02-24 00:31:17,276 INFO L185 CegarLoopUtils]: At program point L16-3(line 16) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,276 INFO L185 CegarLoopUtils]: At program point L18-5(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,276 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-24 00:31:17,276 INFO L185 CegarLoopUtils]: At program point L16-4(lines 16 22) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2021-02-24 00:31:17,276 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-24 00:31:17,277 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-02-24 00:31:17,277 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:31:17,277 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:31:17,277 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:31:17,277 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-02-24 00:31:17,277 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:31:17,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:31:17 BoogieIcfgContainer [2021-02-24 00:31:17,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:31:17,309 INFO L168 Benchmark]: Toolchain (without parser) took 6041.81 ms. Allocated memory was 158.3 MB in the beginning and 199.2 MB in the end (delta: 40.9 MB). Free memory was 134.7 MB in the beginning and 77.2 MB in the end (delta: 57.5 MB). Peak memory consumption was 111.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:17,313 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 158.3 MB. Free memory is still 131.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:31:17,314 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.63 ms. Allocated memory is still 158.3 MB. Free memory was 133.6 MB in the beginning and 124.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:17,320 INFO L168 Benchmark]: Boogie Preprocessor took 43.91 ms. Allocated memory is still 158.3 MB. Free memory was 124.1 MB in the beginning and 122.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:17,320 INFO L168 Benchmark]: RCFGBuilder took 581.75 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 137.6 MB in the end (delta: -15.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:17,321 INFO L168 Benchmark]: TraceAbstraction took 5020.87 ms. Allocated memory was 158.3 MB in the beginning and 199.2 MB in the end (delta: 40.9 MB). Free memory was 137.2 MB in the beginning and 77.2 MB in the end (delta: 60.0 MB). Peak memory consumption was 113.2 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:17,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 158.3 MB. Free memory is still 131.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 360.63 ms. Allocated memory is still 158.3 MB. Free memory was 133.6 MB in the beginning and 124.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.91 ms. Allocated memory is still 158.3 MB. Free memory was 124.1 MB in the beginning and 122.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 581.75 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 137.6 MB in the end (delta: -15.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5020.87 ms. Allocated memory was 158.3 MB in the beginning and 199.2 MB in the end (delta: 40.9 MB). Free memory was 137.2 MB in the beginning and 77.2 MB in the end (delta: 60.0 MB). Peak memory consumption was 113.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: x == w && z == y - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 58 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 216 SDtfs, 329 SDslu, 354 SDs, 0 SdLazy, 605 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 48 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 55 LocationsWithAnnotation, 83 PreInvPairs, 107 NumberOfFragments, 260 HoareAnnotationTreeSize, 83 FomulaSimplifications, 6198 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 55 FomulaSimplificationsInter, 984 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 70650 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/7 InterpolantCoveringCapability, 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...