/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/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:47,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:47,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:47,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:47,933 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 00:16:47,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:47,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:47,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:47,948 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:47,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:47,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:47,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:47,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:47,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:47,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:47,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:47,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:47,951 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:47,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:47,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:47,952 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:47,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:47,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:47,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:47,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:47,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:47,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:47,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:48,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:48,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:48,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:48,349 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:48,349 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:48,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2021-02-24 00:16:48,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/441c68974/87d51f1db1e64039a79bb67b45756ac4/FLAG99a31930b [2021-02-24 00:16:49,118 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:49,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2021-02-24 00:16:49,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/441c68974/87d51f1db1e64039a79bb67b45756ac4/FLAG99a31930b [2021-02-24 00:16:49,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/441c68974/87d51f1db1e64039a79bb67b45756ac4 [2021-02-24 00:16:49,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:49,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:49,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:49,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:49,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:49,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:49" (1/1) ... [2021-02-24 00:16:49,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49cf6a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49, skipping insertion in model container [2021-02-24 00:16:49,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:49" (1/1) ... [2021-02-24 00:16:49,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:49,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:49,688 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i[812,825] [2021-02-24 00:16:49,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:49,710 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:49,725 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i[812,825] [2021-02-24 00:16:49,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:49,745 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:49,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49 WrapperNode [2021-02-24 00:16:49,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:49,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:49,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:49,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:49,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49" (1/1) ... [2021-02-24 00:16:49,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49" (1/1) ... [2021-02-24 00:16:49,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49" (1/1) ... [2021-02-24 00:16:49,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49" (1/1) ... [2021-02-24 00:16:49,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49" (1/1) ... [2021-02-24 00:16:49,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49" (1/1) ... [2021-02-24 00:16:49,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49" (1/1) ... [2021-02-24 00:16:49,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:49,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:49,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:49,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:49,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49" (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 00:16:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 00:16:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 00:16:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 00:16:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:50,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:50,340 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:16:50,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:50 BoogieIcfgContainer [2021-02-24 00:16:50,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:50,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:50,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:50,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:50,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:49" (1/3) ... [2021-02-24 00:16:50,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383e7eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:50, skipping insertion in model container [2021-02-24 00:16:50,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:49" (2/3) ... [2021-02-24 00:16:50,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383e7eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:50, skipping insertion in model container [2021-02-24 00:16:50,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:50" (3/3) ... [2021-02-24 00:16:50,370 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-02-24 00:16:50,388 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:50,396 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:50,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:50,458 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:50,458 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:50,458 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:50,458 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:50,458 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:50,459 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:50,459 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:50,459 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-24 00:16:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-24 00:16:50,485 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:50,486 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] [2021-02-24 00:16:50,486 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:50,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1758505504, now seen corresponding path program 1 times [2021-02-24 00:16:50,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:50,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326200634] [2021-02-24 00:16:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:50,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:50,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:50,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:50,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:16:50,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:50,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:50,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:50,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:50,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:50,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:50,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:50,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:50,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:50,961 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 00:16:50,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326200634] [2021-02-24 00:16:50,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:50,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:16:50,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442437652] [2021-02-24 00:16:50,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:16:50,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:16:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:16:50,990 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2021-02-24 00:16:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:51,588 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-02-24 00:16:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:16:51,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-02-24 00:16:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:51,600 INFO L225 Difference]: With dead ends: 65 [2021-02-24 00:16:51,600 INFO L226 Difference]: Without dead ends: 40 [2021-02-24 00:16:51,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:16:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-24 00:16:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-02-24 00:16:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-24 00:16:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-24 00:16:51,661 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2021-02-24 00:16:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:51,661 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-24 00:16:51,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:16:51,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-24 00:16:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 00:16:51,663 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:51,664 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] [2021-02-24 00:16:51,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:51,664 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash -878254983, now seen corresponding path program 1 times [2021-02-24 00:16:51,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:51,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408209760] [2021-02-24 00:16:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:51,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:51,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,830 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-24 00:16:51,831 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-24 00:16:51,850 WARN L141 QuantifierPusher]: treesize reduction 5, result has 66.7 percent of original size [2021-02-24 00:16:51,852 WARN L147 QuantifierPusher]: treesize reduction 5, result has 66.7 percent of original size 10 [2021-02-24 00:16:51,881 WARN L141 QuantifierPusher]: treesize reduction 13, result has 71.1 percent of original size [2021-02-24 00:16:51,883 WARN L147 QuantifierPusher]: treesize reduction 13, result has 71.1 percent of original size 32 [2021-02-24 00:16:51,951 WARN L141 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size [2021-02-24 00:16:51,953 WARN L147 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size 20 [2021-02-24 00:16:51,985 WARN L141 QuantifierPusher]: treesize reduction 14, result has 60.0 percent of original size [2021-02-24 00:16:51,987 WARN L147 QuantifierPusher]: treesize reduction 14, result has 60.0 percent of original size 21 [2021-02-24 00:16:52,034 WARN L141 QuantifierPusher]: treesize reduction 15, result has 46.4 percent of original size [2021-02-24 00:16:52,036 WARN L147 QuantifierPusher]: treesize reduction 15, result has 46.4 percent of original size 13 [2021-02-24 00:16:52,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:52,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:52,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:52,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:52,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:52,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:52,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:52,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:52,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:52,286 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 00:16:52,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408209760] [2021-02-24 00:16:52,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:52,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:16:52,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460265688] [2021-02-24 00:16:52,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:16:52,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:16:52,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:16:52,295 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2021-02-24 00:16:52,859 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-02-24 00:16:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:53,342 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-02-24 00:16:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 00:16:53,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2021-02-24 00:16:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:53,360 INFO L225 Difference]: With dead ends: 67 [2021-02-24 00:16:53,361 INFO L226 Difference]: Without dead ends: 62 [2021-02-24 00:16:53,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-02-24 00:16:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-24 00:16:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2021-02-24 00:16:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-24 00:16:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-02-24 00:16:53,404 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 31 [2021-02-24 00:16:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:53,404 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-02-24 00:16:53,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:16:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-02-24 00:16:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-24 00:16:53,408 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:53,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:53,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:53,409 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2003708337, now seen corresponding path program 1 times [2021-02-24 00:16:53,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:53,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096569527] [2021-02-24 00:16:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:53,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:53,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:53,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:53,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:53,528 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-24 00:16:53,529 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-24 00:16:53,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:53,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:53,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:53,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:53,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096569527] [2021-02-24 00:16:53,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:53,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:16:53,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886472605] [2021-02-24 00:16:53,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:16:53,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:53,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:16:53,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:16:53,625 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 9 states. [2021-02-24 00:16:54,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:54,203 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-02-24 00:16:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:16:54,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2021-02-24 00:16:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:54,217 INFO L225 Difference]: With dead ends: 67 [2021-02-24 00:16:54,217 INFO L226 Difference]: Without dead ends: 45 [2021-02-24 00:16:54,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:16:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-24 00:16:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-02-24 00:16:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-24 00:16:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-02-24 00:16:54,246 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2021-02-24 00:16:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:54,247 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-02-24 00:16:54,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:16:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-02-24 00:16:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-24 00:16:54,251 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:54,251 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:54,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:54,252 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1773384192, now seen corresponding path program 2 times [2021-02-24 00:16:54,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:54,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509683313] [2021-02-24 00:16:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:54,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:54,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:54,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:54,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:16:54,387 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-24 00:16:54,388 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-24 00:16:54,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:16:54,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:16:54,470 WARN L141 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size [2021-02-24 00:16:54,472 WARN L147 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size 19 [2021-02-24 00:16:54,513 WARN L141 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size [2021-02-24 00:16:54,515 WARN L147 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size 19 [2021-02-24 00:16:54,556 WARN L141 QuantifierPusher]: treesize reduction 14, result has 60.0 percent of original size [2021-02-24 00:16:54,558 WARN L147 QuantifierPusher]: treesize reduction 14, result has 60.0 percent of original size 21 [2021-02-24 00:16:54,593 WARN L141 QuantifierPusher]: treesize reduction 15, result has 46.4 percent of original size [2021-02-24 00:16:54,594 WARN L147 QuantifierPusher]: treesize reduction 15, result has 46.4 percent of original size 13 [2021-02-24 00:16:54,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:54,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:54,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:54,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:54,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:54,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:54,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509683313] [2021-02-24 00:16:54,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:54,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-24 00:16:54,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554380813] [2021-02-24 00:16:54,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-24 00:16:54,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:54,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-24 00:16:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-24 00:16:54,757 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2021-02-24 00:16:55,264 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-24 00:16:55,450 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-02-24 00:16:55,632 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-02-24 00:16:55,776 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-02-24 00:16:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:56,590 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-02-24 00:16:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-24 00:16:56,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2021-02-24 00:16:56,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:56,593 INFO L225 Difference]: With dead ends: 62 [2021-02-24 00:16:56,593 INFO L226 Difference]: Without dead ends: 57 [2021-02-24 00:16:56,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-02-24 00:16:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-24 00:16:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-02-24 00:16:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-24 00:16:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-02-24 00:16:56,609 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 40 [2021-02-24 00:16:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:56,609 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-02-24 00:16:56,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-24 00:16:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-02-24 00:16:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-24 00:16:56,610 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:56,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-02-24 00:16:56,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:16:56,611 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:56,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1469590742, now seen corresponding path program 2 times [2021-02-24 00:16:56,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:56,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552311023] [2021-02-24 00:16:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:56,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:56,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:56,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:56,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:56,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:56,762 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-24 00:16:56,765 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-24 00:16:56,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:56,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:56,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:56,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:56,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:56,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:56,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:56,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:56,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:56,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552311023] [2021-02-24 00:16:56,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:56,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-02-24 00:16:56,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878811051] [2021-02-24 00:16:56,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-24 00:16:56,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:56,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-24 00:16:56,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:16:56,972 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 13 states. [2021-02-24 00:16:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:58,199 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-02-24 00:16:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-24 00:16:58,200 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2021-02-24 00:16:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:58,202 INFO L225 Difference]: With dead ends: 68 [2021-02-24 00:16:58,202 INFO L226 Difference]: Without dead ends: 54 [2021-02-24 00:16:58,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2021-02-24 00:16:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-24 00:16:58,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-02-24 00:16:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-24 00:16:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-02-24 00:16:58,217 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2021-02-24 00:16:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:58,218 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-02-24 00:16:58,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-24 00:16:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-02-24 00:16:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-24 00:16:58,219 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:58,219 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:16:58,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:16:58,220 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:58,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2071473241, now seen corresponding path program 3 times [2021-02-24 00:16:58,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:58,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688254060] [2021-02-24 00:16:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:58,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:58,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:58,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:58,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:16:58,327 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-24 00:16:58,331 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-24 00:16:58,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:16:58,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:16:58,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:16:58,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:16:58,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:16:58,468 WARN L141 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size [2021-02-24 00:16:58,469 WARN L147 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size 19 [2021-02-24 00:16:58,504 WARN L141 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size [2021-02-24 00:16:58,505 WARN L147 QuantifierPusher]: treesize reduction 14, result has 57.6 percent of original size 19 [2021-02-24 00:16:58,542 WARN L141 QuantifierPusher]: treesize reduction 14, result has 60.0 percent of original size [2021-02-24 00:16:58,543 WARN L147 QuantifierPusher]: treesize reduction 14, result has 60.0 percent of original size 21 [2021-02-24 00:16:58,579 WARN L141 QuantifierPusher]: treesize reduction 15, result has 46.4 percent of original size [2021-02-24 00:16:58,580 WARN L147 QuantifierPusher]: treesize reduction 15, result has 46.4 percent of original size 13 [2021-02-24 00:16:58,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:58,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:58,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:58,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:58,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:58,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 00:16:58,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688254060] [2021-02-24 00:16:58,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:58,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-24 00:16:58,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469208369] [2021-02-24 00:16:58,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-24 00:16:58,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:58,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-24 00:16:58,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:16:58,772 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2021-02-24 00:16:59,416 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-02-24 00:16:59,559 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-02-24 00:17:00,051 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-02-24 00:17:00,227 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-24 00:17:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:00,606 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-02-24 00:17:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-24 00:17:00,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2021-02-24 00:17:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:00,608 INFO L225 Difference]: With dead ends: 70 [2021-02-24 00:17:00,608 INFO L226 Difference]: Without dead ends: 65 [2021-02-24 00:17:00,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-02-24 00:17:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-24 00:17:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2021-02-24 00:17:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-24 00:17:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-02-24 00:17:00,627 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 49 [2021-02-24 00:17:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:00,628 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-02-24 00:17:00,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-24 00:17:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-02-24 00:17:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-24 00:17:00,629 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:00,629 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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 00:17:00,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:17:00,630 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:00,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1911734737, now seen corresponding path program 3 times [2021-02-24 00:17:00,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:00,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74853956] [2021-02-24 00:17:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:00,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:00,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:00,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:00,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:00,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:00,731 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-24 00:17:00,732 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-24 00:17:00,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:00,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:00,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:00,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:00,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:00,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:00,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:00,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:00,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:00,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:01,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:01,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:01,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74853956] [2021-02-24 00:17:01,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:01,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-24 00:17:01,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046907702] [2021-02-24 00:17:01,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-24 00:17:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-24 00:17:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:17:01,054 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 17 states. [2021-02-24 00:17:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:02,606 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-02-24 00:17:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-24 00:17:02,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2021-02-24 00:17:02,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:02,608 INFO L225 Difference]: With dead ends: 86 [2021-02-24 00:17:02,608 INFO L226 Difference]: Without dead ends: 72 [2021-02-24 00:17:02,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2021-02-24 00:17:02,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-24 00:17:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-02-24 00:17:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-02-24 00:17:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-02-24 00:17:02,629 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 57 [2021-02-24 00:17:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:02,630 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-02-24 00:17:02,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-24 00:17:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-02-24 00:17:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-24 00:17:02,631 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:02,632 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 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 00:17:02,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 00:17:02,632 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1723621130, now seen corresponding path program 4 times [2021-02-24 00:17:02,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:02,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833743475] [2021-02-24 00:17:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:02,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:02,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:02,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:02,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:02,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:17:02,785 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-24 00:17:02,786 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-24 00:17:02,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:02,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:02,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:02,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:02,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:02,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:02,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:02,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:02,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:02,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:02,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:03,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:03,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:03,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:03,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:03,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:03,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:17:03,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:03,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:03,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:03,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:03,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:03,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833743475] [2021-02-24 00:17:03,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:17:03,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-02-24 00:17:03,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838035206] [2021-02-24 00:17:03,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-24 00:17:03,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:03,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-24 00:17:03,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-02-24 00:17:03,206 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 21 states. [2021-02-24 00:17:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:05,354 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-02-24 00:17:05,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-24 00:17:05,355 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2021-02-24 00:17:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:05,356 INFO L225 Difference]: With dead ends: 94 [2021-02-24 00:17:05,356 INFO L226 Difference]: Without dead ends: 80 [2021-02-24 00:17:05,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=508, Invalid=1654, Unknown=0, NotChecked=0, Total=2162 [2021-02-24 00:17:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-24 00:17:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-02-24 00:17:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-24 00:17:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-02-24 00:17:05,379 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 66 [2021-02-24 00:17:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:05,379 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-02-24 00:17:05,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-24 00:17:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-02-24 00:17:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-02-24 00:17:05,381 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:05,381 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 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 00:17:05,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 00:17:05,382 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:05,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:05,382 INFO L82 PathProgramCache]: Analyzing trace with hash -852333041, now seen corresponding path program 5 times [2021-02-24 00:17:05,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:05,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499415896] [2021-02-24 00:17:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:05,408 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:05,428 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:05,476 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:17:05,476 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:17:05,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-24 00:17:05,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:05 BoogieIcfgContainer [2021-02-24 00:17:05,575 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:05,576 INFO L168 Benchmark]: Toolchain (without parser) took 16082.62 ms. Allocated memory was 151.0 MB in the beginning and 220.2 MB in the end (delta: 69.2 MB). Free memory was 128.5 MB in the beginning and 81.2 MB in the end (delta: 47.3 MB). Peak memory consumption was 117.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:05,577 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.3 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:05,579 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.41 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:05,580 INFO L168 Benchmark]: Boogie Preprocessor took 42.15 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:05,580 INFO L168 Benchmark]: RCFGBuilder took 556.46 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 132.7 MB in the end (delta: -16.5 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:05,581 INFO L168 Benchmark]: TraceAbstraction took 15226.64 ms. Allocated memory was 151.0 MB in the beginning and 220.2 MB in the end (delta: 69.2 MB). Free memory was 132.1 MB in the beginning and 81.2 MB in the end (delta: 50.9 MB). Peak memory consumption was 119.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:05,584 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.3 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 236.41 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.15 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 556.46 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 132.7 MB in the end (delta: -16.5 MB). Peak memory consumption was 16.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15226.64 ms. Allocated memory was 151.0 MB in the beginning and 220.2 MB in the end (delta: 69.2 MB). Free memory was 132.1 MB in the beginning and 81.2 MB in the end (delta: 50.9 MB). Peak memory consumption was 119.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; VAL [__VERIFIER_nondet_uint()=6, j=10, n=6] [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; VAL [j=10, n=6, n=0] [L24] i=1 VAL [i=1, j=10, n=0, n=6] [L24] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L25] COND TRUE i