/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:34:19,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:34:19,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:34:19,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:34:19,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-23 13:34:19,783 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:34:19,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:34:19,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:34:19,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:34:19,788 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:34:19,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:34:19,789 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:34:19,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:34:19,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:34:19,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:34:19,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:34:19,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:34:19,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:34:19,791 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:34:19,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:34:19,791 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:34:19,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:34:19,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:34:19,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:34:19,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:34:19,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:34:19,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:34:19,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:34:19,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:34:19,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:34:19,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:34:19,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:34:19,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:34:19,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:34:20,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:34:20,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:34:20,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:34:20,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:34:20,260 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:34:20,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2021-02-23 13:34:20,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07cc4a9c8/1050faccf96f4085b5b40ec33c7bfc34/FLAGb0f77b276 [2021-02-23 13:34:21,012 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:34:21,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2021-02-23 13:34:21,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07cc4a9c8/1050faccf96f4085b5b40ec33c7bfc34/FLAGb0f77b276 [2021-02-23 13:34:21,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07cc4a9c8/1050faccf96f4085b5b40ec33c7bfc34 [2021-02-23 13:34:21,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:34:21,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:34:21,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:21,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:34:21,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:34:21,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9600e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21, skipping insertion in model container [2021-02-23 13:34:21,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:34:21,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:34:21,623 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c[2881,2894] [2021-02-23 13:34:21,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:21,637 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:34:21,666 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c[2881,2894] [2021-02-23 13:34:21,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:21,687 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:34:21,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21 WrapperNode [2021-02-23 13:34:21,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:21,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:34:21,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:34:21,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:34:21,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:34:21,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:34:21,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:34:21,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:34:21,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:34:21,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:34:21,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:34:21,847 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:34:21,847 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:34:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:34:21,847 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:34:21,848 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:34:21,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:34:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:34:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:34:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:34:21,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:34:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:34:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:34:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:34:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:34:22,198 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:34:22,198 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 13:34:22,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:22 BoogieIcfgContainer [2021-02-23 13:34:22,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:34:22,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:34:22,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:34:22,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:34:22,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:34:21" (1/3) ... [2021-02-23 13:34:22,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a123012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:22, skipping insertion in model container [2021-02-23 13:34:22,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (2/3) ... [2021-02-23 13:34:22,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a123012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:22, skipping insertion in model container [2021-02-23 13:34:22,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:22" (3/3) ... [2021-02-23 13:34:22,215 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2021-02-23 13:34:22,223 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:34:22,228 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:34:22,252 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:34:22,280 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:34:22,281 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:34:22,281 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:34:22,281 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:34:22,281 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:34:22,281 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:34:22,282 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:34:22,282 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:34:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-23 13:34:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 13:34:22,307 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:22,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:22,308 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:22,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1576798563, now seen corresponding path program 1 times [2021-02-23 13:34:22,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:22,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108996911] [2021-02-23 13:34:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,558 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:22,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:22,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108996911] [2021-02-23 13:34:22,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:22,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:22,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689363970] [2021-02-23 13:34:22,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:22,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:22,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:22,665 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2021-02-23 13:34:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:22,887 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2021-02-23 13:34:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:22,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-23 13:34:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:22,906 INFO L225 Difference]: With dead ends: 70 [2021-02-23 13:34:22,907 INFO L226 Difference]: Without dead ends: 55 [2021-02-23 13:34:22,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-23 13:34:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-02-23 13:34:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-23 13:34:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 66 transitions. [2021-02-23 13:34:22,986 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 66 transitions. Word has length 18 [2021-02-23 13:34:22,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:22,987 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 66 transitions. [2021-02-23 13:34:22,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 66 transitions. [2021-02-23 13:34:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 13:34:22,988 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:22,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:22,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:34:22,989 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:22,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:22,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1969825573, now seen corresponding path program 1 times [2021-02-23 13:34:22,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:22,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263093705] [2021-02-23 13:34:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263093705] [2021-02-23 13:34:23,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810614039] [2021-02-23 13:34:23,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,159 INFO L87 Difference]: Start difference. First operand 39 states and 66 transitions. Second operand 4 states. [2021-02-23 13:34:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,391 INFO L93 Difference]: Finished difference Result 88 states and 153 transitions. [2021-02-23 13:34:23,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-23 13:34:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,395 INFO L225 Difference]: With dead ends: 88 [2021-02-23 13:34:23,395 INFO L226 Difference]: Without dead ends: 55 [2021-02-23 13:34:23,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-23 13:34:23,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-02-23 13:34:23,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-23 13:34:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 90 transitions. [2021-02-23 13:34:23,426 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 90 transitions. Word has length 18 [2021-02-23 13:34:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,427 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 90 transitions. [2021-02-23 13:34:23,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 90 transitions. [2021-02-23 13:34:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:23,431 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:34:23,432 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1635900842, now seen corresponding path program 1 times [2021-02-23 13:34:23,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731862345] [2021-02-23 13:34:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:23,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731862345] [2021-02-23 13:34:23,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523208936] [2021-02-23 13:34:23,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,609 INFO L87 Difference]: Start difference. First operand 53 states and 90 transitions. Second operand 4 states. [2021-02-23 13:34:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,802 INFO L93 Difference]: Finished difference Result 82 states and 136 transitions. [2021-02-23 13:34:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,808 INFO L225 Difference]: With dead ends: 82 [2021-02-23 13:34:23,808 INFO L226 Difference]: Without dead ends: 58 [2021-02-23 13:34:23,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-23 13:34:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-02-23 13:34:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-23 13:34:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 92 transitions. [2021-02-23 13:34:23,838 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 92 transitions. Word has length 19 [2021-02-23 13:34:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,838 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 92 transitions. [2021-02-23 13:34:23,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 92 transitions. [2021-02-23 13:34:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:23,841 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:34:23,842 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,842 INFO L82 PathProgramCache]: Analyzing trace with hash -934836264, now seen corresponding path program 1 times [2021-02-23 13:34:23,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436783119] [2021-02-23 13:34:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436783119] [2021-02-23 13:34:23,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701720879] [2021-02-23 13:34:23,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,974 INFO L87 Difference]: Start difference. First operand 56 states and 92 transitions. Second operand 4 states. [2021-02-23 13:34:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,113 INFO L93 Difference]: Finished difference Result 148 states and 252 transitions. [2021-02-23 13:34:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,117 INFO L225 Difference]: With dead ends: 148 [2021-02-23 13:34:24,117 INFO L226 Difference]: Without dead ends: 101 [2021-02-23 13:34:24,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-23 13:34:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-02-23 13:34:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-23 13:34:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 165 transitions. [2021-02-23 13:34:24,142 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 165 transitions. Word has length 19 [2021-02-23 13:34:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,143 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 165 transitions. [2021-02-23 13:34:24,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 165 transitions. [2021-02-23 13:34:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:24,144 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:24,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:34:24,146 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,146 INFO L82 PathProgramCache]: Analyzing trace with hash -541809254, now seen corresponding path program 1 times [2021-02-23 13:34:24,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055107008] [2021-02-23 13:34:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055107008] [2021-02-23 13:34:24,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089201408] [2021-02-23 13:34:24,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,246 INFO L87 Difference]: Start difference. First operand 99 states and 165 transitions. Second operand 4 states. [2021-02-23 13:34:24,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,353 INFO L93 Difference]: Finished difference Result 127 states and 211 transitions. [2021-02-23 13:34:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,355 INFO L225 Difference]: With dead ends: 127 [2021-02-23 13:34:24,355 INFO L226 Difference]: Without dead ends: 125 [2021-02-23 13:34:24,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-23 13:34:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2021-02-23 13:34:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-23 13:34:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 163 transitions. [2021-02-23 13:34:24,364 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 163 transitions. Word has length 19 [2021-02-23 13:34:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,365 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 163 transitions. [2021-02-23 13:34:24,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 163 transitions. [2021-02-23 13:34:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:24,366 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:24,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 13:34:24,367 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1085061584, now seen corresponding path program 1 times [2021-02-23 13:34:24,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172856096] [2021-02-23 13:34:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172856096] [2021-02-23 13:34:24,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424647850] [2021-02-23 13:34:24,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,423 INFO L87 Difference]: Start difference. First operand 99 states and 163 transitions. Second operand 4 states. [2021-02-23 13:34:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,527 INFO L93 Difference]: Finished difference Result 179 states and 299 transitions. [2021-02-23 13:34:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,529 INFO L225 Difference]: With dead ends: 179 [2021-02-23 13:34:24,530 INFO L226 Difference]: Without dead ends: 177 [2021-02-23 13:34:24,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-23 13:34:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2021-02-23 13:34:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-23 13:34:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 221 transitions. [2021-02-23 13:34:24,540 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 221 transitions. Word has length 20 [2021-02-23 13:34:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,541 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 221 transitions. [2021-02-23 13:34:24,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 221 transitions. [2021-02-23 13:34:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:24,542 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:24,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 13:34:24,543 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash 692034574, now seen corresponding path program 1 times [2021-02-23 13:34:24,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097402693] [2021-02-23 13:34:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097402693] [2021-02-23 13:34:24,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459448141] [2021-02-23 13:34:24,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,608 INFO L87 Difference]: Start difference. First operand 135 states and 221 transitions. Second operand 4 states. [2021-02-23 13:34:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,709 INFO L93 Difference]: Finished difference Result 311 states and 515 transitions. [2021-02-23 13:34:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:24,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,711 INFO L225 Difference]: With dead ends: 311 [2021-02-23 13:34:24,711 INFO L226 Difference]: Without dead ends: 185 [2021-02-23 13:34:24,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-23 13:34:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-02-23 13:34:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-02-23 13:34:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 295 transitions. [2021-02-23 13:34:24,725 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 295 transitions. Word has length 20 [2021-02-23 13:34:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,726 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 295 transitions. [2021-02-23 13:34:24,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 295 transitions. [2021-02-23 13:34:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:24,727 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,727 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] [2021-02-23 13:34:24,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 13:34:24,728 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,728 INFO L82 PathProgramCache]: Analyzing trace with hash -722614227, now seen corresponding path program 1 times [2021-02-23 13:34:24,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295173971] [2021-02-23 13:34:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:24,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295173971] [2021-02-23 13:34:24,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985424856] [2021-02-23 13:34:24,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,778 INFO L87 Difference]: Start difference. First operand 183 states and 295 transitions. Second operand 4 states. [2021-02-23 13:34:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,894 INFO L93 Difference]: Finished difference Result 277 states and 445 transitions. [2021-02-23 13:34:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,898 INFO L225 Difference]: With dead ends: 277 [2021-02-23 13:34:24,898 INFO L226 Difference]: Without dead ends: 191 [2021-02-23 13:34:24,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-02-23 13:34:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2021-02-23 13:34:24,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-23 13:34:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 299 transitions. [2021-02-23 13:34:24,917 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 299 transitions. Word has length 21 [2021-02-23 13:34:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,918 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 299 transitions. [2021-02-23 13:34:24,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 299 transitions. [2021-02-23 13:34:24,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:24,921 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,921 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] [2021-02-23 13:34:24,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 13:34:24,921 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,922 INFO L82 PathProgramCache]: Analyzing trace with hash -21549649, now seen corresponding path program 1 times [2021-02-23 13:34:24,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668838446] [2021-02-23 13:34:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668838446] [2021-02-23 13:34:24,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283730129] [2021-02-23 13:34:24,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,993 INFO L87 Difference]: Start difference. First operand 189 states and 299 transitions. Second operand 4 states. [2021-02-23 13:34:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,092 INFO L93 Difference]: Finished difference Result 333 states and 533 transitions. [2021-02-23 13:34:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,095 INFO L225 Difference]: With dead ends: 333 [2021-02-23 13:34:25,095 INFO L226 Difference]: Without dead ends: 331 [2021-02-23 13:34:25,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-02-23 13:34:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 265. [2021-02-23 13:34:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2021-02-23 13:34:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 411 transitions. [2021-02-23 13:34:25,107 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 411 transitions. Word has length 21 [2021-02-23 13:34:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,107 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 411 transitions. [2021-02-23 13:34:25,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 411 transitions. [2021-02-23 13:34:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:25,109 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,109 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] [2021-02-23 13:34:25,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 13:34:25,109 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,110 INFO L82 PathProgramCache]: Analyzing trace with hash -414576659, now seen corresponding path program 1 times [2021-02-23 13:34:25,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118888916] [2021-02-23 13:34:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:25,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118888916] [2021-02-23 13:34:25,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869591700] [2021-02-23 13:34:25,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,161 INFO L87 Difference]: Start difference. First operand 265 states and 411 transitions. Second operand 4 states. [2021-02-23 13:34:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,273 INFO L93 Difference]: Finished difference Result 605 states and 941 transitions. [2021-02-23 13:34:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,276 INFO L225 Difference]: With dead ends: 605 [2021-02-23 13:34:25,276 INFO L226 Difference]: Without dead ends: 355 [2021-02-23 13:34:25,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-02-23 13:34:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2021-02-23 13:34:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2021-02-23 13:34:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 535 transitions. [2021-02-23 13:34:25,293 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 535 transitions. Word has length 21 [2021-02-23 13:34:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,293 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 535 transitions. [2021-02-23 13:34:25,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 535 transitions. [2021-02-23 13:34:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:25,294 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,295 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] [2021-02-23 13:34:25,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 13:34:25,295 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,296 INFO L82 PathProgramCache]: Analyzing trace with hash -667823741, now seen corresponding path program 1 times [2021-02-23 13:34:25,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481379554] [2021-02-23 13:34:25,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:25,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481379554] [2021-02-23 13:34:25,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216329656] [2021-02-23 13:34:25,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,345 INFO L87 Difference]: Start difference. First operand 353 states and 535 transitions. Second operand 4 states. [2021-02-23 13:34:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,444 INFO L93 Difference]: Finished difference Result 529 states and 797 transitions. [2021-02-23 13:34:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,447 INFO L225 Difference]: With dead ends: 529 [2021-02-23 13:34:25,447 INFO L226 Difference]: Without dead ends: 363 [2021-02-23 13:34:25,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-02-23 13:34:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2021-02-23 13:34:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2021-02-23 13:34:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 535 transitions. [2021-02-23 13:34:25,463 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 535 transitions. Word has length 22 [2021-02-23 13:34:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,463 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 535 transitions. [2021-02-23 13:34:25,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 535 transitions. [2021-02-23 13:34:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:25,464 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,464 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] [2021-02-23 13:34:25,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 13:34:25,465 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash 33240837, now seen corresponding path program 1 times [2021-02-23 13:34:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489430350] [2021-02-23 13:34:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:25,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489430350] [2021-02-23 13:34:25,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277328558] [2021-02-23 13:34:25,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,519 INFO L87 Difference]: Start difference. First operand 361 states and 535 transitions. Second operand 4 states. [2021-02-23 13:34:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,634 INFO L93 Difference]: Finished difference Result 621 states and 929 transitions. [2021-02-23 13:34:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,638 INFO L225 Difference]: With dead ends: 621 [2021-02-23 13:34:25,638 INFO L226 Difference]: Without dead ends: 619 [2021-02-23 13:34:25,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-02-23 13:34:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 521. [2021-02-23 13:34:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2021-02-23 13:34:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 751 transitions. [2021-02-23 13:34:25,660 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 751 transitions. Word has length 22 [2021-02-23 13:34:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,661 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 751 transitions. [2021-02-23 13:34:25,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 751 transitions. [2021-02-23 13:34:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:25,662 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,662 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] [2021-02-23 13:34:25,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 13:34:25,662 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,663 INFO L82 PathProgramCache]: Analyzing trace with hash -359786173, now seen corresponding path program 1 times [2021-02-23 13:34:25,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099294700] [2021-02-23 13:34:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:25,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099294700] [2021-02-23 13:34:25,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940989756] [2021-02-23 13:34:25,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,716 INFO L87 Difference]: Start difference. First operand 521 states and 751 transitions. Second operand 4 states. [2021-02-23 13:34:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,858 INFO L93 Difference]: Finished difference Result 1181 states and 1697 transitions. [2021-02-23 13:34:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,862 INFO L225 Difference]: With dead ends: 1181 [2021-02-23 13:34:25,863 INFO L226 Difference]: Without dead ends: 683 [2021-02-23 13:34:25,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-02-23 13:34:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 681. [2021-02-23 13:34:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2021-02-23 13:34:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 951 transitions. [2021-02-23 13:34:25,896 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 951 transitions. Word has length 22 [2021-02-23 13:34:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,896 INFO L480 AbstractCegarLoop]: Abstraction has 681 states and 951 transitions. [2021-02-23 13:34:25,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 951 transitions. [2021-02-23 13:34:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:34:25,898 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,898 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] [2021-02-23 13:34:25,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 13:34:25,898 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1030681666, now seen corresponding path program 1 times [2021-02-23 13:34:25,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068318175] [2021-02-23 13:34:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,915 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:25,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068318175] [2021-02-23 13:34:25,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245294046] [2021-02-23 13:34:25,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,950 INFO L87 Difference]: Start difference. First operand 681 states and 951 transitions. Second operand 4 states. [2021-02-23 13:34:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:26,073 INFO L93 Difference]: Finished difference Result 1021 states and 1417 transitions. [2021-02-23 13:34:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:26,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-23 13:34:26,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:26,078 INFO L225 Difference]: With dead ends: 1021 [2021-02-23 13:34:26,078 INFO L226 Difference]: Without dead ends: 699 [2021-02-23 13:34:26,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-02-23 13:34:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2021-02-23 13:34:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2021-02-23 13:34:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 951 transitions. [2021-02-23 13:34:26,111 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 951 transitions. Word has length 23 [2021-02-23 13:34:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:26,112 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 951 transitions. [2021-02-23 13:34:26,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 951 transitions. [2021-02-23 13:34:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:34:26,113 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:26,113 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] [2021-02-23 13:34:26,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 13:34:26,114 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1731746244, now seen corresponding path program 1 times [2021-02-23 13:34:26,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:26,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924528684] [2021-02-23 13:34:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:26,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:26,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924528684] [2021-02-23 13:34:26,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:26,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:26,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279155805] [2021-02-23 13:34:26,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:26,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:26,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:26,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:26,167 INFO L87 Difference]: Start difference. First operand 697 states and 951 transitions. Second operand 4 states. [2021-02-23 13:34:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:26,297 INFO L93 Difference]: Finished difference Result 1165 states and 1593 transitions. [2021-02-23 13:34:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:26,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-23 13:34:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:26,303 INFO L225 Difference]: With dead ends: 1165 [2021-02-23 13:34:26,303 INFO L226 Difference]: Without dead ends: 1163 [2021-02-23 13:34:26,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:26,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-02-23 13:34:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1033. [2021-02-23 13:34:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2021-02-23 13:34:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1367 transitions. [2021-02-23 13:34:26,371 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1367 transitions. Word has length 23 [2021-02-23 13:34:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:26,371 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 1367 transitions. [2021-02-23 13:34:26,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1367 transitions. [2021-02-23 13:34:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:34:26,374 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:26,374 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] [2021-02-23 13:34:26,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 13:34:26,374 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:26,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1338719234, now seen corresponding path program 1 times [2021-02-23 13:34:26,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:26,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380652233] [2021-02-23 13:34:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:26,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:26,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380652233] [2021-02-23 13:34:26,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:26,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:26,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966184346] [2021-02-23 13:34:26,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:26,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:26,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:26,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:26,438 INFO L87 Difference]: Start difference. First operand 1033 states and 1367 transitions. Second operand 4 states. [2021-02-23 13:34:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:26,588 INFO L93 Difference]: Finished difference Result 2317 states and 3033 transitions. [2021-02-23 13:34:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:26,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-23 13:34:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:26,595 INFO L225 Difference]: With dead ends: 2317 [2021-02-23 13:34:26,595 INFO L226 Difference]: Without dead ends: 1323 [2021-02-23 13:34:26,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-02-23 13:34:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1321. [2021-02-23 13:34:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1321 states. [2021-02-23 13:34:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1671 transitions. [2021-02-23 13:34:26,652 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1671 transitions. Word has length 23 [2021-02-23 13:34:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:26,652 INFO L480 AbstractCegarLoop]: Abstraction has 1321 states and 1671 transitions. [2021-02-23 13:34:26,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1671 transitions. [2021-02-23 13:34:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:34:26,654 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:26,654 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] [2021-02-23 13:34:26,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 13:34:26,655 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:26,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2144742072, now seen corresponding path program 1 times [2021-02-23 13:34:26,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:26,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785966065] [2021-02-23 13:34:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:26,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:26,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785966065] [2021-02-23 13:34:26,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:26,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:26,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678789152] [2021-02-23 13:34:26,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:26,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:26,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:26,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:26,705 INFO L87 Difference]: Start difference. First operand 1321 states and 1671 transitions. Second operand 4 states. [2021-02-23 13:34:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:26,845 INFO L93 Difference]: Finished difference Result 1981 states and 2489 transitions. [2021-02-23 13:34:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:26,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-23 13:34:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:26,852 INFO L225 Difference]: With dead ends: 1981 [2021-02-23 13:34:26,853 INFO L226 Difference]: Without dead ends: 1355 [2021-02-23 13:34:26,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-02-23 13:34:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2021-02-23 13:34:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1353 states. [2021-02-23 13:34:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1671 transitions. [2021-02-23 13:34:26,919 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1671 transitions. Word has length 24 [2021-02-23 13:34:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:26,920 INFO L480 AbstractCegarLoop]: Abstraction has 1353 states and 1671 transitions. [2021-02-23 13:34:26,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1671 transitions. [2021-02-23 13:34:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:34:26,922 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:26,922 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] [2021-02-23 13:34:26,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 13:34:26,923 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:26,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1449160646, now seen corresponding path program 1 times [2021-02-23 13:34:26,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:26,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498229659] [2021-02-23 13:34:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:26,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:26,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:26,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:27,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498229659] [2021-02-23 13:34:27,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:27,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:27,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412731614] [2021-02-23 13:34:27,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:27,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:27,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:27,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:27,002 INFO L87 Difference]: Start difference. First operand 1353 states and 1671 transitions. Second operand 4 states. [2021-02-23 13:34:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:27,179 INFO L93 Difference]: Finished difference Result 2187 states and 2664 transitions. [2021-02-23 13:34:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:27,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-23 13:34:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:27,191 INFO L225 Difference]: With dead ends: 2187 [2021-02-23 13:34:27,192 INFO L226 Difference]: Without dead ends: 2185 [2021-02-23 13:34:27,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-02-23 13:34:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2057. [2021-02-23 13:34:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2057 states. [2021-02-23 13:34:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 2471 transitions. [2021-02-23 13:34:27,300 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 2471 transitions. Word has length 24 [2021-02-23 13:34:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:27,301 INFO L480 AbstractCegarLoop]: Abstraction has 2057 states and 2471 transitions. [2021-02-23 13:34:27,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 2471 transitions. [2021-02-23 13:34:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:34:27,306 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:27,306 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] [2021-02-23 13:34:27,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 13:34:27,306 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1842187656, now seen corresponding path program 1 times [2021-02-23 13:34:27,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:27,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856254548] [2021-02-23 13:34:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:27,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:27,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:27,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:27,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:27,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856254548] [2021-02-23 13:34:27,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:27,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:27,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484397387] [2021-02-23 13:34:27,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:27,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:27,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:27,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:27,373 INFO L87 Difference]: Start difference. First operand 2057 states and 2471 transitions. Second operand 4 states. [2021-02-23 13:34:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:27,565 INFO L93 Difference]: Finished difference Result 4553 states and 5351 transitions. [2021-02-23 13:34:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:27,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-23 13:34:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:27,566 INFO L225 Difference]: With dead ends: 4553 [2021-02-23 13:34:27,566 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 13:34:27,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 13:34:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 13:34:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 13:34:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 13:34:27,574 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-02-23 13:34:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:27,574 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 13:34:27,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 13:34:27,574 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 13:34:27,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 13:34:27,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 13:34:29,711 WARN L202 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 576 DAG size of output: 32 [2021-02-23 13:34:29,746 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 13:34:29,747 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 13:34:29,747 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 13:34:29,747 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:29,747 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 13:34:29,747 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:29,748 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:29,748 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 13:34:29,748 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 13:34:29,748 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:29,748 INFO L189 CegarLoopUtils]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,748 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 123) no Hoare annotation was computed. [2021-02-23 13:34:29,748 INFO L189 CegarLoopUtils]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,748 INFO L189 CegarLoopUtils]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,748 INFO L189 CegarLoopUtils]: For program point L94(line 94) no Hoare annotation was computed. [2021-02-23 13:34:29,748 INFO L189 CegarLoopUtils]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,749 INFO L192 CegarLoopUtils]: At program point L119(lines 7 123) the Hoare annotation is: true [2021-02-23 13:34:29,749 INFO L189 CegarLoopUtils]: For program point L53(lines 53 55) no Hoare annotation was computed. [2021-02-23 13:34:29,749 INFO L189 CegarLoopUtils]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,749 INFO L189 CegarLoopUtils]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,749 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 123) no Hoare annotation was computed. [2021-02-23 13:34:29,749 INFO L189 CegarLoopUtils]: For program point L104(line 104) no Hoare annotation was computed. [2021-02-23 13:34:29,749 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 121) no Hoare annotation was computed. [2021-02-23 13:34:29,749 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 123) the Hoare annotation is: true [2021-02-23 13:34:29,750 INFO L189 CegarLoopUtils]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,751 INFO L192 CegarLoopUtils]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2021-02-23 13:34:29,751 INFO L189 CegarLoopUtils]: For program point L89(line 89) no Hoare annotation was computed. [2021-02-23 13:34:29,751 INFO L189 CegarLoopUtils]: For program point L114(line 114) no Hoare annotation was computed. [2021-02-23 13:34:29,751 INFO L185 CegarLoopUtils]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2021-02-23 13:34:29,751 INFO L189 CegarLoopUtils]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,751 INFO L189 CegarLoopUtils]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,751 INFO L189 CegarLoopUtils]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,751 INFO L189 CegarLoopUtils]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,751 INFO L189 CegarLoopUtils]: For program point L99(line 99) no Hoare annotation was computed. [2021-02-23 13:34:29,752 INFO L189 CegarLoopUtils]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,752 INFO L189 CegarLoopUtils]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2021-02-23 13:34:29,752 INFO L189 CegarLoopUtils]: For program point L34(lines 34 36) no Hoare annotation was computed. [2021-02-23 13:34:29,752 INFO L189 CegarLoopUtils]: For program point L84(line 84) no Hoare annotation was computed. [2021-02-23 13:34:29,752 INFO L189 CegarLoopUtils]: For program point L109(line 109) no Hoare annotation was computed. [2021-02-23 13:34:29,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:34:29 BoogieIcfgContainer [2021-02-23 13:34:29,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:34:29,766 INFO L168 Benchmark]: Toolchain (without parser) took 8359.37 ms. Allocated memory was 160.4 MB in the beginning and 282.1 MB in the end (delta: 121.6 MB). Free memory was 136.5 MB in the beginning and 165.7 MB in the end (delta: -29.2 MB). Peak memory consumption was 160.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:29,766 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 160.4 MB. Free memory was 131.4 MB in the beginning and 131.3 MB in the end (delta: 96.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:34:29,767 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.02 ms. Allocated memory is still 160.4 MB. Free memory was 135.4 MB in the beginning and 125.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:29,768 INFO L168 Benchmark]: Boogie Preprocessor took 40.14 ms. Allocated memory is still 160.4 MB. Free memory was 125.5 MB in the beginning and 123.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:29,768 INFO L168 Benchmark]: RCFGBuilder took 470.27 ms. Allocated memory is still 160.4 MB. Free memory was 123.7 MB in the beginning and 141.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:29,769 INFO L168 Benchmark]: TraceAbstraction took 7559.17 ms. Allocated memory was 160.4 MB in the beginning and 282.1 MB in the end (delta: 121.6 MB). Free memory was 141.1 MB in the beginning and 165.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 165.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:29,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 160.4 MB. Free memory was 131.4 MB in the beginning and 131.3 MB in the end (delta: 96.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.02 ms. Allocated memory is still 160.4 MB. Free memory was 135.4 MB in the beginning and 125.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.14 ms. Allocated memory is still 160.4 MB. Free memory was 125.5 MB in the beginning and 123.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 470.27 ms. Allocated memory is still 160.4 MB. Free memory was 123.7 MB in the beginning and 141.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7559.17 ms. Allocated memory was 160.4 MB in the beginning and 282.1 MB in the end (delta: 121.6 MB). Free memory was 141.1 MB in the beginning and 165.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 165.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 121]: 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: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1187 SDtfs, 1693 SDslu, 118 SDs, 0 SdLazy, 868 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2057occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 19 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 854054 FormulaSimplificationTreeSizeReduction, 2.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 384 ConstructedInterpolants, 0 QuantifiedInterpolants, 25738 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 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...