/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:39:00,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:39:00,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:39:00,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:39:00,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:39:00,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:39:00,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:39:00,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:39:00,964 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:39:00,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:39:00,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:39:00,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:39:00,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:39:00,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:39:00,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:39:00,966 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:39:00,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:39:00,966 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:39:00,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:39:00,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:39:00,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:39:00,967 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:39:00,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:39:00,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:39:00,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:39:00,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:39:00,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:39:00,968 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:39:00,968 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:39:01,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:39:01,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:39:01,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:39:01,331 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:39:01,331 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:39:01,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c [2021-05-02 23:39:01,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e5b8d5c3/f5eebe0835814d83990939db03d10729/FLAG03f825019 [2021-05-02 23:39:01,830 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:39:01,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c [2021-05-02 23:39:01,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e5b8d5c3/f5eebe0835814d83990939db03d10729/FLAG03f825019 [2021-05-02 23:39:02,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e5b8d5c3/f5eebe0835814d83990939db03d10729 [2021-05-02 23:39:02,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:39:02,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:39:02,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:39:02,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:39:02,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:39:02,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:39:02" (1/1) ... [2021-05-02 23:39:02,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36cbe30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02, skipping insertion in model container [2021-05-02 23:39:02,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:39:02" (1/1) ... [2021-05-02 23:39:02,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:39:02,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:39:02,482 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c[6448,6461] [2021-05-02 23:39:02,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:39:02,567 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:39:02,630 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c[6448,6461] [2021-05-02 23:39:02,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:39:02,690 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:39:02,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02 WrapperNode [2021-05-02 23:39:02,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:39:02,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:39:02,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:39:02,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:39:02,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02" (1/1) ... [2021-05-02 23:39:02,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02" (1/1) ... [2021-05-02 23:39:02,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02" (1/1) ... [2021-05-02 23:39:02,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02" (1/1) ... [2021-05-02 23:39:02,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02" (1/1) ... [2021-05-02 23:39:02,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02" (1/1) ... [2021-05-02 23:39:02,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02" (1/1) ... [2021-05-02 23:39:02,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:39:02,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:39:02,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:39:02,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:39:02,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02" (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 [2021-05-02 23:39:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:39:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:39:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:39:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:39:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:39:02,910 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:39:02,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:39:02,910 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:39:02,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:39:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:39:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:39:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:39:02,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:39:02,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:39:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:39:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:39:02,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:39:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:39:02,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:39:03,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:39:03,749 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-02 23:39:03,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:39:03 BoogieIcfgContainer [2021-05-02 23:39:03,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:39:03,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:39:03,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:39:03,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:39:03,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:39:02" (1/3) ... [2021-05-02 23:39:03,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fe5c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:39:03, skipping insertion in model container [2021-05-02 23:39:03,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:39:02" (2/3) ... [2021-05-02 23:39:03,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fe5c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:39:03, skipping insertion in model container [2021-05-02 23:39:03,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:39:03" (3/3) ... [2021-05-02 23:39:03,756 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+nlh-reducer.c [2021-05-02 23:39:03,763 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:39:03,766 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:39:03,778 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:39:03,792 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:39:03,792 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:39:03,792 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:39:03,792 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:39:03,792 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:39:03,792 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:39:03,792 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:39:03,792 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:39:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 143 states have (on average 1.965034965034965) internal successors, (281), 144 states have internal predecessors, (281), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:39:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:03,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:03,833 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:03,833 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash -226504135, now seen corresponding path program 1 times [2021-05-02 23:39:03,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:03,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446391476] [2021-05-02 23:39:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:03,886 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:04,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:04,155 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:04,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446391476] [2021-05-02 23:39:04,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [446391476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:04,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:04,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:39:04,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856255322] [2021-05-02 23:39:04,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:39:04,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:04,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:39:04,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:39:04,177 INFO L87 Difference]: Start difference. First operand has 149 states, 143 states have (on average 1.965034965034965) internal successors, (281), 144 states have internal predecessors, (281), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:05,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:05,081 INFO L93 Difference]: Finished difference Result 292 states and 562 transitions. [2021-05-02 23:39:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:39:05,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:05,093 INFO L225 Difference]: With dead ends: 292 [2021-05-02 23:39:05,093 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 23:39:05,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:39:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 23:39:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 23:39:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.475177304964539) internal successors, (208), 141 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2021-05-02 23:39:05,157 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 143 [2021-05-02 23:39:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:05,157 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2021-05-02 23:39:05,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2021-05-02 23:39:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:05,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:05,168 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:05,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:39:05,169 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1788930742, now seen corresponding path program 1 times [2021-05-02 23:39:05,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:05,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556331378] [2021-05-02 23:39:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:05,175 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:05,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:05,300 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:05,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556331378] [2021-05-02 23:39:05,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [556331378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:05,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:05,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:39:05,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390543432] [2021-05-02 23:39:05,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:39:05,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:05,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:39:05,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:39:05,302 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:06,054 INFO L93 Difference]: Finished difference Result 406 states and 602 transitions. [2021-05-02 23:39:06,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:39:06,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:06,077 INFO L225 Difference]: With dead ends: 406 [2021-05-02 23:39:06,077 INFO L226 Difference]: Without dead ends: 275 [2021-05-02 23:39:06,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:39:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-05-02 23:39:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2021-05-02 23:39:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 271 states have (on average 1.2509225092250922) internal successors, (339), 271 states have internal predecessors, (339), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 342 transitions. [2021-05-02 23:39:06,136 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 342 transitions. Word has length 143 [2021-05-02 23:39:06,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:06,138 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 342 transitions. [2021-05-02 23:39:06,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 342 transitions. [2021-05-02 23:39:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:06,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:06,141 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:06,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:39:06,141 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash 245018630, now seen corresponding path program 1 times [2021-05-02 23:39:06,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:06,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401683083] [2021-05-02 23:39:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:06,147 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:06,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:06,333 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:06,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401683083] [2021-05-02 23:39:06,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [401683083] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:06,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:06,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:39:06,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72718154] [2021-05-02 23:39:06,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:39:06,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:06,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:39:06,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:39:06,346 INFO L87 Difference]: Start difference. First operand 275 states and 342 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:06,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:06,847 INFO L93 Difference]: Finished difference Result 406 states and 473 transitions. [2021-05-02 23:39:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:39:06,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:06,852 INFO L225 Difference]: With dead ends: 406 [2021-05-02 23:39:06,852 INFO L226 Difference]: Without dead ends: 273 [2021-05-02 23:39:06,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:39:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-05-02 23:39:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-05-02 23:39:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 269 states have (on average 1.2490706319702602) internal successors, (336), 269 states have internal predecessors, (336), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 339 transitions. [2021-05-02 23:39:06,904 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 339 transitions. Word has length 143 [2021-05-02 23:39:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:06,904 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 339 transitions. [2021-05-02 23:39:06,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 339 transitions. [2021-05-02 23:39:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:06,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:06,905 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:06,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:39:06,906 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1669664994, now seen corresponding path program 1 times [2021-05-02 23:39:06,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:06,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935719944] [2021-05-02 23:39:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:06,909 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:07,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:07,052 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:07,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935719944] [2021-05-02 23:39:07,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [935719944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:07,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:07,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:39:07,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285234895] [2021-05-02 23:39:07,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:39:07,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:39:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:39:07,054 INFO L87 Difference]: Start difference. First operand 273 states and 339 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:07,459 INFO L93 Difference]: Finished difference Result 400 states and 466 transitions. [2021-05-02 23:39:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:39:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:07,461 INFO L225 Difference]: With dead ends: 400 [2021-05-02 23:39:07,461 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 23:39:07,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:39:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 23:39:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-05-02 23:39:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 265 states have (on average 1.2452830188679245) internal successors, (330), 265 states have internal predecessors, (330), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2021-05-02 23:39:07,507 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 143 [2021-05-02 23:39:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:07,507 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2021-05-02 23:39:07,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2021-05-02 23:39:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:07,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:07,509 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:07,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:39:07,509 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:07,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1509197206, now seen corresponding path program 1 times [2021-05-02 23:39:07,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:07,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657785915] [2021-05-02 23:39:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:07,518 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:07,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:07,656 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:07,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657785915] [2021-05-02 23:39:07,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657785915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:07,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:07,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:39:07,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024131120] [2021-05-02 23:39:07,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:39:07,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:07,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:39:07,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:39:07,658 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:08,220 INFO L93 Difference]: Finished difference Result 392 states and 456 transitions. [2021-05-02 23:39:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:39:08,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:08,223 INFO L225 Difference]: With dead ends: 392 [2021-05-02 23:39:08,223 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 23:39:08,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:39:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 23:39:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2021-05-02 23:39:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 261 states have (on average 1.2413793103448276) internal successors, (324), 261 states have internal predecessors, (324), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 327 transitions. [2021-05-02 23:39:08,246 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 327 transitions. Word has length 143 [2021-05-02 23:39:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:08,247 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 327 transitions. [2021-05-02 23:39:08,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 327 transitions. [2021-05-02 23:39:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:08,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:08,248 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:08,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:39:08,248 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1430239655, now seen corresponding path program 1 times [2021-05-02 23:39:08,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:08,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897037272] [2021-05-02 23:39:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:08,251 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:08,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:08,380 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897037272] [2021-05-02 23:39:08,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [897037272] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:08,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:08,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:39:08,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298608265] [2021-05-02 23:39:08,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:39:08,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:08,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:39:08,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:39:08,384 INFO L87 Difference]: Start difference. First operand 265 states and 327 transitions. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:08,952 INFO L93 Difference]: Finished difference Result 382 states and 444 transitions. [2021-05-02 23:39:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:39:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:08,954 INFO L225 Difference]: With dead ends: 382 [2021-05-02 23:39:08,954 INFO L226 Difference]: Without dead ends: 259 [2021-05-02 23:39:08,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:39:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-02 23:39:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-05-02 23:39:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 255 states have (on average 1.2352941176470589) internal successors, (315), 255 states have internal predecessors, (315), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 318 transitions. [2021-05-02 23:39:08,971 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 318 transitions. Word has length 143 [2021-05-02 23:39:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:08,971 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 318 transitions. [2021-05-02 23:39:08,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 318 transitions. [2021-05-02 23:39:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:08,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:08,973 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:08,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:39:08,973 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:08,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1823886761, now seen corresponding path program 1 times [2021-05-02 23:39:08,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:08,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149473119] [2021-05-02 23:39:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:08,975 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:09,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:09,121 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:09,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149473119] [2021-05-02 23:39:09,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [149473119] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:09,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:09,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:39:09,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216561442] [2021-05-02 23:39:09,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:39:09,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:09,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:39:09,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:39:09,123 INFO L87 Difference]: Start difference. First operand 259 states and 318 transitions. Second operand has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:10,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:10,382 INFO L93 Difference]: Finished difference Result 372 states and 431 transitions. [2021-05-02 23:39:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:39:10,383 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:10,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:10,384 INFO L225 Difference]: With dead ends: 372 [2021-05-02 23:39:10,384 INFO L226 Difference]: Without dead ends: 255 [2021-05-02 23:39:10,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:39:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-02 23:39:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2021-05-02 23:39:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.2310756972111554) internal successors, (309), 251 states have internal predecessors, (309), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 312 transitions. [2021-05-02 23:39:10,408 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 312 transitions. Word has length 143 [2021-05-02 23:39:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:10,409 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 312 transitions. [2021-05-02 23:39:10,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 312 transitions. [2021-05-02 23:39:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:10,410 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:10,410 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:10,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:39:10,411 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:10,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1370409666, now seen corresponding path program 1 times [2021-05-02 23:39:10,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:10,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415195402] [2021-05-02 23:39:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:10,414 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:10,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:10,571 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:10,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415195402] [2021-05-02 23:39:10,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [415195402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:10,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:10,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:39:10,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944871203] [2021-05-02 23:39:10,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:39:10,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:10,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:39:10,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:39:10,573 INFO L87 Difference]: Start difference. First operand 255 states and 312 transitions. Second operand has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:11,932 INFO L93 Difference]: Finished difference Result 366 states and 423 transitions. [2021-05-02 23:39:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:39:11,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:11,934 INFO L225 Difference]: With dead ends: 366 [2021-05-02 23:39:11,934 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 23:39:11,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:39:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 23:39:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-05-02 23:39:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 249 states have (on average 1.2289156626506024) internal successors, (306), 249 states have internal predecessors, (306), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 309 transitions. [2021-05-02 23:39:11,951 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 309 transitions. Word has length 143 [2021-05-02 23:39:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:11,951 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 309 transitions. [2021-05-02 23:39:11,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 309 transitions. [2021-05-02 23:39:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:11,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:11,952 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:11,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:39:11,952 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1524671279, now seen corresponding path program 1 times [2021-05-02 23:39:11,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:11,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178349771] [2021-05-02 23:39:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:11,955 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:12,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:12,142 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:12,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178349771] [2021-05-02 23:39:12,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [178349771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:12,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:12,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:39:12,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913545321] [2021-05-02 23:39:12,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:39:12,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:12,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:39:12,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:39:12,144 INFO L87 Difference]: Start difference. First operand 253 states and 309 transitions. Second operand has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:13,506 INFO L93 Difference]: Finished difference Result 362 states and 418 transitions. [2021-05-02 23:39:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:39:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:13,508 INFO L225 Difference]: With dead ends: 362 [2021-05-02 23:39:13,508 INFO L226 Difference]: Without dead ends: 251 [2021-05-02 23:39:13,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:39:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-02 23:39:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-05-02 23:39:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.2267206477732793) internal successors, (303), 247 states have internal predecessors, (303), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 306 transitions. [2021-05-02 23:39:13,525 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 306 transitions. Word has length 143 [2021-05-02 23:39:13,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:13,525 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 306 transitions. [2021-05-02 23:39:13,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:13,526 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 306 transitions. [2021-05-02 23:39:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:13,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:13,527 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:13,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:39:13,527 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash 512357033, now seen corresponding path program 1 times [2021-05-02 23:39:13,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:13,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042400092] [2021-05-02 23:39:13,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:13,529 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:13,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:13,761 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:13,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042400092] [2021-05-02 23:39:13,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042400092] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:13,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:13,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:39:13,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992586839] [2021-05-02 23:39:13,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:39:13,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:13,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:39:13,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:39:13,763 INFO L87 Difference]: Start difference. First operand 251 states and 306 transitions. Second operand has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 20 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:15,440 INFO L93 Difference]: Finished difference Result 352 states and 407 transitions. [2021-05-02 23:39:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:39:15,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 20 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:15,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:15,442 INFO L225 Difference]: With dead ends: 352 [2021-05-02 23:39:15,442 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 23:39:15,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:39:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 23:39:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2021-05-02 23:39:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 239 states have (on average 1.217573221757322) internal successors, (291), 239 states have internal predecessors, (291), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 294 transitions. [2021-05-02 23:39:15,458 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 294 transitions. Word has length 143 [2021-05-02 23:39:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:15,458 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 294 transitions. [2021-05-02 23:39:15,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 20 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 294 transitions. [2021-05-02 23:39:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:15,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:15,460 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:15,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:39:15,460 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1151655290, now seen corresponding path program 1 times [2021-05-02 23:39:15,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:15,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821433250] [2021-05-02 23:39:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:15,462 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:15,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:15,693 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:15,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821433250] [2021-05-02 23:39:15,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821433250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:15,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:15,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:39:15,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485849187] [2021-05-02 23:39:15,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:39:15,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:15,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:39:15,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:39:15,695 INFO L87 Difference]: Start difference. First operand 243 states and 294 transitions. Second operand has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 21 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:17,409 INFO L93 Difference]: Finished difference Result 342 states and 393 transitions. [2021-05-02 23:39:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:39:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 21 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:17,412 INFO L225 Difference]: With dead ends: 342 [2021-05-02 23:39:17,412 INFO L226 Difference]: Without dead ends: 241 [2021-05-02 23:39:17,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 697.1ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:39:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-02 23:39:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-05-02 23:39:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 237 states have (on average 1.2151898734177216) internal successors, (288), 237 states have internal predecessors, (288), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 291 transitions. [2021-05-02 23:39:17,428 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 291 transitions. Word has length 143 [2021-05-02 23:39:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:17,428 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 291 transitions. [2021-05-02 23:39:17,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 21 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 291 transitions. [2021-05-02 23:39:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:17,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:17,429 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:17,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:39:17,429 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:17,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2019048926, now seen corresponding path program 1 times [2021-05-02 23:39:17,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:17,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768100489] [2021-05-02 23:39:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:17,432 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:17,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:17,690 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:17,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768100489] [2021-05-02 23:39:17,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [768100489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:17,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:17,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:39:17,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91868696] [2021-05-02 23:39:17,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:39:17,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:17,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:39:17,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:39:17,691 INFO L87 Difference]: Start difference. First operand 241 states and 291 transitions. Second operand has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 23 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:19,244 INFO L93 Difference]: Finished difference Result 336 states and 386 transitions. [2021-05-02 23:39:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:39:19,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 23 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:19,246 INFO L225 Difference]: With dead ends: 336 [2021-05-02 23:39:19,246 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 23:39:19,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 799.6ms TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:39:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 23:39:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-05-02 23:39:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 233 states have (on average 1.2103004291845494) internal successors, (282), 233 states have internal predecessors, (282), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 285 transitions. [2021-05-02 23:39:19,261 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 285 transitions. Word has length 143 [2021-05-02 23:39:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:19,261 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 285 transitions. [2021-05-02 23:39:19,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 23 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 285 transitions. [2021-05-02 23:39:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:19,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:19,262 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:19,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:39:19,262 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash -642501226, now seen corresponding path program 1 times [2021-05-02 23:39:19,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:19,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350544398] [2021-05-02 23:39:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:19,264 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:19,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:19,570 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:19,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350544398] [2021-05-02 23:39:19,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [350544398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:19,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:19,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:39:19,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483943182] [2021-05-02 23:39:19,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:39:19,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:39:19,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:39:19,572 INFO L87 Difference]: Start difference. First operand 237 states and 285 transitions. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:21,288 INFO L93 Difference]: Finished difference Result 328 states and 376 transitions. [2021-05-02 23:39:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:39:21,288 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:21,290 INFO L225 Difference]: With dead ends: 328 [2021-05-02 23:39:21,290 INFO L226 Difference]: Without dead ends: 233 [2021-05-02 23:39:21,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:39:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-02 23:39:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-05-02 23:39:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.205240174672489) internal successors, (276), 229 states have internal predecessors, (276), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 279 transitions. [2021-05-02 23:39:21,306 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 279 transitions. Word has length 143 [2021-05-02 23:39:21,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:21,306 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 279 transitions. [2021-05-02 23:39:21,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:21,306 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 279 transitions. [2021-05-02 23:39:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:21,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:21,307 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:21,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:39:21,307 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:21,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:21,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1746101127, now seen corresponding path program 1 times [2021-05-02 23:39:21,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:21,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867435231] [2021-05-02 23:39:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:21,310 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:21,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:21,693 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867435231] [2021-05-02 23:39:21,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [867435231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:21,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:21,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:39:21,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220279600] [2021-05-02 23:39:21,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:39:21,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:21,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:39:21,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:39:21,694 INFO L87 Difference]: Start difference. First operand 233 states and 279 transitions. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 28 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:24,126 INFO L93 Difference]: Finished difference Result 318 states and 364 transitions. [2021-05-02 23:39:24,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:39:24,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 28 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:24,130 INFO L225 Difference]: With dead ends: 318 [2021-05-02 23:39:24,130 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 23:39:24,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1159.4ms TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:39:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 23:39:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-05-02 23:39:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 223 states have (on average 1.1973094170403586) internal successors, (267), 223 states have internal predecessors, (267), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2021-05-02 23:39:24,151 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 143 [2021-05-02 23:39:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:24,151 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2021-05-02 23:39:24,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 28 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2021-05-02 23:39:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:24,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:24,152 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:24,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:39:24,152 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:24,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:24,153 INFO L82 PathProgramCache]: Analyzing trace with hash 297304713, now seen corresponding path program 1 times [2021-05-02 23:39:24,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:24,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575524099] [2021-05-02 23:39:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:24,155 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:24,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:24,610 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:24,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575524099] [2021-05-02 23:39:24,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [575524099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:24,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:24,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:39:24,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501705384] [2021-05-02 23:39:24,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:39:24,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:24,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:39:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:39:24,612 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 30 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:27,116 INFO L93 Difference]: Finished difference Result 308 states and 351 transitions. [2021-05-02 23:39:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:39:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 30 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:27,118 INFO L225 Difference]: With dead ends: 308 [2021-05-02 23:39:27,118 INFO L226 Difference]: Without dead ends: 223 [2021-05-02 23:39:27,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1422.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:39:27,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-02 23:39:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-05-02 23:39:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 219 states have (on average 1.1917808219178083) internal successors, (261), 219 states have internal predecessors, (261), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2021-05-02 23:39:27,132 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 143 [2021-05-02 23:39:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:27,132 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2021-05-02 23:39:27,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 30 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2021-05-02 23:39:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:27,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:27,134 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:27,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:39:27,134 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:27,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2017851138, now seen corresponding path program 1 times [2021-05-02 23:39:27,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:27,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924332436] [2021-05-02 23:39:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:27,136 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:27,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:27,586 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:27,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924332436] [2021-05-02 23:39:27,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [924332436] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:27,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:27,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:39:27,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322335520] [2021-05-02 23:39:27,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:39:27,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:27,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:39:27,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:39:27,588 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand has 32 states, 32 states have (on average 4.375) internal successors, (140), 31 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:30,202 INFO L93 Difference]: Finished difference Result 302 states and 343 transitions. [2021-05-02 23:39:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:39:30,203 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.375) internal successors, (140), 31 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:30,204 INFO L225 Difference]: With dead ends: 302 [2021-05-02 23:39:30,204 INFO L226 Difference]: Without dead ends: 221 [2021-05-02 23:39:30,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1437.3ms TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:39:30,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-02 23:39:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-05-02 23:39:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.1889400921658986) internal successors, (258), 217 states have internal predecessors, (258), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2021-05-02 23:39:30,221 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 143 [2021-05-02 23:39:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:30,221 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2021-05-02 23:39:30,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 4.375) internal successors, (140), 31 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2021-05-02 23:39:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:30,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:30,222 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:30,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:39:30,222 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1981140879, now seen corresponding path program 1 times [2021-05-02 23:39:30,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:30,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563987253] [2021-05-02 23:39:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:30,225 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:30,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:30,756 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:30,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563987253] [2021-05-02 23:39:30,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563987253] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:30,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:30,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:39:30,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652752127] [2021-05-02 23:39:30,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:39:30,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:30,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:39:30,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:39:30,758 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 32 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:32,846 INFO L93 Difference]: Finished difference Result 298 states and 338 transitions. [2021-05-02 23:39:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:39:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 32 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:32,848 INFO L225 Difference]: With dead ends: 298 [2021-05-02 23:39:32,848 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 23:39:32,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1597.9ms TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:39:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 23:39:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-05-02 23:39:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 215 states have (on average 1.186046511627907) internal successors, (255), 215 states have internal predecessors, (255), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 258 transitions. [2021-05-02 23:39:32,861 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 258 transitions. Word has length 143 [2021-05-02 23:39:32,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:32,862 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 258 transitions. [2021-05-02 23:39:32,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 32 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 258 transitions. [2021-05-02 23:39:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:32,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:32,863 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:32,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:39:32,863 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:32,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:32,863 INFO L82 PathProgramCache]: Analyzing trace with hash -553761847, now seen corresponding path program 1 times [2021-05-02 23:39:32,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:32,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974440527] [2021-05-02 23:39:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:32,865 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:33,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:33,458 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:33,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974440527] [2021-05-02 23:39:33,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974440527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:33,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:33,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:39:33,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199654184] [2021-05-02 23:39:33,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:39:33,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:33,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:39:33,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:39:33,460 INFO L87 Difference]: Start difference. First operand 219 states and 258 transitions. Second operand has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:36,488 INFO L93 Difference]: Finished difference Result 288 states and 327 transitions. [2021-05-02 23:39:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:39:36,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:36,490 INFO L225 Difference]: With dead ends: 288 [2021-05-02 23:39:36,490 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 23:39:36,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1770.5ms TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:39:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 23:39:36,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-05-02 23:39:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 207 states have (on average 1.173913043478261) internal successors, (243), 207 states have internal predecessors, (243), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 246 transitions. [2021-05-02 23:39:36,504 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 246 transitions. Word has length 143 [2021-05-02 23:39:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:36,504 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 246 transitions. [2021-05-02 23:39:36,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 246 transitions. [2021-05-02 23:39:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:36,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:36,505 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:36,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:39:36,505 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:36,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:36,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1427802886, now seen corresponding path program 1 times [2021-05-02 23:39:36,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:36,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657077796] [2021-05-02 23:39:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:36,507 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:37,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:37,051 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:37,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657077796] [2021-05-02 23:39:37,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [657077796] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:37,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:37,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:39:37,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091744448] [2021-05-02 23:39:37,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:39:37,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:37,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:39:37,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:39:37,053 INFO L87 Difference]: Start difference. First operand 211 states and 246 transitions. Second operand has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 37 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:39,102 INFO L93 Difference]: Finished difference Result 278 states and 313 transitions. [2021-05-02 23:39:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:39:39,102 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 37 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:39,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:39,103 INFO L225 Difference]: With dead ends: 278 [2021-05-02 23:39:39,103 INFO L226 Difference]: Without dead ends: 209 [2021-05-02 23:39:39,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1689.6ms TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:39:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-02 23:39:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-05-02 23:39:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 205 states have (on average 1.170731707317073) internal successors, (240), 205 states have internal predecessors, (240), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 243 transitions. [2021-05-02 23:39:39,117 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 243 transitions. Word has length 143 [2021-05-02 23:39:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:39,117 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 243 transitions. [2021-05-02 23:39:39,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 37 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 243 transitions. [2021-05-02 23:39:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:39,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:39,118 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:39,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:39:39,118 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1201706654, now seen corresponding path program 1 times [2021-05-02 23:39:39,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:39,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859031286] [2021-05-02 23:39:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:39,120 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:39,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:39,715 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:39,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859031286] [2021-05-02 23:39:39,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1859031286] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:39,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:39,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:39:39,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278522350] [2021-05-02 23:39:39,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:39:39,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:39,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:39:39,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:39:39,717 INFO L87 Difference]: Start difference. First operand 209 states and 243 transitions. Second operand has 40 states, 40 states have (on average 3.5) internal successors, (140), 39 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:41,872 INFO L93 Difference]: Finished difference Result 272 states and 306 transitions. [2021-05-02 23:39:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:39:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.5) internal successors, (140), 39 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:41,874 INFO L225 Difference]: With dead ends: 272 [2021-05-02 23:39:41,874 INFO L226 Difference]: Without dead ends: 205 [2021-05-02 23:39:41,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1850.1ms TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:39:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-02 23:39:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-05-02 23:39:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 201 states have (on average 1.164179104477612) internal successors, (234), 201 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 237 transitions. [2021-05-02 23:39:41,886 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 237 transitions. Word has length 143 [2021-05-02 23:39:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:41,886 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 237 transitions. [2021-05-02 23:39:41,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 3.5) internal successors, (140), 39 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 237 transitions. [2021-05-02 23:39:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:41,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:41,887 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:41,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:39:41,887 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:41,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1310645142, now seen corresponding path program 1 times [2021-05-02 23:39:41,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:41,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225362124] [2021-05-02 23:39:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:41,889 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:42,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:42,532 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225362124] [2021-05-02 23:39:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [225362124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:42,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:42,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:39:42,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308361106] [2021-05-02 23:39:42,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:39:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:39:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:39:42,534 INFO L87 Difference]: Start difference. First operand 205 states and 237 transitions. Second operand has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 41 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:45,726 INFO L93 Difference]: Finished difference Result 264 states and 296 transitions. [2021-05-02 23:39:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:39:45,726 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 41 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:45,728 INFO L225 Difference]: With dead ends: 264 [2021-05-02 23:39:45,728 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 23:39:45,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2026.6ms TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:39:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 23:39:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-05-02 23:39:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.1573604060913705) internal successors, (228), 197 states have internal predecessors, (228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 231 transitions. [2021-05-02 23:39:45,741 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 231 transitions. Word has length 143 [2021-05-02 23:39:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:45,741 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 231 transitions. [2021-05-02 23:39:45,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 41 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 231 transitions. [2021-05-02 23:39:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:45,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:45,742 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:45,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:39:45,742 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash -573249383, now seen corresponding path program 1 times [2021-05-02 23:39:45,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:45,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730487461] [2021-05-02 23:39:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:45,744 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:46,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:46,461 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:46,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730487461] [2021-05-02 23:39:46,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730487461] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:46,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:46,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:39:46,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115367889] [2021-05-02 23:39:46,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:39:46,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:46,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:39:46,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:39:46,464 INFO L87 Difference]: Start difference. First operand 201 states and 231 transitions. Second operand has 45 states, 45 states have (on average 3.111111111111111) internal successors, (140), 44 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:49,401 INFO L93 Difference]: Finished difference Result 254 states and 284 transitions. [2021-05-02 23:39:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:39:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.111111111111111) internal successors, (140), 44 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:49,403 INFO L225 Difference]: With dead ends: 254 [2021-05-02 23:39:49,403 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 23:39:49,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2298.6ms TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:39:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 23:39:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-05-02 23:39:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.1465968586387434) internal successors, (219), 191 states have internal predecessors, (219), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 222 transitions. [2021-05-02 23:39:49,418 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 222 transitions. Word has length 143 [2021-05-02 23:39:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:49,418 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 222 transitions. [2021-05-02 23:39:49,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 3.111111111111111) internal successors, (140), 44 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 222 transitions. [2021-05-02 23:39:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:49,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:49,419 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:49,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:39:49,420 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash 214740329, now seen corresponding path program 1 times [2021-05-02 23:39:49,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:49,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571563349] [2021-05-02 23:39:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:49,422 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:50,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:50,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:50,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571563349] [2021-05-02 23:39:50,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [571563349] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:50,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:50,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:39:50,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313378396] [2021-05-02 23:39:50,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:39:50,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:39:50,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:39:50,235 INFO L87 Difference]: Start difference. First operand 195 states and 222 transitions. Second operand has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:53,538 INFO L93 Difference]: Finished difference Result 244 states and 271 transitions. [2021-05-02 23:39:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:39:53,539 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:53,540 INFO L225 Difference]: With dead ends: 244 [2021-05-02 23:39:53,540 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 23:39:53,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2478.8ms TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:39:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 23:39:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-02 23:39:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2021-05-02 23:39:53,551 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 143 [2021-05-02 23:39:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:53,551 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2021-05-02 23:39:53,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2021-05-02 23:39:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:53,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:53,552 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:53,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:39:53,553 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash -20309694, now seen corresponding path program 1 times [2021-05-02 23:39:53,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:53,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396396076] [2021-05-02 23:39:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:53,554 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:54,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:54,377 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396396076] [2021-05-02 23:39:54,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [396396076] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:54,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:54,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:39:54,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744301551] [2021-05-02 23:39:54,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:39:54,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:54,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:39:54,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:39:54,379 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 48 states, 48 states have (on average 2.9166666666666665) internal successors, (140), 47 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:39:57,237 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2021-05-02 23:39:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:39:57,238 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9166666666666665) internal successors, (140), 47 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:39:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:39:57,239 INFO L225 Difference]: With dead ends: 238 [2021-05-02 23:39:57,239 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 23:39:57,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2561.6ms TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:39:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 23:39:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-05-02 23:39:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 185 states have (on average 1.135135135135135) internal successors, (210), 185 states have internal predecessors, (210), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 213 transitions. [2021-05-02 23:39:57,252 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 213 transitions. Word has length 143 [2021-05-02 23:39:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:39:57,252 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 213 transitions. [2021-05-02 23:39:57,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.9166666666666665) internal successors, (140), 47 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:39:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 213 transitions. [2021-05-02 23:39:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:39:57,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:39:57,253 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:39:57,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:39:57,253 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:39:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:39:57,254 INFO L82 PathProgramCache]: Analyzing trace with hash 178059793, now seen corresponding path program 1 times [2021-05-02 23:39:57,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:39:57,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184504239] [2021-05-02 23:39:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:39:57,257 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:39:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:58,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:39:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:39:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:39:58,251 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:39:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184504239] [2021-05-02 23:39:58,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1184504239] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:39:58,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:39:58,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:39:58,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067123907] [2021-05-02 23:39:58,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:39:58,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:39:58,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:39:58,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:39:58,253 INFO L87 Difference]: Start difference. First operand 189 states and 213 transitions. Second operand has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:01,973 INFO L93 Difference]: Finished difference Result 234 states and 258 transitions. [2021-05-02 23:40:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:40:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:40:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:01,974 INFO L225 Difference]: With dead ends: 234 [2021-05-02 23:40:01,974 INFO L226 Difference]: Without dead ends: 187 [2021-05-02 23:40:01,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2766.2ms TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:40:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-02 23:40:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-05-02 23:40:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 183 states have (on average 1.1311475409836065) internal successors, (207), 183 states have internal predecessors, (207), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2021-05-02 23:40:01,986 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 143 [2021-05-02 23:40:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:01,986 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2021-05-02 23:40:01,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2021-05-02 23:40:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:40:01,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:01,987 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:01,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:40:01,987 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:01,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1601795351, now seen corresponding path program 1 times [2021-05-02 23:40:01,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:01,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935363766] [2021-05-02 23:40:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:01,989 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:40:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:03,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:03,016 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:03,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935363766] [2021-05-02 23:40:03,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935363766] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:03,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:03,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:40:03,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771150416] [2021-05-02 23:40:03,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:40:03,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:03,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:40:03,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:40:03,017 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 52 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:07,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:07,072 INFO L93 Difference]: Finished difference Result 224 states and 247 transitions. [2021-05-02 23:40:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:40:07,073 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 52 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:40:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:07,074 INFO L225 Difference]: With dead ends: 224 [2021-05-02 23:40:07,074 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 23:40:07,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 3107.1ms TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:40:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 23:40:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-05-02 23:40:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.1142857142857143) internal successors, (195), 175 states have internal predecessors, (195), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 198 transitions. [2021-05-02 23:40:07,084 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 198 transitions. Word has length 143 [2021-05-02 23:40:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:07,085 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 198 transitions. [2021-05-02 23:40:07,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 52 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 198 transitions. [2021-05-02 23:40:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 23:40:07,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:07,085 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:07,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:40:07,086 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:07,086 INFO L82 PathProgramCache]: Analyzing trace with hash -964105850, now seen corresponding path program 1 times [2021-05-02 23:40:07,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:07,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267089749] [2021-05-02 23:40:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:07,088 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:40:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:08,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:08,899 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:08,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267089749] [2021-05-02 23:40:08,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [267089749] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:08,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:08,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:40:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808313554] [2021-05-02 23:40:08,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:40:08,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:08,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:40:08,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:40:08,901 INFO L87 Difference]: Start difference. First operand 179 states and 198 transitions. Second operand has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:16,115 INFO L93 Difference]: Finished difference Result 456 states and 491 transitions. [2021-05-02 23:40:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:40:16,116 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2021-05-02 23:40:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:16,118 INFO L225 Difference]: With dead ends: 456 [2021-05-02 23:40:16,118 INFO L226 Difference]: Without dead ends: 453 [2021-05-02 23:40:16,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 5393.4ms TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:40:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-02 23:40:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 452. [2021-05-02 23:40:16,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 448 states have (on average 1.0424107142857142) internal successors, (467), 448 states have internal predecessors, (467), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 470 transitions. [2021-05-02 23:40:16,166 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 470 transitions. Word has length 143 [2021-05-02 23:40:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:16,167 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 470 transitions. [2021-05-02 23:40:16,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 470 transitions. [2021-05-02 23:40:16,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-02 23:40:16,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:16,168 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:16,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:40:16,169 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1199688896, now seen corresponding path program 1 times [2021-05-02 23:40:16,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:16,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591458542] [2021-05-02 23:40:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:16,244 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_411) (< v_main_~main__x~0_411 100)) InVars {main_~main__x~0=v_main_~main__x~0_411} OutVars{main_~main__x~0=v_main_~main__x~0_411} AuxVars[] AssignedVars[] [2021-05-02 23:40:16,293 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:16,298 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:16,320 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:16,349 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:16,354 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:16,393 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:16,425 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:19,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:19,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:19,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:19,311 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:19,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591458542] [2021-05-02 23:40:19,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [591458542] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:19,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:19,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:40:19,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861476587] [2021-05-02 23:40:19,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:40:19,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:40:19,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1645, Invalid=3905, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:40:19,313 INFO L87 Difference]: Start difference. First operand 452 states and 470 transitions. Second operand has 74 states, 74 states have (on average 1.9189189189189189) internal successors, (142), 73 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:27,389 INFO L93 Difference]: Finished difference Result 459 states and 477 transitions. [2021-05-02 23:40:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:40:27,390 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9189189189189189) internal successors, (142), 73 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-05-02 23:40:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:27,392 INFO L225 Difference]: With dead ends: 459 [2021-05-02 23:40:27,392 INFO L226 Difference]: Without dead ends: 456 [2021-05-02 23:40:27,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3502 ImplicationChecksByTransitivity, 7728.6ms TimeCoverageRelationStatistics Valid=4863, Invalid=15729, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:40:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-05-02 23:40:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 422. [2021-05-02 23:40:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 418 states have (on average 1.0454545454545454) internal successors, (437), 418 states have internal predecessors, (437), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 440 transitions. [2021-05-02 23:40:27,426 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 440 transitions. Word has length 145 [2021-05-02 23:40:27,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:27,427 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 440 transitions. [2021-05-02 23:40:27,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.9189189189189189) internal successors, (142), 73 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:27,427 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 440 transitions. [2021-05-02 23:40:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-02 23:40:27,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:27,428 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:27,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:40:27,429 INFO L428 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1842268538, now seen corresponding path program 2 times [2021-05-02 23:40:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:27,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284853623] [2021-05-02 23:40:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:27,439 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_415) (< v_main_~main__x~0_415 100)) InVars {main_~main__x~0=v_main_~main__x~0_415} OutVars{main_~main__x~0=v_main_~main__x~0_415} AuxVars[] AssignedVars[] [2021-05-02 23:40:27,445 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:27,461 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:27,465 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:27,478 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:27,481 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:27,499 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:27,519 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:27,525 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_417 99) (<= 50 v_main_~main__x~0_417)) InVars {main_~main__x~0=v_main_~main__x~0_417} OutVars{main_~main__x~0=v_main_~main__x~0_417} AuxVars[] AssignedVars[] [2021-05-02 23:40:27,530 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:27,544 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:27,549 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:27,563 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:27,566 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:27,580 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:27,596 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:30,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:30,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:30,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:31,086 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:31,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284853623] [2021-05-02 23:40:31,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [284853623] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:31,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:31,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:40:31,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564324747] [2021-05-02 23:40:31,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:40:31,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:31,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:40:31,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5481, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:40:31,088 INFO L87 Difference]: Start difference. First operand 422 states and 440 transitions. Second operand has 75 states, 75 states have (on average 1.92) internal successors, (144), 74 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:41,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:41,725 INFO L93 Difference]: Finished difference Result 461 states and 479 transitions. [2021-05-02 23:40:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:40:41,726 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.92) internal successors, (144), 74 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-05-02 23:40:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:41,728 INFO L225 Difference]: With dead ends: 461 [2021-05-02 23:40:41,728 INFO L226 Difference]: Without dead ends: 458 [2021-05-02 23:40:41,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 8302.9ms TimeCoverageRelationStatistics Valid=568, Invalid=20602, Unknown=0, NotChecked=0, Total=21170 [2021-05-02 23:40:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-02 23:40:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 424. [2021-05-02 23:40:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 420 states have (on average 1.0452380952380953) internal successors, (439), 420 states have internal predecessors, (439), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 442 transitions. [2021-05-02 23:40:41,763 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 442 transitions. Word has length 147 [2021-05-02 23:40:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:41,763 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 442 transitions. [2021-05-02 23:40:41,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.92) internal successors, (144), 74 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 442 transitions. [2021-05-02 23:40:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-02 23:40:41,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:41,765 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:41,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:40:41,765 INFO L428 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2082513523, now seen corresponding path program 1 times [2021-05-02 23:40:41,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:41,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724777878] [2021-05-02 23:40:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:41,773 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_422 100) (<= 50 v_main_~main__x~0_422)) InVars {main_~main__x~0=v_main_~main__x~0_422} OutVars{main_~main__x~0=v_main_~main__x~0_422} AuxVars[] AssignedVars[] [2021-05-02 23:40:41,777 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:41,792 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:41,795 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:41,807 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:41,810 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:41,826 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:41,843 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:41,848 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_424) (< v_main_~main__x~0_424 99)) InVars {main_~main__x~0=v_main_~main__x~0_424} OutVars{main_~main__x~0=v_main_~main__x~0_424} AuxVars[] AssignedVars[] [2021-05-02 23:40:41,850 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:41,852 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:41,855 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:41,867 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:41,870 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:41,896 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:41,913 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:43,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:43,216 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724777878] [2021-05-02 23:40:43,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1724777878] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:43,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:43,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:40:43,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042935167] [2021-05-02 23:40:43,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:40:43,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:43,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:40:43,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:40:43,218 INFO L87 Difference]: Start difference. First operand 424 states and 442 transitions. Second operand has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:45,908 INFO L93 Difference]: Finished difference Result 462 states and 480 transitions. [2021-05-02 23:40:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:40:45,909 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-05-02 23:40:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:45,910 INFO L225 Difference]: With dead ends: 462 [2021-05-02 23:40:45,910 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 23:40:45,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3073.1ms TimeCoverageRelationStatistics Valid=3984, Invalid=6936, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:40:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 23:40:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-05-02 23:40:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2021-05-02 23:40:45,931 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2021-05-02 23:40:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:45,931 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2021-05-02 23:40:45,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2021-05-02 23:40:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 23:40:45,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:45,932 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:45,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:40:45,933 INFO L428 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash 886013876, now seen corresponding path program 3 times [2021-05-02 23:40:45,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:45,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524428820] [2021-05-02 23:40:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:45,942 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_427 100) (<= 50 v_main_~main__x~0_427)) InVars {main_~main__x~0=v_main_~main__x~0_427} OutVars{main_~main__x~0=v_main_~main__x~0_427} AuxVars[] AssignedVars[] [2021-05-02 23:40:45,945 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:45,963 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:45,969 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:45,984 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:45,986 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:46,004 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:46,022 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:46,027 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_429 99) (<= 50 v_main_~main__x~0_429)) InVars {main_~main__x~0=v_main_~main__x~0_429} OutVars{main_~main__x~0=v_main_~main__x~0_429} AuxVars[] AssignedVars[] [2021-05-02 23:40:46,031 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:46,033 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:46,038 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:46,054 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:46,057 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:46,103 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:46,123 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:49,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:40:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:40:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:40:49,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:40:49,828 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:40:49,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524428820] [2021-05-02 23:40:49,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [524428820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:40:49,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:40:49,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:40:49,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689072005] [2021-05-02 23:40:49,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:40:49,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:40:49,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:40:49,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:40:49,831 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand has 76 states, 76 states have (on average 1.9210526315789473) internal successors, (146), 75 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:40:59,866 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-05-02 23:40:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:40:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9210526315789473) internal successors, (146), 75 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2021-05-02 23:40:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:40:59,868 INFO L225 Difference]: With dead ends: 156 [2021-05-02 23:40:59,868 INFO L226 Difference]: Without dead ends: 153 [2021-05-02 23:40:59,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 8572.8ms TimeCoverageRelationStatistics Valid=580, Invalid=21176, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 23:40:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-02 23:40:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-05-02 23:40:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2021-05-02 23:40:59,883 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2021-05-02 23:40:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:40:59,884 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2021-05-02 23:40:59,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.9210526315789473) internal successors, (146), 75 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:40:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2021-05-02 23:40:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 23:40:59,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:40:59,885 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:40:59,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:40:59,885 INFO L428 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:40:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:40:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1048285038, now seen corresponding path program 4 times [2021-05-02 23:40:59,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:40:59,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348561768] [2021-05-02 23:40:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:40:59,893 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_435) (< v_main_~main__x~0_435 100)) InVars {main_~main__x~0=v_main_~main__x~0_435} OutVars{main_~main__x~0=v_main_~main__x~0_435} AuxVars[] AssignedVars[] [2021-05-02 23:40:59,895 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:59,896 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:59,898 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:59,907 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:59,908 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:59,929 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:40:59,945 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:40:59,947 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_437 99) (<= 50 v_main_~main__x~0_437)) InVars {main_~main__x~0=v_main_~main__x~0_437} OutVars{main_~main__x~0=v_main_~main__x~0_437} AuxVars[] AssignedVars[] [2021-05-02 23:40:59,951 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:40:59,964 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:59,966 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:40:59,976 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:40:59,979 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:40:59,995 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:00,013 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:03,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:03,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:03,767 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:03,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348561768] [2021-05-02 23:41:03,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [348561768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:03,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:03,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:41:03,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242938520] [2021-05-02 23:41:03,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:41:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:41:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:41:03,769 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand has 77 states, 77 states have (on average 1.922077922077922) internal successors, (148), 76 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:14,886 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-05-02 23:41:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:41:14,887 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.922077922077922) internal successors, (148), 76 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-05-02 23:41:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:14,888 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:41:14,888 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 23:41:14,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 9211.2ms TimeCoverageRelationStatistics Valid=588, Invalid=21762, Unknown=0, NotChecked=0, Total=22350 [2021-05-02 23:41:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 23:41:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-05-02 23:41:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2021-05-02 23:41:14,905 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2021-05-02 23:41:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:14,905 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2021-05-02 23:41:14,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.922077922077922) internal successors, (148), 76 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2021-05-02 23:41:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-02 23:41:14,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:14,906 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:14,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:41:14,906 INFO L428 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:14,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1922918232, now seen corresponding path program 5 times [2021-05-02 23:41:14,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:14,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423794541] [2021-05-02 23:41:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:14,914 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_444) (< v_main_~main__x~0_444 100)) InVars {main_~main__x~0=v_main_~main__x~0_444} OutVars{main_~main__x~0=v_main_~main__x~0_444} AuxVars[] AssignedVars[] [2021-05-02 23:41:14,917 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:14,919 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:14,923 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:14,935 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:14,937 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:14,974 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:14,992 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:14,995 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_446 99) (<= 50 v_main_~main__x~0_446)) InVars {main_~main__x~0=v_main_~main__x~0_446} OutVars{main_~main__x~0=v_main_~main__x~0_446} AuxVars[] AssignedVars[] [2021-05-02 23:41:15,005 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:15,024 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:15,030 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:15,042 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:15,044 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:15,068 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:15,085 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:17,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:17,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:17,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:18,251 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:18,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423794541] [2021-05-02 23:41:18,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1423794541] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:18,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:18,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:41:18,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131408644] [2021-05-02 23:41:18,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:41:18,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:41:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=4505, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:41:18,253 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand has 78 states, 78 states have (on average 1.9230769230769231) internal successors, (150), 77 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:27,756 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-05-02 23:41:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:41:27,757 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9230769230769231) internal successors, (150), 77 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-05-02 23:41:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:27,758 INFO L225 Difference]: With dead ends: 160 [2021-05-02 23:41:27,758 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 23:41:27,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4056 ImplicationChecksByTransitivity, 9544.5ms TimeCoverageRelationStatistics Valid=4963, Invalid=17989, Unknown=0, NotChecked=0, Total=22952 [2021-05-02 23:41:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 23:41:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2021-05-02 23:41:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2021-05-02 23:41:27,775 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2021-05-02 23:41:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:27,775 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2021-05-02 23:41:27,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.9230769230769231) internal successors, (150), 77 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2021-05-02 23:41:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 23:41:27,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:27,776 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:27,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:41:27,776 INFO L428 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1096008862, now seen corresponding path program 6 times [2021-05-02 23:41:27,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:27,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028521383] [2021-05-02 23:41:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:27,784 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_454) (< v_main_~main__x~0_454 100)) InVars {main_~main__x~0=v_main_~main__x~0_454} OutVars{main_~main__x~0=v_main_~main__x~0_454} AuxVars[] AssignedVars[] [2021-05-02 23:41:27,788 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:27,789 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:27,792 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:27,806 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:27,809 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:27,842 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:27,866 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:27,870 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_456) (< v_main_~main__x~0_456 99)) InVars {main_~main__x~0=v_main_~main__x~0_456} OutVars{main_~main__x~0=v_main_~main__x~0_456} AuxVars[] AssignedVars[] [2021-05-02 23:41:27,873 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:27,875 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:27,878 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:27,890 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:27,893 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:27,925 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:27,944 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:31,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:31,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:31,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:32,278 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:32,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028521383] [2021-05-02 23:41:32,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028521383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:32,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:32,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:41:32,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209057782] [2021-05-02 23:41:32,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:41:32,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:32,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:41:32,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:41:32,280 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand has 79 states, 79 states have (on average 1.9240506329113924) internal successors, (152), 78 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:41:44,549 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-05-02 23:41:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:41:44,550 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9240506329113924) internal successors, (152), 78 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-05-02 23:41:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:41:44,551 INFO L225 Difference]: With dead ends: 162 [2021-05-02 23:41:44,551 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 23:41:44,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 10230.1ms TimeCoverageRelationStatistics Valid=604, Invalid=22958, Unknown=0, NotChecked=0, Total=23562 [2021-05-02 23:41:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 23:41:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-05-02 23:41:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2021-05-02 23:41:44,571 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2021-05-02 23:41:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:41:44,571 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2021-05-02 23:41:44,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.9240506329113924) internal successors, (152), 78 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:41:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2021-05-02 23:41:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 23:41:44,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:41:44,572 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:41:44,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:41:44,572 INFO L428 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:41:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:41:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1005054052, now seen corresponding path program 7 times [2021-05-02 23:41:44,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:41:44,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337561110] [2021-05-02 23:41:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:41:44,582 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_465 100) (<= 50 v_main_~main__x~0_465)) InVars {main_~main__x~0=v_main_~main__x~0_465} OutVars{main_~main__x~0=v_main_~main__x~0_465} AuxVars[] AssignedVars[] [2021-05-02 23:41:44,586 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:44,588 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:44,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:44,625 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:44,628 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:44,667 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:44,688 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:44,692 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_467) (< v_main_~main__x~0_467 99)) InVars {main_~main__x~0=v_main_~main__x~0_467} OutVars{main_~main__x~0=v_main_~main__x~0_467} AuxVars[] AssignedVars[] [2021-05-02 23:41:44,695 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:41:44,696 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:44,699 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:41:44,712 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:41:44,715 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:41:44,757 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:41:44,777 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:41:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:48,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:41:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:41:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:41:48,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:41:49,084 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:41:49,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337561110] [2021-05-02 23:41:49,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1337561110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:41:49,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:41:49,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:41:49,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840488956] [2021-05-02 23:41:49,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:41:49,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:41:49,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:41:49,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:41:49,086 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand has 80 states, 80 states have (on average 1.925) internal successors, (154), 79 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:00,473 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-05-02 23:42:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:42:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.925) internal successors, (154), 79 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-05-02 23:42:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:00,474 INFO L225 Difference]: With dead ends: 164 [2021-05-02 23:42:00,475 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 23:42:00,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 9755.4ms TimeCoverageRelationStatistics Valid=612, Invalid=23568, Unknown=0, NotChecked=0, Total=24180 [2021-05-02 23:42:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 23:42:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 23:42:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2021-05-02 23:42:00,490 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2021-05-02 23:42:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:00,491 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2021-05-02 23:42:00,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.925) internal successors, (154), 79 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2021-05-02 23:42:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 23:42:00,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:00,492 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:00,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:42:00,492 INFO L428 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash 503172438, now seen corresponding path program 8 times [2021-05-02 23:42:00,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:00,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398063845] [2021-05-02 23:42:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:00,498 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_477 100) (<= 50 v_main_~main__x~0_477)) InVars {main_~main__x~0=v_main_~main__x~0_477} OutVars{main_~main__x~0=v_main_~main__x~0_477} AuxVars[] AssignedVars[] [2021-05-02 23:42:00,500 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:00,511 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:00,512 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:00,532 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:00,534 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:00,548 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:00,564 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:00,566 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_479 99) (<= 50 v_main_~main__x~0_479)) InVars {main_~main__x~0=v_main_~main__x~0_479} OutVars{main_~main__x~0=v_main_~main__x~0_479} AuxVars[] AssignedVars[] [2021-05-02 23:42:00,568 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:00,569 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:00,571 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:00,579 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:00,581 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:00,602 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:00,618 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:03,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:03,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:04,523 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:04,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398063845] [2021-05-02 23:42:04,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398063845] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:04,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:04,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:42:04,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15607131] [2021-05-02 23:42:04,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:42:04,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:04,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:42:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:42:04,525 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand has 81 states, 81 states have (on average 1.9259259259259258) internal successors, (156), 80 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:16,274 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-05-02 23:42:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:42:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9259259259259258) internal successors, (156), 80 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-05-02 23:42:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:16,275 INFO L225 Difference]: With dead ends: 166 [2021-05-02 23:42:16,275 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 23:42:16,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 9499.7ms TimeCoverageRelationStatistics Valid=620, Invalid=24186, Unknown=0, NotChecked=0, Total=24806 [2021-05-02 23:42:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 23:42:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-05-02 23:42:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2021-05-02 23:42:16,294 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2021-05-02 23:42:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:16,294 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2021-05-02 23:42:16,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 1.9259259259259258) internal successors, (156), 80 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2021-05-02 23:42:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 23:42:16,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:16,295 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:16,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:42:16,295 INFO L428 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:16,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1790116720, now seen corresponding path program 9 times [2021-05-02 23:42:16,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:16,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570940875] [2021-05-02 23:42:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:16,322 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_490) (< v_main_~main__x~0_490 100)) InVars {main_~main__x~0=v_main_~main__x~0_490} OutVars{main_~main__x~0=v_main_~main__x~0_490} AuxVars[] AssignedVars[] [2021-05-02 23:42:16,330 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:16,332 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:16,336 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:16,353 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:16,357 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:16,393 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:16,415 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:16,423 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_492 99) (<= 50 v_main_~main__x~0_492)) InVars {main_~main__x~0=v_main_~main__x~0_492} OutVars{main_~main__x~0=v_main_~main__x~0_492} AuxVars[] AssignedVars[] [2021-05-02 23:42:16,427 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:16,446 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:16,451 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:16,464 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:16,467 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:16,490 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:16,511 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:20,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:20,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:21,615 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:21,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570940875] [2021-05-02 23:42:21,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570940875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:21,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:21,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:42:21,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530792197] [2021-05-02 23:42:21,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:42:21,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:21,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:42:21,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:42:21,618 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 82 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 81 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:36,480 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-05-02 23:42:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:42:36,481 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 81 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-02 23:42:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:36,482 INFO L225 Difference]: With dead ends: 168 [2021-05-02 23:42:36,482 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 23:42:36,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 12500.9ms TimeCoverageRelationStatistics Valid=628, Invalid=24812, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 23:42:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 23:42:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-05-02 23:42:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2021-05-02 23:42:36,498 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2021-05-02 23:42:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:36,499 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2021-05-02 23:42:36,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 81 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2021-05-02 23:42:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 23:42:36,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:36,500 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:36,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:42:36,500 INFO L428 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1972192586, now seen corresponding path program 10 times [2021-05-02 23:42:36,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:36,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98463159] [2021-05-02 23:42:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:36,510 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_504 100) (<= 50 v_main_~main__x~0_504)) InVars {main_~main__x~0=v_main_~main__x~0_504} OutVars{main_~main__x~0=v_main_~main__x~0_504} AuxVars[] AssignedVars[] [2021-05-02 23:42:36,513 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:36,530 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:36,533 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:36,547 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:36,550 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:36,569 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:36,591 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:36,594 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_506) (< v_main_~main__x~0_506 99)) InVars {main_~main__x~0=v_main_~main__x~0_506} OutVars{main_~main__x~0=v_main_~main__x~0_506} AuxVars[] AssignedVars[] [2021-05-02 23:42:36,597 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:36,599 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:36,602 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:36,619 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:36,622 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:36,660 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:36,682 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:40,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:40,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:41,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:42:42,402 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:42:42,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98463159] [2021-05-02 23:42:42,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [98463159] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:42:42,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:42:42,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:42:42,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652981688] [2021-05-02 23:42:42,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:42:42,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:42:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:42:42,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:42:42,404 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand has 83 states, 83 states have (on average 1.927710843373494) internal successors, (160), 82 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:42:56,588 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-05-02 23:42:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:42:56,589 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.927710843373494) internal successors, (160), 82 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-05-02 23:42:56,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:42:56,590 INFO L225 Difference]: With dead ends: 170 [2021-05-02 23:42:56,590 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 23:42:56,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 12567.4ms TimeCoverageRelationStatistics Valid=636, Invalid=25446, Unknown=0, NotChecked=0, Total=26082 [2021-05-02 23:42:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 23:42:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-05-02 23:42:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2021-05-02 23:42:56,607 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2021-05-02 23:42:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:42:56,607 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2021-05-02 23:42:56,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.927710843373494) internal successors, (160), 82 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:42:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2021-05-02 23:42:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 23:42:56,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:42:56,608 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:42:56,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:42:56,608 INFO L428 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:42:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:42:56,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1188972420, now seen corresponding path program 11 times [2021-05-02 23:42:56,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:42:56,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964678499] [2021-05-02 23:42:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:42:56,616 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_519) (< v_main_~main__x~0_519 100)) InVars {main_~main__x~0=v_main_~main__x~0_519} OutVars{main_~main__x~0=v_main_~main__x~0_519} AuxVars[] AssignedVars[] [2021-05-02 23:42:56,618 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:56,634 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:56,636 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:56,647 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:56,650 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:56,663 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:56,680 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:56,683 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_521) (< v_main_~main__x~0_521 99)) InVars {main_~main__x~0=v_main_~main__x~0_521} OutVars{main_~main__x~0=v_main_~main__x~0_521} AuxVars[] AssignedVars[] [2021-05-02 23:42:56,684 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:42:56,696 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:56,698 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:42:56,706 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:42:56,708 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:42:56,720 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:42:56,737 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:42:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:59,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:42:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:42:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:42:59,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:00,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:01,149 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:01,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964678499] [2021-05-02 23:43:01,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [964678499] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:01,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:01,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:43:01,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24797885] [2021-05-02 23:43:01,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:43:01,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:43:01,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:43:01,151 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 84 states, 84 states have (on average 1.9285714285714286) internal successors, (162), 83 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:16,842 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-05-02 23:43:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:43:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9285714285714286) internal successors, (162), 83 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-05-02 23:43:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:16,844 INFO L225 Difference]: With dead ends: 172 [2021-05-02 23:43:16,844 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 23:43:16,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 12029.9ms TimeCoverageRelationStatistics Valid=644, Invalid=26088, Unknown=0, NotChecked=0, Total=26732 [2021-05-02 23:43:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 23:43:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-05-02 23:43:16,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2021-05-02 23:43:16,860 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2021-05-02 23:43:16,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:16,860 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2021-05-02 23:43:16,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.9285714285714286) internal successors, (162), 83 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:16,860 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2021-05-02 23:43:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 23:43:16,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:16,861 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:16,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:43:16,861 INFO L428 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:16,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash 133669694, now seen corresponding path program 12 times [2021-05-02 23:43:16,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:16,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259018798] [2021-05-02 23:43:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:16,868 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_535) (< v_main_~main__x~0_535 100)) InVars {main_~main__x~0=v_main_~main__x~0_535} OutVars{main_~main__x~0=v_main_~main__x~0_535} AuxVars[] AssignedVars[] [2021-05-02 23:43:16,870 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:16,884 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:16,886 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:16,895 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:16,897 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:16,919 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:16,935 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:16,937 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_537 99) (<= 50 v_main_~main__x~0_537)) InVars {main_~main__x~0=v_main_~main__x~0_537} OutVars{main_~main__x~0=v_main_~main__x~0_537} AuxVars[] AssignedVars[] [2021-05-02 23:43:16,940 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:16,952 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:16,955 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:16,964 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:16,966 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:16,979 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:16,999 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:20,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:20,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:21,322 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259018798] [2021-05-02 23:43:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259018798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:21,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:21,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:43:21,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176552468] [2021-05-02 23:43:21,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:43:21,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:21,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:43:21,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:43:21,324 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand has 85 states, 85 states have (on average 1.9294117647058824) internal successors, (164), 84 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:43:35,328 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-05-02 23:43:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:43:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9294117647058824) internal successors, (164), 84 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-05-02 23:43:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:43:35,330 INFO L225 Difference]: With dead ends: 174 [2021-05-02 23:43:35,330 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 23:43:35,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3190 ImplicationChecksByTransitivity, 10850.8ms TimeCoverageRelationStatistics Valid=652, Invalid=26738, Unknown=0, NotChecked=0, Total=27390 [2021-05-02 23:43:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 23:43:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2021-05-02 23:43:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2021-05-02 23:43:35,345 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2021-05-02 23:43:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:43:35,346 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2021-05-02 23:43:35,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.9294117647058824) internal successors, (164), 84 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:43:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2021-05-02 23:43:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 23:43:35,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:43:35,346 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:43:35,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:43:35,347 INFO L428 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:43:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:43:35,347 INFO L82 PathProgramCache]: Analyzing trace with hash -399968136, now seen corresponding path program 13 times [2021-05-02 23:43:35,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:43:35,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096831523] [2021-05-02 23:43:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:43:35,353 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_552 100) (<= 50 v_main_~main__x~0_552)) InVars {main_~main__x~0=v_main_~main__x~0_552} OutVars{main_~main__x~0=v_main_~main__x~0_552} AuxVars[] AssignedVars[] [2021-05-02 23:43:35,355 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:35,366 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:35,371 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:35,380 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:35,382 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:35,394 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:35,413 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:35,416 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_554 99) (<= 50 v_main_~main__x~0_554)) InVars {main_~main__x~0=v_main_~main__x~0_554} OutVars{main_~main__x~0=v_main_~main__x~0_554} AuxVars[] AssignedVars[] [2021-05-02 23:43:35,418 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:43:35,430 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:35,433 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:43:35,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:43:35,447 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:43:35,462 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:43:35,481 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:43:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:38,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:43:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:43:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:43:38,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:38,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:43:39,933 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:43:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096831523] [2021-05-02 23:43:39,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2096831523] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:43:39,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:43:39,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:43:39,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211853180] [2021-05-02 23:43:39,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:43:39,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:43:39,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:43:39,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=7241, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:43:39,935 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand has 86 states, 86 states have (on average 1.930232558139535) internal successors, (166), 85 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:01,941 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-05-02 23:44:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:44:01,942 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.930232558139535) internal successors, (166), 85 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2021-05-02 23:44:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:01,943 INFO L225 Difference]: With dead ends: 176 [2021-05-02 23:44:01,943 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 23:44:01,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3298 ImplicationChecksByTransitivity, 15375.1ms TimeCoverageRelationStatistics Valid=634, Invalid=27422, Unknown=0, NotChecked=0, Total=28056 [2021-05-02 23:44:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 23:44:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-05-02 23:44:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2021-05-02 23:44:01,960 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2021-05-02 23:44:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:01,960 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2021-05-02 23:44:01,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 1.930232558139535) internal successors, (166), 85 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2021-05-02 23:44:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 23:44:01,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:01,961 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:01,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:44:01,962 INFO L428 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2124814542, now seen corresponding path program 14 times [2021-05-02 23:44:01,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:01,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342550720] [2021-05-02 23:44:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:01,980 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_570) (< v_main_~main__x~0_570 100)) InVars {main_~main__x~0=v_main_~main__x~0_570} OutVars{main_~main__x~0=v_main_~main__x~0_570} AuxVars[] AssignedVars[] [2021-05-02 23:44:01,983 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:02,017 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:02,025 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:02,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:02,049 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:02,073 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:02,104 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:02,108 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_572) (< v_main_~main__x~0_572 99)) InVars {main_~main__x~0=v_main_~main__x~0_572} OutVars{main_~main__x~0=v_main_~main__x~0_572} AuxVars[] AssignedVars[] [2021-05-02 23:44:02,112 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:02,114 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:02,118 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:02,135 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:02,139 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:02,183 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:02,207 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:07,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:07,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:09,954 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:09,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342550720] [2021-05-02 23:44:09,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [342550720] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:09,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:09,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:44:09,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019147407] [2021-05-02 23:44:09,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:44:09,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:44:09,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:44:09,956 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand has 87 states, 87 states have (on average 1.9310344827586208) internal successors, (168), 86 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:44:34,466 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-05-02 23:44:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:44:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9310344827586208) internal successors, (168), 86 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2021-05-02 23:44:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:44:34,469 INFO L225 Difference]: With dead ends: 178 [2021-05-02 23:44:34,469 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 23:44:34,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3355 ImplicationChecksByTransitivity, 19557.8ms TimeCoverageRelationStatistics Valid=668, Invalid=28062, Unknown=0, NotChecked=0, Total=28730 [2021-05-02 23:44:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 23:44:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-05-02 23:44:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2021-05-02 23:44:34,488 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2021-05-02 23:44:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:44:34,488 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2021-05-02 23:44:34,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.9310344827586208) internal successors, (168), 86 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:44:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2021-05-02 23:44:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 23:44:34,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:44:34,489 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:44:34,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:44:34,489 INFO L428 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:44:34,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:44:34,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1844834452, now seen corresponding path program 15 times [2021-05-02 23:44:34,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:44:34,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235571609] [2021-05-02 23:44:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:44:34,503 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_589) (< v_main_~main__x~0_589 100)) InVars {main_~main__x~0=v_main_~main__x~0_589} OutVars{main_~main__x~0=v_main_~main__x~0_589} AuxVars[] AssignedVars[] [2021-05-02 23:44:34,507 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:34,540 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:34,545 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:34,570 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:34,575 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:34,607 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:34,640 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:34,645 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_591) (< v_main_~main__x~0_591 99)) InVars {main_~main__x~0=v_main_~main__x~0_591} OutVars{main_~main__x~0=v_main_~main__x~0_591} AuxVars[] AssignedVars[] [2021-05-02 23:44:34,648 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:44:34,651 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:34,655 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:44:34,673 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:44:34,677 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:44:34,718 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:44:34,737 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:44:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:37,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:44:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:44:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:44:37,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:44:39,680 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:44:39,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235571609] [2021-05-02 23:44:39,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235571609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:44:39,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:44:39,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:44:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495627662] [2021-05-02 23:44:39,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:44:39,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:44:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:44:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:44:39,682 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 88 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 87 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:00,859 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-05-02 23:45:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:45:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 87 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2021-05-02 23:45:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:00,861 INFO L225 Difference]: With dead ends: 180 [2021-05-02 23:45:00,861 INFO L226 Difference]: Without dead ends: 177 [2021-05-02 23:45:00,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3439 ImplicationChecksByTransitivity, 14484.0ms TimeCoverageRelationStatistics Valid=676, Invalid=28736, Unknown=0, NotChecked=0, Total=29412 [2021-05-02 23:45:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-02 23:45:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-05-02 23:45:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2021-05-02 23:45:00,897 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2021-05-02 23:45:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:00,898 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2021-05-02 23:45:00,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 87 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2021-05-02 23:45:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 23:45:00,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:00,899 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:00,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:45:00,899 INFO L428 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 928059686, now seen corresponding path program 16 times [2021-05-02 23:45:00,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:00,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214193423] [2021-05-02 23:45:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:00,907 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_609) (< v_main_~main__x~0_609 100)) InVars {main_~main__x~0=v_main_~main__x~0_609} OutVars{main_~main__x~0=v_main_~main__x~0_609} AuxVars[] AssignedVars[] [2021-05-02 23:45:00,910 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:00,911 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,913 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,926 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:00,928 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:00,962 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:00,983 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:00,985 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_611) (< v_main_~main__x~0_611 99)) InVars {main_~main__x~0=v_main_~main__x~0_611} OutVars{main_~main__x~0=v_main_~main__x~0_611} AuxVars[] AssignedVars[] [2021-05-02 23:45:00,986 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:00,987 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,989 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:00,997 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:01,000 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:01,023 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:01,041 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:06,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:06,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:06,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:09,627 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:09,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214193423] [2021-05-02 23:45:09,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214193423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:09,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:09,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:45:09,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773719204] [2021-05-02 23:45:09,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:45:09,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:09,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:45:09,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=7577, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:45:09,629 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand has 89 states, 89 states have (on average 1.9325842696629214) internal successors, (172), 88 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:22,231 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2021-05-02 23:45:22,482 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2021-05-02 23:45:22,757 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-05-02 23:45:23,010 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2021-05-02 23:45:23,273 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 44 [2021-05-02 23:45:23,549 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2021-05-02 23:45:23,822 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2021-05-02 23:45:24,093 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2021-05-02 23:45:24,285 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 45 [2021-05-02 23:45:24,480 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2021-05-02 23:45:24,666 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2021-05-02 23:45:24,849 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2021-05-02 23:45:25,076 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-05-02 23:45:25,395 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-05-02 23:45:25,690 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-05-02 23:45:25,976 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-05-02 23:45:26,267 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-05-02 23:45:26,546 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-05-02 23:45:26,811 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-05-02 23:45:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:27,570 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-05-02 23:45:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:45:27,571 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9325842696629214) internal successors, (172), 88 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2021-05-02 23:45:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:27,572 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:45:27,572 INFO L226 Difference]: Without dead ends: 179 [2021-05-02 23:45:27,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3830 ImplicationChecksByTransitivity, 19294.2ms TimeCoverageRelationStatistics Valid=1449, Invalid=28653, Unknown=0, NotChecked=0, Total=30102 [2021-05-02 23:45:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-02 23:45:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2021-05-02 23:45:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2021-05-02 23:45:27,595 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2021-05-02 23:45:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:27,596 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2021-05-02 23:45:27,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.9325842696629214) internal successors, (172), 88 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2021-05-02 23:45:27,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-02 23:45:27,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:27,596 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:27,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:45:27,597 INFO L428 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1495364512, now seen corresponding path program 17 times [2021-05-02 23:45:27,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:27,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366788585] [2021-05-02 23:45:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:27,604 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_630) (< v_main_~main__x~0_630 100)) InVars {main_~main__x~0=v_main_~main__x~0_630} OutVars{main_~main__x~0=v_main_~main__x~0_630} AuxVars[] AssignedVars[] [2021-05-02 23:45:27,617 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:27,619 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:27,620 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:27,630 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:27,632 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:27,655 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:27,674 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:27,676 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_632) (< v_main_~main__x~0_632 99)) InVars {main_~main__x~0=v_main_~main__x~0_632} OutVars{main_~main__x~0=v_main_~main__x~0_632} AuxVars[] AssignedVars[] [2021-05-02 23:45:27,677 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:45:27,678 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:27,680 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:27,689 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:45:27,691 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:45:27,713 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:45:27,731 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:30,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:30,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:33,020 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:33,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366788585] [2021-05-02 23:45:33,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366788585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:33,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:33,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:45:33,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73042758] [2021-05-02 23:45:33,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:45:33,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:45:33,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:45:33,022 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand has 90 states, 90 states have (on average 1.9333333333333333) internal successors, (174), 89 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:04,935 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-05-02 23:46:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:46:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.9333333333333333) internal successors, (174), 89 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2021-05-02 23:46:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:04,938 INFO L225 Difference]: With dead ends: 184 [2021-05-02 23:46:04,938 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 23:46:04,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 19413.0ms TimeCoverageRelationStatistics Valid=692, Invalid=30108, Unknown=0, NotChecked=0, Total=30800 [2021-05-02 23:46:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 23:46:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2021-05-02 23:46:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 176 states have (on average 1.0056818181818181) internal successors, (177), 176 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2021-05-02 23:46:04,956 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2021-05-02 23:46:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:04,956 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2021-05-02 23:46:04,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 1.9333333333333333) internal successors, (174), 89 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2021-05-02 23:46:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 23:46:04,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:04,957 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:04,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:46:04,958 INFO L428 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:04,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1761222938, now seen corresponding path program 18 times [2021-05-02 23:46:04,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:04,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25582979] [2021-05-02 23:46:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:04,970 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_652 100) (<= 50 v_main_~main__x~0_652)) InVars {main_~main__x~0=v_main_~main__x~0_652} OutVars{main_~main__x~0=v_main_~main__x~0_652} AuxVars[] AssignedVars[] [2021-05-02 23:46:04,972 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:04,974 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,978 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,998 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:05,003 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:05,062 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:05,107 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:05,113 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_654 99) (<= 50 v_main_~main__x~0_654)) InVars {main_~main__x~0=v_main_~main__x~0_654} OutVars{main_~main__x~0=v_main_~main__x~0_654} AuxVars[] AssignedVars[] [2021-05-02 23:46:05,116 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:05,143 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:05,152 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:05,173 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:05,177 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:05,207 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:05,245 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:09,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:09,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:09,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,095 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:11,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25582979] [2021-05-02 23:46:11,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [25582979] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:11,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:11,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:46:11,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849687407] [2021-05-02 23:46:11,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:46:11,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:11,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:46:11,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1696, Invalid=6676, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:46:11,097 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand has 91 states, 91 states have (on average 1.934065934065934) internal successors, (176), 90 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:21,751 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2021-05-02 23:46:21,961 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-05-02 23:46:22,180 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2021-05-02 23:46:22,427 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 44 [2021-05-02 23:46:22,714 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2021-05-02 23:46:22,959 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 44 [2021-05-02 23:46:23,200 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2021-05-02 23:46:23,451 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 45 [2021-05-02 23:46:23,662 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2021-05-02 23:46:23,857 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 45 [2021-05-02 23:46:24,055 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2021-05-02 23:46:24,242 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2021-05-02 23:46:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:26,255 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-05-02 23:46:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:46:26,256 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.934065934065934) internal successors, (176), 90 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2021-05-02 23:46:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:26,256 INFO L225 Difference]: With dead ends: 186 [2021-05-02 23:46:26,257 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 23:46:26,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5967 ImplicationChecksByTransitivity, 16028.5ms TimeCoverageRelationStatistics Valid=5288, Invalid=26218, Unknown=0, NotChecked=0, Total=31506 [2021-05-02 23:46:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 23:46:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2021-05-02 23:46:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.0056179775280898) internal successors, (179), 178 states have internal predecessors, (179), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2021-05-02 23:46:26,274 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2021-05-02 23:46:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:26,275 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2021-05-02 23:46:26,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 1.934065934065934) internal successors, (176), 90 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2021-05-02 23:46:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-02 23:46:26,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:26,275 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:26,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:46:26,276 INFO L428 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:26,276 INFO L82 PathProgramCache]: Analyzing trace with hash 310603604, now seen corresponding path program 19 times [2021-05-02 23:46:26,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:26,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595584206] [2021-05-02 23:46:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:26,283 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_675) (< v_main_~main__x~0_675 100)) InVars {main_~main__x~0=v_main_~main__x~0_675} OutVars{main_~main__x~0=v_main_~main__x~0_675} AuxVars[] AssignedVars[] [2021-05-02 23:46:26,285 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:26,301 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:26,303 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:26,316 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:26,318 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:26,338 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:26,362 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:26,366 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_677 99) (<= 50 v_main_~main__x~0_677)) InVars {main_~main__x~0=v_main_~main__x~0_677} OutVars{main_~main__x~0=v_main_~main__x~0_677} AuxVars[] AssignedVars[] [2021-05-02 23:46:26,368 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:26,384 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:26,387 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:26,398 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:26,401 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:26,417 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:26,438 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:30,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:30,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:30,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:32,546 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:32,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595584206] [2021-05-02 23:46:32,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [595584206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:32,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:32,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:46:32,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832653215] [2021-05-02 23:46:32,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:46:32,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:32,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:46:32,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=8284, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:46:32,548 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand has 92 states, 92 states have (on average 1.934782608695652) internal successors, (178), 91 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:52,433 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-05-02 23:46:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:46:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.934782608695652) internal successors, (178), 91 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2021-05-02 23:46:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:52,435 INFO L225 Difference]: With dead ends: 188 [2021-05-02 23:46:52,435 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 23:46:52,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3785 ImplicationChecksByTransitivity, 14819.2ms TimeCoverageRelationStatistics Valid=708, Invalid=31512, Unknown=0, NotChecked=0, Total=32220 [2021-05-02 23:46:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 23:46:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-05-02 23:46:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2021-05-02 23:46:52,452 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2021-05-02 23:46:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:52,453 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2021-05-02 23:46:52,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 1.934782608695652) internal successors, (178), 91 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2021-05-02 23:46:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 23:46:52,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:52,457 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:52,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:46:52,457 INFO L428 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2129794830, now seen corresponding path program 20 times [2021-05-02 23:46:52,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:52,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992253841] [2021-05-02 23:46:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:52,465 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_699) (< v_main_~main__x~0_699 100)) InVars {main_~main__x~0=v_main_~main__x~0_699} OutVars{main_~main__x~0=v_main_~main__x~0_699} AuxVars[] AssignedVars[] [2021-05-02 23:46:52,467 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:52,480 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:52,482 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:52,491 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:52,494 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:52,509 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:52,536 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:52,539 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_701 99) (<= 50 v_main_~main__x~0_701)) InVars {main_~main__x~0=v_main_~main__x~0_701} OutVars{main_~main__x~0=v_main_~main__x~0_701} AuxVars[] AssignedVars[] [2021-05-02 23:46:52,541 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:46:52,559 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:52,561 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:52,576 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:46:52,579 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:46:52,600 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:46:52,626 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:46:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:56,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:56,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:56,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:58,572 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:58,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992253841] [2021-05-02 23:46:58,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [992253841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:58,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:58,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:46:58,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684156924] [2021-05-02 23:46:58,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:46:58,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:58,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:46:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=8297, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:46:58,574 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 93 states, 93 states have (on average 1.935483870967742) internal successors, (180), 92 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:12,160 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2021-05-02 23:47:12,441 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-05-02 23:47:12,726 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2021-05-02 23:47:13,017 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 44 [2021-05-02 23:47:13,322 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2021-05-02 23:47:13,629 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 44 [2021-05-02 23:47:13,942 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2021-05-02 23:47:14,247 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2021-05-02 23:47:14,559 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2021-05-02 23:47:14,858 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 45 [2021-05-02 23:47:15,083 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2021-05-02 23:47:15,314 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 45 [2021-05-02 23:47:15,543 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2021-05-02 23:47:15,762 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2021-05-02 23:47:15,975 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2021-05-02 23:47:16,180 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-05-02 23:47:16,380 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-05-02 23:47:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:18,158 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-05-02 23:47:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:47:18,159 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.935483870967742) internal successors, (180), 92 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2021-05-02 23:47:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:18,160 INFO L225 Difference]: With dead ends: 190 [2021-05-02 23:47:18,160 INFO L226 Difference]: Without dead ends: 187 [2021-05-02 23:47:18,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4248 ImplicationChecksByTransitivity, 17216.9ms TimeCoverageRelationStatistics Valid=1549, Invalid=31393, Unknown=0, NotChecked=0, Total=32942 [2021-05-02 23:47:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-02 23:47:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-05-02 23:47:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.0054945054945055) internal successors, (183), 182 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2021-05-02 23:47:18,183 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2021-05-02 23:47:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:18,183 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2021-05-02 23:47:18,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 1.935483870967742) internal successors, (180), 92 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2021-05-02 23:47:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 23:47:18,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:18,184 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:18,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:47:18,184 INFO L428 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:18,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1974093752, now seen corresponding path program 21 times [2021-05-02 23:47:18,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:18,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589286144] [2021-05-02 23:47:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:18,199 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_724 100) (<= 50 v_main_~main__x~0_724)) InVars {main_~main__x~0=v_main_~main__x~0_724} OutVars{main_~main__x~0=v_main_~main__x~0_724} AuxVars[] AssignedVars[] [2021-05-02 23:47:18,201 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:18,203 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,205 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,218 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:18,221 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:18,252 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:18,277 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:18,280 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_726 99) (<= 50 v_main_~main__x~0_726)) InVars {main_~main__x~0=v_main_~main__x~0_726} OutVars{main_~main__x~0=v_main_~main__x~0_726} AuxVars[] AssignedVars[] [2021-05-02 23:47:18,282 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:18,298 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,300 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,312 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:18,315 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:18,333 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:18,358 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:21,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:21,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:22,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:23,824 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:23,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589286144] [2021-05-02 23:47:23,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [589286144] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:23,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:23,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:47:23,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931273157] [2021-05-02 23:47:23,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:47:23,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:23,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:47:23,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1705, Invalid=7225, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:47:23,826 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand has 94 states, 94 states have (on average 1.9361702127659575) internal successors, (182), 93 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:36,040 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2021-05-02 23:47:36,340 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2021-05-02 23:47:36,639 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2021-05-02 23:47:36,942 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-05-02 23:47:37,252 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2021-05-02 23:47:37,605 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 44 [2021-05-02 23:47:37,962 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2021-05-02 23:47:38,305 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 44 [2021-05-02 23:47:38,640 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2021-05-02 23:47:38,974 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2021-05-02 23:47:39,319 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2021-05-02 23:47:39,681 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 44 [2021-05-02 23:47:40,018 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 45 [2021-05-02 23:47:40,255 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2021-05-02 23:47:40,480 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 45 [2021-05-02 23:47:40,693 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2021-05-02 23:47:40,900 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2021-05-02 23:47:41,101 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2021-05-02 23:47:41,299 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-05-02 23:47:41,504 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-05-02 23:47:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:43,284 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-05-02 23:47:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:47:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9361702127659575) internal successors, (182), 93 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2021-05-02 23:47:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:43,286 INFO L225 Difference]: With dead ends: 192 [2021-05-02 23:47:43,286 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 23:47:43,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6432 ImplicationChecksByTransitivity, 17227.3ms TimeCoverageRelationStatistics Valid=5363, Invalid=28309, Unknown=0, NotChecked=0, Total=33672 [2021-05-02 23:47:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 23:47:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-05-02 23:47:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.0054347826086956) internal successors, (185), 184 states have internal predecessors, (185), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2021-05-02 23:47:43,305 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2021-05-02 23:47:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:43,306 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2021-05-02 23:47:43,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 1.9361702127659575) internal successors, (182), 93 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2021-05-02 23:47:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-02 23:47:43,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:43,307 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:43,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:47:43,307 INFO L428 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1263923970, now seen corresponding path program 22 times [2021-05-02 23:47:43,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:43,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601066820] [2021-05-02 23:47:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:43,314 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_750) (< v_main_~main__x~0_750 100)) InVars {main_~main__x~0=v_main_~main__x~0_750} OutVars{main_~main__x~0=v_main_~main__x~0_750} AuxVars[] AssignedVars[] [2021-05-02 23:47:43,316 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:43,333 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:43,335 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:43,348 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:43,351 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:43,376 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:43,404 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:43,407 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_752 99) (<= 50 v_main_~main__x~0_752)) InVars {main_~main__x~0=v_main_~main__x~0_752} OutVars{main_~main__x~0=v_main_~main__x~0_752} AuxVars[] AssignedVars[] [2021-05-02 23:47:43,409 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:47:43,410 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:43,412 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:43,440 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:47:43,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:47:43,484 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:47:43,518 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:47:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:47,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:47,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:48,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:50,905 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:50,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601066820] [2021-05-02 23:47:50,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1601066820] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:50,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:50,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:47:50,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338559323] [2021-05-02 23:47:50,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:47:50,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:47:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:47:50,906 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand has 95 states, 95 states have (on average 1.936842105263158) internal successors, (184), 94 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:15,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:15,774 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-05-02 23:48:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:48:15,775 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.936842105263158) internal successors, (184), 94 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2021-05-02 23:48:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:15,776 INFO L225 Difference]: With dead ends: 194 [2021-05-02 23:48:15,776 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 23:48:15,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4055 ImplicationChecksByTransitivity, 17780.7ms TimeCoverageRelationStatistics Valid=732, Invalid=33678, Unknown=0, NotChecked=0, Total=34410 [2021-05-02 23:48:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 23:48:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2021-05-02 23:48:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.0053763440860215) internal successors, (187), 186 states have internal predecessors, (187), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2021-05-02 23:48:15,803 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2021-05-02 23:48:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:15,803 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2021-05-02 23:48:15,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 1.936842105263158) internal successors, (184), 94 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2021-05-02 23:48:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 23:48:15,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:15,804 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:15,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:48:15,804 INFO L428 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:15,805 INFO L82 PathProgramCache]: Analyzing trace with hash -852334788, now seen corresponding path program 23 times [2021-05-02 23:48:15,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:15,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553112202] [2021-05-02 23:48:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:15,812 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_777) (< v_main_~main__x~0_777 100)) InVars {main_~main__x~0=v_main_~main__x~0_777} OutVars{main_~main__x~0=v_main_~main__x~0_777} AuxVars[] AssignedVars[] [2021-05-02 23:48:15,814 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:15,830 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:15,833 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:15,844 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:15,847 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:15,866 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:15,895 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:15,897 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_779) (< v_main_~main__x~0_779 99)) InVars {main_~main__x~0=v_main_~main__x~0_779} OutVars{main_~main__x~0=v_main_~main__x~0_779} AuxVars[] AssignedVars[] [2021-05-02 23:48:15,899 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:15,900 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:15,903 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:15,919 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:15,923 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:15,957 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:15,985 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:19,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:19,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:22,326 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:22,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553112202] [2021-05-02 23:48:22,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [553112202] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:22,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:22,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:48:22,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352760055] [2021-05-02 23:48:22,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:48:22,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:22,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:48:22,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=7753, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:48:22,328 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand has 96 states, 96 states have (on average 1.9375) internal successors, (186), 95 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:43,745 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2021-05-02 23:48:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:48:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9375) internal successors, (186), 95 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2021-05-02 23:48:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:43,748 INFO L225 Difference]: With dead ends: 196 [2021-05-02 23:48:43,748 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 23:48:43,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 17277.2ms TimeCoverageRelationStatistics Valid=4565, Invalid=30591, Unknown=0, NotChecked=0, Total=35156 [2021-05-02 23:48:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 23:48:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 23:48:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2021-05-02 23:48:43,775 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2021-05-02 23:48:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:43,775 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2021-05-02 23:48:43,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 1.9375) internal successors, (186), 95 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2021-05-02 23:48:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 23:48:43,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:43,776 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:43,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:48:43,776 INFO L428 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:43,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:43,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1237497078, now seen corresponding path program 24 times [2021-05-02 23:48:43,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:43,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448700900] [2021-05-02 23:48:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:43,784 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_805) (< v_main_~main__x~0_805 100)) InVars {main_~main__x~0=v_main_~main__x~0_805} OutVars{main_~main__x~0=v_main_~main__x~0_805} AuxVars[] AssignedVars[] [2021-05-02 23:48:43,786 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:43,788 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:43,790 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:43,802 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:43,805 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:43,839 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:43,872 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:43,874 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_807) (< v_main_~main__x~0_807 99)) InVars {main_~main__x~0=v_main_~main__x~0_807} OutVars{main_~main__x~0=v_main_~main__x~0_807} AuxVars[] AssignedVars[] [2021-05-02 23:48:43,876 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:48:43,898 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:43,900 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:43,913 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:48:43,916 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:48:43,937 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:48:43,970 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:48:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:48,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:48,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:48,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:51,197 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:51,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448700900] [2021-05-02 23:48:51,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448700900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:51,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:51,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:48:51,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336003063] [2021-05-02 23:48:51,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:48:51,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:51,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:48:51,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1562, Invalid=7944, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:48:51,199 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand has 97 states, 97 states have (on average 1.9381443298969072) internal successors, (188), 96 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:20,541 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-05-02 23:49:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:49:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9381443298969072) internal successors, (188), 96 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-05-02 23:49:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:20,545 INFO L225 Difference]: With dead ends: 198 [2021-05-02 23:49:20,545 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 23:49:20,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6490 ImplicationChecksByTransitivity, 19831.5ms TimeCoverageRelationStatistics Valid=4573, Invalid=31337, Unknown=0, NotChecked=0, Total=35910 [2021-05-02 23:49:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 23:49:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-05-02 23:49:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2021-05-02 23:49:20,566 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2021-05-02 23:49:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:20,566 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2021-05-02 23:49:20,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 1.9381443298969072) internal successors, (188), 96 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2021-05-02 23:49:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 23:49:20,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:20,567 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:20,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:49:20,567 INFO L428 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash -478774224, now seen corresponding path program 25 times [2021-05-02 23:49:20,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:20,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350389259] [2021-05-02 23:49:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:20,580 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_834) (< v_main_~main__x~0_834 100)) InVars {main_~main__x~0=v_main_~main__x~0_834} OutVars{main_~main__x~0=v_main_~main__x~0_834} AuxVars[] AssignedVars[] [2021-05-02 23:49:20,583 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:49:20,613 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,616 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,636 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:20,641 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:20,672 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:49:20,728 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:20,732 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_836 99) (<= 50 v_main_~main__x~0_836)) InVars {main_~main__x~0=v_main_~main__x~0_836} OutVars{main_~main__x~0=v_main_~main__x~0_836} AuxVars[] AssignedVars[] [2021-05-02 23:49:20,734 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:49:20,735 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,738 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,756 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:20,760 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:20,805 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:49:20,844 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:27,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:27,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:27,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:32,138 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:32,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350389259] [2021-05-02 23:49:32,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350389259] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:32,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:32,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:49:32,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885341958] [2021-05-02 23:49:32,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:49:32,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:32,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:49:32,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=9412, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:49:32,140 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand has 98 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 97 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:11,798 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2021-05-02 23:50:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:50:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 97 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-05-02 23:50:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:11,801 INFO L225 Difference]: With dead ends: 200 [2021-05-02 23:50:11,801 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 23:50:11,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 26623.6ms TimeCoverageRelationStatistics Valid=756, Invalid=35916, Unknown=0, NotChecked=0, Total=36672 [2021-05-02 23:50:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 23:50:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-05-02 23:50:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2021-05-02 23:50:11,821 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2021-05-02 23:50:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:11,821 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2021-05-02 23:50:11,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 97 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2021-05-02 23:50:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 23:50:11,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:11,822 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:11,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:50:11,823 INFO L428 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:11,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:11,823 INFO L82 PathProgramCache]: Analyzing trace with hash -548053782, now seen corresponding path program 26 times [2021-05-02 23:50:11,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:11,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733025133] [2021-05-02 23:50:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:11,836 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_864 100) (<= 50 v_main_~main__x~0_864)) InVars {main_~main__x~0=v_main_~main__x~0_864} OutVars{main_~main__x~0=v_main_~main__x~0_864} AuxVars[] AssignedVars[] [2021-05-02 23:50:11,841 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:50:11,864 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,869 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,887 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:11,892 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:11,919 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:50:11,960 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:11,964 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 50 v_main_~main__x~0_866) (< v_main_~main__x~0_866 99)) InVars {main_~main__x~0=v_main_~main__x~0_866} OutVars{main_~main__x~0=v_main_~main__x~0_866} AuxVars[] AssignedVars[] [2021-05-02 23:50:11,966 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:50:11,967 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,970 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,988 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:11,992 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:12,041 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:50:12,083 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:18,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:18,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:19,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:24,637 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:24,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733025133] [2021-05-02 23:50:24,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1733025133] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:24,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:24,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:50:24,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306887923] [2021-05-02 23:50:24,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:50:24,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:24,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:50:24,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9607, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:50:24,639 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand has 99 states, 99 states have (on average 1.9393939393939394) internal successors, (192), 98 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:11,366 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2021-05-02 23:51:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:51:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9393939393939394) internal successors, (192), 98 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2021-05-02 23:51:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:11,370 INFO L225 Difference]: With dead ends: 202 [2021-05-02 23:51:11,370 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 23:51:11,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4429 ImplicationChecksByTransitivity, 30009.0ms TimeCoverageRelationStatistics Valid=764, Invalid=36678, Unknown=0, NotChecked=0, Total=37442 [2021-05-02 23:51:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 23:51:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2021-05-02 23:51:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:11,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2021-05-02 23:51:11,392 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2021-05-02 23:51:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:11,392 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2021-05-02 23:51:11,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 1.9393939393939394) internal successors, (192), 98 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2021-05-02 23:51:11,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 23:51:11,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:11,394 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:11,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:51:11,394 INFO L428 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:11,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1593767716, now seen corresponding path program 27 times [2021-05-02 23:51:11,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:11,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359084842] [2021-05-02 23:51:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:11,405 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_895 100) (<= 50 v_main_~main__x~0_895)) InVars {main_~main__x~0=v_main_~main__x~0_895} OutVars{main_~main__x~0=v_main_~main__x~0_895} AuxVars[] AssignedVars[] [2021-05-02 23:51:11,408 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:51:11,410 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:11,413 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:11,436 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:11,442 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:11,504 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:51:11,561 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:11,565 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~main__x~0_897 99) (<= 50 v_main_~main__x~0_897)) InVars {main_~main__x~0=v_main_~main__x~0_897} OutVars{main_~main__x~0=v_main_~main__x~0_897} AuxVars[] AssignedVars[] [2021-05-02 23:51:11,567 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size [2021-05-02 23:51:11,569 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:11,572 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:11,594 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:11,598 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:11,657 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 92.2 percent of original size 71 [2021-05-02 23:51:11,711 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:20,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:20,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:20,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:26,556 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:26,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359084842] [2021-05-02 23:51:26,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [359084842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:26,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:26,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:51:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917191717] [2021-05-02 23:51:26,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:51:26,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:26,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:51:26,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=9804, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:51:26,558 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand has 100 states, 100 states have (on average 1.94) internal successors, (194), 99 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)