/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-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:16:06,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:16:06,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:16:06,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:16:06,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:16:06,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:16:06,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:16:06,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:16:06,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:16:06,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:16:06,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:16:06,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:16:06,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:16:06,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:16:06,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:16:06,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:16:06,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 23:16:06,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:16:06,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:16:06,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:16:06,676 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 23:16:06,690 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:16:06,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:16:06,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:16:06,692 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:16:06,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:16:06,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:16:06,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:16:06,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:16:06,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:16:06,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:16:06,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:16:06,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:16:06,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:16:06,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:16:06,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:16:06,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:16:06,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:16:06,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:16:06,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:16:06,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:16:06,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:16:06,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:16:06,695 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:16:06,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:16:07,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:16:07,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:16:07,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:16:07,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:16:07,047 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:16:07,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2021-05-02 23:16:07,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47839a132/9592abd555b6402390fa017aca9ff400/FLAG89beeb0f5 [2021-05-02 23:16:07,644 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:16:07,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2021-05-02 23:16:07,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47839a132/9592abd555b6402390fa017aca9ff400/FLAG89beeb0f5 [2021-05-02 23:16:08,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47839a132/9592abd555b6402390fa017aca9ff400 [2021-05-02 23:16:08,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:16:08,040 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:16:08,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:08,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:16:08,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:16:08,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:08" (1/1) ... [2021-05-02 23:16:08,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b996222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08, skipping insertion in model container [2021-05-02 23:16:08,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:08" (1/1) ... [2021-05-02 23:16:08,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:16:08,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:16:08,259 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-acceleration/array_1-1.c[321,334] [2021-05-02 23:16:08,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:08,287 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:16:08,341 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-acceleration/array_1-1.c[321,334] [2021-05-02 23:16:08,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:08,367 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:16:08,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08 WrapperNode [2021-05-02 23:16:08,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:08,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:16:08,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:16:08,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:16:08,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08" (1/1) ... [2021-05-02 23:16:08,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08" (1/1) ... [2021-05-02 23:16:08,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08" (1/1) ... [2021-05-02 23:16:08,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08" (1/1) ... [2021-05-02 23:16:08,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08" (1/1) ... [2021-05-02 23:16:08,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08" (1/1) ... [2021-05-02 23:16:08,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08" (1/1) ... [2021-05-02 23:16:08,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:16:08,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:16:08,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:16:08,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:16:08,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08" (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 23:16:08,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:16:08,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:16:08,518 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:16:08,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:16:08,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:16:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:16:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:16:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:16:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:16:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:16:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:16:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:16:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:16:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:16:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:16:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:16:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:16:08,813 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:16:08,813 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:16:08,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:08 BoogieIcfgContainer [2021-05-02 23:16:08,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:16:08,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:16:08,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:16:08,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:16:08,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:16:08" (1/3) ... [2021-05-02 23:16:08,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f54844e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:08, skipping insertion in model container [2021-05-02 23:16:08,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:08" (2/3) ... [2021-05-02 23:16:08,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f54844e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:08, skipping insertion in model container [2021-05-02 23:16:08,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:08" (3/3) ... [2021-05-02 23:16:08,841 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2021-05-02 23:16:08,847 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:16:08,851 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:16:08,885 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:16:08,909 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:16:08,910 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:16:08,910 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:16:08,910 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:16:08,910 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:16:08,910 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:16:08,910 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:16:08,910 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:16:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:16:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:16:08,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:08,934 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:08,935 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2003232087, now seen corresponding path program 1 times [2021-05-02 23:16:08,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:08,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472211336] [2021-05-02 23:16:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:09,009 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,254 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 23:16:09,256 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472211336] [2021-05-02 23:16:09,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472211336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:09,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:09,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:16:09,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001157964] [2021-05-02 23:16:09,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:16:09,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:09,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:16:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:09,279 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:09,362 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 23:16:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:16:09,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:16:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:09,369 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:16:09,369 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 23:16:09,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 23:16:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 23:16:09,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 23:16:09,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 23:16:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:09,400 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 23:16:09,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 23:16:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:16:09,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:09,401 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:09,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:16:09,401 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:09,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:09,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1831457181, now seen corresponding path program 1 times [2021-05-02 23:16:09,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:09,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677652633] [2021-05-02 23:16:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:09,405 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,524 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 23:16:09,524 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:09,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677652633] [2021-05-02 23:16:09,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [677652633] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:09,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:09,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:16:09,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425077065] [2021-05-02 23:16:09,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:16:09,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:09,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:16:09,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:09,528 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:09,598 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:16:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:16:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:16:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:09,600 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:16:09,601 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 23:16:09,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 23:16:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 23:16:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 23:16:09,623 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 23:16:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:09,624 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 23:16:09,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 23:16:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:16:09,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:09,625 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:09,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:16:09,626 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:09,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1746962049, now seen corresponding path program 1 times [2021-05-02 23:16:09,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:09,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131737774] [2021-05-02 23:16:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:09,649 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:09,654 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,774 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 23:16:09,774 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:09,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131737774] [2021-05-02 23:16:09,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131737774] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:09,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:09,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:16:09,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192988876] [2021-05-02 23:16:09,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:16:09,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:09,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:16:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:09,777 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:09,817 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 23:16:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:16:09,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 23:16:09,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:09,818 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:16:09,818 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:16:09,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:16:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 23:16:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:16:09,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 23:16:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:09,823 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:16:09,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:16:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:16:09,824 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:09,824 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:09,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:16:09,825 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash -339037983, now seen corresponding path program 2 times [2021-05-02 23:16:09,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:09,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029585530] [2021-05-02 23:16:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:09,831 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:09,832 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:09,924 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 23:16:09,924 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:09,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029585530] [2021-05-02 23:16:09,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1029585530] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:09,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:09,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:09,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902434515] [2021-05-02 23:16:09,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:09,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:09,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:09,929 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:10,008 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 23:16:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:10,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 23:16:10,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:10,011 INFO L225 Difference]: With dead ends: 26 [2021-05-02 23:16:10,011 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 23:16:10,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:10,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 23:16:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 23:16:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 23:16:10,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 23:16:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:10,017 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 23:16:10,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,017 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 23:16:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:16:10,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:10,018 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:10,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:16:10,019 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:10,019 INFO L82 PathProgramCache]: Analyzing trace with hash -238708797, now seen corresponding path program 3 times [2021-05-02 23:16:10,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:10,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147770974] [2021-05-02 23:16:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:10,029 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:10,034 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,148 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 23:16:10,148 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:10,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147770974] [2021-05-02 23:16:10,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [147770974] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:10,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:10,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:10,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968687142] [2021-05-02 23:16:10,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:10,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:10,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:10,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:10,152 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:10,222 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 23:16:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:10,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 23:16:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:10,225 INFO L225 Difference]: With dead ends: 28 [2021-05-02 23:16:10,226 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:16:10,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:16:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 23:16:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 23:16:10,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 23:16:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:10,241 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 23:16:10,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 23:16:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:16:10,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:10,243 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:10,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:16:10,244 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1688358437, now seen corresponding path program 4 times [2021-05-02 23:16:10,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:10,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905821581] [2021-05-02 23:16:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:10,253 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:10,257 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,385 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 23:16:10,390 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:10,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905821581] [2021-05-02 23:16:10,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [905821581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:10,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:10,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:16:10,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004411492] [2021-05-02 23:16:10,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:16:10,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:10,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:16:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:10,397 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:10,462 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 23:16:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:10,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 23:16:10,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:10,465 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:16:10,465 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 23:16:10,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 23:16:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-02 23:16:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 23:16:10,479 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 23:16:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:10,479 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 23:16:10,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 23:16:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:16:10,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:10,480 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:10,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:16:10,481 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:10,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1825901561, now seen corresponding path program 5 times [2021-05-02 23:16:10,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:10,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263210047] [2021-05-02 23:16:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:10,488 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:10,489 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,650 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 23:16:10,650 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263210047] [2021-05-02 23:16:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263210047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:10,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:10,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:10,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374565790] [2021-05-02 23:16:10,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:10,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:10,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:10,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:10,652 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:10,732 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 23:16:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:10,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 23:16:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:10,734 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:16:10,734 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 23:16:10,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 23:16:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 23:16:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 23:16:10,743 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 23:16:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:10,744 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 23:16:10,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 23:16:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:16:10,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:10,745 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:10,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:16:10,746 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:10,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1109502313, now seen corresponding path program 6 times [2021-05-02 23:16:10,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:10,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062559473] [2021-05-02 23:16:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:10,755 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:10,756 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:10,885 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 23:16:10,886 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:10,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062559473] [2021-05-02 23:16:10,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062559473] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:10,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:10,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154804168] [2021-05-02 23:16:10,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:10,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:10,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:10,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:10,888 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:10,953 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 23:16:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:10,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 23:16:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:10,955 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:16:10,955 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:16:10,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:16:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 23:16:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 23:16:10,967 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 23:16:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:10,967 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 23:16:10,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 23:16:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:16:10,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:10,968 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:10,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:16:10,969 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash 239111755, now seen corresponding path program 7 times [2021-05-02 23:16:10,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:10,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852687841] [2021-05-02 23:16:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:10,982 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:10,987 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:11,150 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:11,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852687841] [2021-05-02 23:16:11,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852687841] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:11,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:11,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:11,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511872780] [2021-05-02 23:16:11,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:11,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:11,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:11,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:11,153 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:11,250 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 23:16:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:11,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 23:16:11,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:11,256 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:16:11,256 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:16:11,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:16:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 23:16:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 23:16:11,270 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 23:16:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:11,270 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 23:16:11,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 23:16:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:16:11,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:11,271 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:11,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:16:11,272 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:11,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1312408237, now seen corresponding path program 8 times [2021-05-02 23:16:11,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:11,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375510350] [2021-05-02 23:16:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:11,282 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:11,284 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,438 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 23:16:11,438 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:11,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375510350] [2021-05-02 23:16:11,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375510350] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:11,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:11,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:11,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364401511] [2021-05-02 23:16:11,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:11,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:11,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:11,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:11,440 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:11,506 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 23:16:11,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:11,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 23:16:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:11,516 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:16:11,516 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:16:11,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:16:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 23:16:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 23:16:11,520 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 23:16:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:11,520 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 23:16:11,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 23:16:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:16:11,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:11,521 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:11,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:16:11,521 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:11,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1958176399, now seen corresponding path program 9 times [2021-05-02 23:16:11,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:11,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740216526] [2021-05-02 23:16:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:11,526 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:11,527 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,672 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 23:16:11,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:11,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740216526] [2021-05-02 23:16:11,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [740216526] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:11,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:11,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:11,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813700981] [2021-05-02 23:16:11,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:11,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:11,674 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:11,766 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 23:16:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:11,766 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 23:16:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:11,768 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:16:11,769 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:16:11,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:16:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 23:16:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 23:16:11,774 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 23:16:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:11,774 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 23:16:11,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 23:16:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 23:16:11,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:11,775 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:11,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:16:11,775 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:11,776 INFO L82 PathProgramCache]: Analyzing trace with hash -228877839, now seen corresponding path program 10 times [2021-05-02 23:16:11,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:11,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401281224] [2021-05-02 23:16:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:11,780 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:11,782 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,912 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 23:16:11,912 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:11,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401281224] [2021-05-02 23:16:11,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [401281224] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:11,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:11,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:11,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090606218] [2021-05-02 23:16:11,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:11,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:11,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:11,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:11,914 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,001 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 23:16:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 23:16:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,007 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:16:12,007 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 23:16:12,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 23:16:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 23:16:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 23:16:12,018 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 23:16:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,019 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 23:16:12,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 23:16:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 23:16:12,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,019 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:16:12,020 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1748992813, now seen corresponding path program 11 times [2021-05-02 23:16:12,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289538527] [2021-05-02 23:16:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,029 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,032 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,227 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 23:16:12,228 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:12,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289538527] [2021-05-02 23:16:12,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [289538527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:12,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:12,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:16:12,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715774626] [2021-05-02 23:16:12,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:16:12,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:12,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:16:12,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:12,230 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,320 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 23:16:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:12,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 23:16:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,322 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:16:12,322 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 23:16:12,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 23:16:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 23:16:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 23:16:12,327 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 23:16:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,328 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 23:16:12,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 23:16:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:16:12,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,329 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:16:12,329 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2004365109, now seen corresponding path program 12 times [2021-05-02 23:16:12,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138550202] [2021-05-02 23:16:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,359 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,361 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,596 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 23:16:12,596 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:12,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138550202] [2021-05-02 23:16:12,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2138550202] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:12,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:12,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:12,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350699440] [2021-05-02 23:16:12,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:12,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:12,602 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,682 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 23:16:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:12,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 23:16:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,685 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:16:12,685 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 23:16:12,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 23:16:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 23:16:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 23:16:12,695 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 23:16:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,695 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 23:16:12,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 23:16:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:16:12,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,698 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:16:12,699 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1208799511, now seen corresponding path program 13 times [2021-05-02 23:16:12,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97234758] [2021-05-02 23:16:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,704 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,706 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,913 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 23:16:12,913 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:12,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97234758] [2021-05-02 23:16:12,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [97234758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:12,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:12,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:16:12,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761153322] [2021-05-02 23:16:12,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:16:12,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:12,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:16:12,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:12,916 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,996 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 23:16:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:16:12,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 23:16:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,998 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:16:12,998 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 23:16:13,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 23:16:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 23:16:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 23:16:13,021 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 23:16:13,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:13,021 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 23:16:13,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 23:16:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:16:13,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,022 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:16:13,022 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1174438521, now seen corresponding path program 14 times [2021-05-02 23:16:13,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592821596] [2021-05-02 23:16:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,029 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:13,030 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,280 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 23:16:13,280 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:13,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592821596] [2021-05-02 23:16:13,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592821596] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:13,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:13,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:13,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469261463] [2021-05-02 23:16:13,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:13,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:13,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:13,282 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:13,373 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 23:16:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 23:16:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:13,374 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:16:13,374 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:16:13,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:16:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 23:16:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 23:16:13,379 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 23:16:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:13,379 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 23:16:13,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 23:16:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:16:13,380 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,380 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:16:13,381 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1781701797, now seen corresponding path program 15 times [2021-05-02 23:16:13,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310829206] [2021-05-02 23:16:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,385 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:13,386 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,613 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 23:16:13,614 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:13,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310829206] [2021-05-02 23:16:13,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310829206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:13,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:13,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:16:13,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280214627] [2021-05-02 23:16:13,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:16:13,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:13,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:16:13,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:13,616 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:13,686 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 23:16:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:13,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 23:16:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:13,688 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:16:13,688 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 23:16:13,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 23:16:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 23:16:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 23:16:13,697 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 23:16:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:13,697 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 23:16:13,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,697 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 23:16:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:16:13,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,700 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:16:13,700 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,701 INFO L82 PathProgramCache]: Analyzing trace with hash 635802557, now seen corresponding path program 16 times [2021-05-02 23:16:13,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290636288] [2021-05-02 23:16:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,710 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:13,712 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,962 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 23:16:13,963 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:13,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290636288] [2021-05-02 23:16:13,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [290636288] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:13,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:13,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:16:13,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533202980] [2021-05-02 23:16:13,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:16:13,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:16:13,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:13,965 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,085 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 23:16:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:16:14,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 23:16:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,086 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:16:14,086 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 23:16:14,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 23:16:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-02 23:16:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 23:16:14,091 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 23:16:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,091 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 23:16:14,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 23:16:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:16:14,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,093 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:16:14,093 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,093 INFO L82 PathProgramCache]: Analyzing trace with hash 280179615, now seen corresponding path program 17 times [2021-05-02 23:16:14,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628906441] [2021-05-02 23:16:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,099 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,101 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,356 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 23:16:14,356 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628906441] [2021-05-02 23:16:14,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [628906441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:16:14,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073112616] [2021-05-02 23:16:14,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:16:14,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:16:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:14,358 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,460 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 23:16:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:16:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 23:16:14,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,466 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:16:14,466 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 23:16:14,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 23:16:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 23:16:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 23:16:14,471 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 23:16:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,471 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 23:16:14,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 23:16:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:16:14,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,475 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:16:14,475 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2123916033, now seen corresponding path program 18 times [2021-05-02 23:16:14,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037907066] [2021-05-02 23:16:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,483 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,485 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,796 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 23:16:14,796 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037907066] [2021-05-02 23:16:14,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037907066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:16:14,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369613203] [2021-05-02 23:16:14,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:16:14,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:16:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:14,798 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,894 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 23:16:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:16:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 23:16:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,895 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:16:14,895 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 23:16:14,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 23:16:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 23:16:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 23:16:14,898 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 23:16:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,899 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 23:16:14,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 23:16:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:16:14,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,899 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:16:14,900 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,900 INFO L82 PathProgramCache]: Analyzing trace with hash 133120483, now seen corresponding path program 19 times [2021-05-02 23:16:14,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204504339] [2021-05-02 23:16:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,905 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,906 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,200 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 23:16:15,200 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204504339] [2021-05-02 23:16:15,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [204504339] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:16:15,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361534882] [2021-05-02 23:16:15,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:16:15,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:16:15,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:15,202 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,324 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 23:16:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:16:15,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 23:16:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,327 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:16:15,327 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 23:16:15,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 23:16:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 23:16:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 23:16:15,335 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 23:16:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,336 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 23:16:15,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 23:16:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:16:15,340 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,340 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:16:15,341 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1760956347, now seen corresponding path program 20 times [2021-05-02 23:16:15,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975642809] [2021-05-02 23:16:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,346 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,348 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,650 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 23:16:15,651 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975642809] [2021-05-02 23:16:15,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975642809] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:16:15,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763219903] [2021-05-02 23:16:15,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:16:15,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:16:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:15,652 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,771 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 23:16:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:16:15,777 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 23:16:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,778 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:16:15,778 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 23:16:15,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 23:16:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 23:16:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 23:16:15,792 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 23:16:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,792 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 23:16:15,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 23:16:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:16:15,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,793 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:16:15,793 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash -902656473, now seen corresponding path program 21 times [2021-05-02 23:16:15,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162313916] [2021-05-02 23:16:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,803 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,804 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,116 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 23:16:16,117 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162313916] [2021-05-02 23:16:16,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [162313916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:16:16,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715791652] [2021-05-02 23:16:16,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:16:16,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:16:16,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:16,119 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:16,193 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 23:16:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:16:16,193 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 23:16:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:16,194 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:16:16,194 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 23:16:16,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 23:16:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 23:16:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 23:16:16,198 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 23:16:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:16,198 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 23:16:16,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 23:16:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:16:16,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:16,199 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:16,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:16:16,199 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:16,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash -710198391, now seen corresponding path program 22 times [2021-05-02 23:16:16,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:16,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383896193] [2021-05-02 23:16:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:16,207 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:16,208 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,557 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 23:16:16,557 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383896193] [2021-05-02 23:16:16,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1383896193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:16:16,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521089900] [2021-05-02 23:16:16,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:16:16,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:16:16,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:16,560 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:16,679 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 23:16:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:16:16,680 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-02 23:16:16,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:16,681 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:16:16,681 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 23:16:16,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 23:16:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 23:16:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 23:16:16,685 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 23:16:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:16,686 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 23:16:16,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 23:16:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:16:16,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:16,686 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:16,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:16:16,687 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash -441575317, now seen corresponding path program 23 times [2021-05-02 23:16:16,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:16,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96723077] [2021-05-02 23:16:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:16,692 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:16,693 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,085 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 23:16:17,085 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96723077] [2021-05-02 23:16:17,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [96723077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:16:17,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001134782] [2021-05-02 23:16:17,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:16:17,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:16:17,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:17,087 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,193 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 23:16:17,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:16:17,193 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 23:16:17,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,194 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:16:17,194 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 23:16:17,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 23:16:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 23:16:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 23:16:17,199 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 23:16:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,199 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 23:16:17,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 23:16:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:16:17,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,200 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:16:17,201 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash 7161037, now seen corresponding path program 24 times [2021-05-02 23:16:17,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044259870] [2021-05-02 23:16:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,212 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,214 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,652 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 23:16:17,653 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044259870] [2021-05-02 23:16:17,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044259870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:16:17,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144915258] [2021-05-02 23:16:17,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:16:17,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:16:17,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:17,660 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,805 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 23:16:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:16:17,805 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 23:16:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,806 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:16:17,806 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 23:16:17,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 23:16:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 23:16:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 23:16:17,811 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 23:16:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,811 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 23:16:17,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 23:16:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:16:17,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,812 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:16:17,813 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1746067631, now seen corresponding path program 25 times [2021-05-02 23:16:17,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756967586] [2021-05-02 23:16:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,819 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,820 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,224 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 23:16:18,224 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756967586] [2021-05-02 23:16:18,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [756967586] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:16:18,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118182750] [2021-05-02 23:16:18,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:16:18,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:16:18,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:18,226 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,356 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 23:16:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:16:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-02 23:16:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,358 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:16:18,358 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 23:16:18,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 23:16:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 23:16:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 23:16:18,363 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 23:16:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,363 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 23:16:18,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 23:16:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:16:18,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,364 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:16:18,364 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2093026321, now seen corresponding path program 26 times [2021-05-02 23:16:18,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557571261] [2021-05-02 23:16:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,370 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,372 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,858 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 23:16:18,858 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557571261] [2021-05-02 23:16:18,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [557571261] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:16:18,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129109415] [2021-05-02 23:16:18,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:16:18,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:16:18,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:18,860 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,959 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 23:16:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:16:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-02 23:16:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,962 INFO L225 Difference]: With dead ends: 74 [2021-05-02 23:16:18,962 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 23:16:18,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 23:16:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 23:16:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 23:16:18,966 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 23:16:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,966 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 23:16:18,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 23:16:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:16:18,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,967 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:16:18,967 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash 512878323, now seen corresponding path program 27 times [2021-05-02 23:16:18,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081830323] [2021-05-02 23:16:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,972 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,973 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:19,436 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081830323] [2021-05-02 23:16:19,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081830323] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:16:19,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22559740] [2021-05-02 23:16:19,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:16:19,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:16:19,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:19,439 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,544 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 23:16:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:16:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-02 23:16:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,546 INFO L225 Difference]: With dead ends: 76 [2021-05-02 23:16:19,546 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 23:16:19,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 23:16:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 23:16:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 23:16:19,552 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 23:16:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,552 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 23:16:19,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 23:16:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:16:19,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,553 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:16:19,553 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1885892267, now seen corresponding path program 28 times [2021-05-02 23:16:19,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372149235] [2021-05-02 23:16:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,559 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,560 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,115 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 23:16:20,115 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372149235] [2021-05-02 23:16:20,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [372149235] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:16:20,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772911948] [2021-05-02 23:16:20,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:16:20,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:16:20,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:20,117 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,229 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 23:16:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:16:20,230 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-02 23:16:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,231 INFO L225 Difference]: With dead ends: 78 [2021-05-02 23:16:20,231 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 23:16:20,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:20,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 23:16:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 23:16:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 23:16:20,237 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 23:16:20,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,237 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 23:16:20,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 23:16:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:16:20,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,238 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:16:20,238 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash -706991305, now seen corresponding path program 29 times [2021-05-02 23:16:20,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370849359] [2021-05-02 23:16:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:20,244 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:20,245 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,777 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 23:16:20,777 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370849359] [2021-05-02 23:16:20,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370849359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:16:20,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577917109] [2021-05-02 23:16:20,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:16:20,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:16:20,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:20,781 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,916 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 23:16:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:16:20,917 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 23:16:20,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,918 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:16:20,918 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 23:16:20,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:20,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 23:16:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 23:16:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 23:16:20,922 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 23:16:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,923 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 23:16:20,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 23:16:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:16:20,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,923 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:16:20,924 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1654532967, now seen corresponding path program 30 times [2021-05-02 23:16:20,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827555098] [2021-05-02 23:16:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:20,930 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:20,932 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,486 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 23:16:21,487 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:21,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827555098] [2021-05-02 23:16:21,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1827555098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:21,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:21,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:16:21,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043087591] [2021-05-02 23:16:21,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:16:21,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:16:21,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:21,490 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:21,686 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 23:16:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:16:21,687 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 23:16:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:21,687 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:16:21,687 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 23:16:21,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 23:16:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 23:16:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 23:16:21,692 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 23:16:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:21,692 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 23:16:21,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 23:16:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:16:21,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:21,694 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:21,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:16:21,694 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:21,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:21,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1709003397, now seen corresponding path program 31 times [2021-05-02 23:16:21,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:21,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314960161] [2021-05-02 23:16:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,699 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,701 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,298 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 23:16:22,299 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314960161] [2021-05-02 23:16:22,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [314960161] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:16:22,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471408723] [2021-05-02 23:16:22,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:16:22,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:16:22,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:22,301 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:22,417 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 23:16:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:16:22,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 23:16:22,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:22,419 INFO L225 Difference]: With dead ends: 84 [2021-05-02 23:16:22,419 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 23:16:22,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 540.2ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 23:16:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 23:16:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 23:16:22,425 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 23:16:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:22,425 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 23:16:22,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 23:16:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 23:16:22,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:22,426 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:22,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:16:22,426 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1779488221, now seen corresponding path program 32 times [2021-05-02 23:16:22,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:22,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056852525] [2021-05-02 23:16:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:22,432 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:22,433 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,056 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 23:16:23,057 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056852525] [2021-05-02 23:16:23,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1056852525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:23,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:23,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:16:23,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482294782] [2021-05-02 23:16:23,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:16:23,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:16:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:23,059 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,227 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 23:16:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:16:23,228 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 23:16:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,229 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:16:23,229 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 23:16:23,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 23:16:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 23:16:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 23:16:23,236 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 23:16:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,237 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 23:16:23,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 23:16:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:16:23,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,238 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:16:23,238 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,239 INFO L82 PathProgramCache]: Analyzing trace with hash -149525057, now seen corresponding path program 33 times [2021-05-02 23:16:23,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117264213] [2021-05-02 23:16:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:23,248 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:23,251 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,859 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 23:16:23,859 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:23,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117264213] [2021-05-02 23:16:23,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [117264213] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:23,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:23,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:16:23,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328733547] [2021-05-02 23:16:23,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:16:23,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:16:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:23,861 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:24,046 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 23:16:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:16:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 23:16:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:24,048 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:16:24,048 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 23:16:24,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 23:16:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 23:16:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 23:16:24,054 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 23:16:24,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:24,054 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 23:16:24,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 23:16:24,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:16:24,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:24,055 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:24,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:16:24,055 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:24,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1494586657, now seen corresponding path program 34 times [2021-05-02 23:16:24,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:24,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800706621] [2021-05-02 23:16:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:24,061 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:24,062 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,682 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 23:16:24,683 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:24,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800706621] [2021-05-02 23:16:24,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [800706621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:24,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:24,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:16:24,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822009949] [2021-05-02 23:16:24,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:16:24,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:24,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:16:24,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:24,684 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:24,897 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 23:16:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:16:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-02 23:16:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:24,898 INFO L225 Difference]: With dead ends: 90 [2021-05-02 23:16:24,899 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 23:16:24,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 563.1ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:24,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 23:16:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-02 23:16:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 23:16:24,903 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 23:16:24,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:24,904 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 23:16:24,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 23:16:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 23:16:24,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:24,905 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:24,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:16:24,905 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:24,905 INFO L82 PathProgramCache]: Analyzing trace with hash 937978883, now seen corresponding path program 35 times [2021-05-02 23:16:24,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:24,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145923413] [2021-05-02 23:16:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:24,910 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:24,911 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,566 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 23:16:25,566 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:25,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145923413] [2021-05-02 23:16:25,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145923413] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:25,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:25,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:16:25,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386653526] [2021-05-02 23:16:25,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:16:25,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:16:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:25,568 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:25,803 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 23:16:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:16:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 23:16:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:25,804 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:16:25,805 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 23:16:25,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 600.0ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 23:16:25,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 23:16:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 23:16:25,813 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 23:16:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:25,813 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 23:16:25,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 23:16:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 23:16:25,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:25,814 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:25,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:16:25,814 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:25,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1386147227, now seen corresponding path program 36 times [2021-05-02 23:16:25,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:25,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471323030] [2021-05-02 23:16:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:25,821 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:25,822 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,525 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 23:16:26,525 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:26,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471323030] [2021-05-02 23:16:26,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471323030] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:26,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:26,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:16:26,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924564612] [2021-05-02 23:16:26,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:16:26,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:16:26,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:26,528 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:26,724 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 23:16:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:16:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-02 23:16:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:26,725 INFO L225 Difference]: With dead ends: 94 [2021-05-02 23:16:26,725 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 23:16:26,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:26,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 23:16:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 23:16:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 23:16:26,730 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 23:16:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:26,730 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 23:16:26,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 23:16:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:16:26,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:26,731 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:26,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:16:26,732 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:26,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:26,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1488345017, now seen corresponding path program 37 times [2021-05-02 23:16:26,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:26,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976416680] [2021-05-02 23:16:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:26,737 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:26,738 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,438 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 23:16:27,438 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:27,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976416680] [2021-05-02 23:16:27,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1976416680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:27,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:27,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:16:27,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198719933] [2021-05-02 23:16:27,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:16:27,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:16:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:27,440 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:27,562 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 23:16:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:16:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-02 23:16:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:27,563 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:16:27,563 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 23:16:27,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 23:16:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 23:16:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 23:16:27,567 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 23:16:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:27,567 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 23:16:27,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 23:16:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 23:16:27,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:27,568 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:27,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:16:27,568 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:27,568 INFO L82 PathProgramCache]: Analyzing trace with hash -916173399, now seen corresponding path program 38 times [2021-05-02 23:16:27,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:27,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131958731] [2021-05-02 23:16:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:27,576 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:27,577 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,296 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 23:16:28,296 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:28,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131958731] [2021-05-02 23:16:28,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131958731] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:28,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:28,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:16:28,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897343741] [2021-05-02 23:16:28,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:16:28,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:16:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:28,298 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:28,498 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 23:16:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:16:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-02 23:16:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:28,499 INFO L225 Difference]: With dead ends: 98 [2021-05-02 23:16:28,499 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 23:16:28,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 642.7ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 23:16:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 23:16:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 23:16:28,503 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 23:16:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:28,503 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 23:16:28,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 23:16:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:16:28,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:28,504 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:28,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:16:28,504 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:28,505 INFO L82 PathProgramCache]: Analyzing trace with hash -815062389, now seen corresponding path program 39 times [2021-05-02 23:16:28,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:28,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617524564] [2021-05-02 23:16:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:28,508 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:28,509 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:29,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:29,249 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 23:16:29,249 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:29,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617524564] [2021-05-02 23:16:29,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617524564] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:29,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:29,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:16:29,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141923839] [2021-05-02 23:16:29,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:16:29,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:29,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:16:29,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:29,251 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:29,392 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 23:16:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:16:29,393 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-02 23:16:29,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:29,393 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:16:29,393 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 23:16:29,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 667.4ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 23:16:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 23:16:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 23:16:29,400 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 23:16:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:29,400 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 23:16:29,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 23:16:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:16:29,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:29,401 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:29,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:16:29,401 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1863337709, now seen corresponding path program 40 times [2021-05-02 23:16:29,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:29,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117453890] [2021-05-02 23:16:29,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:29,407 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:29,411 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,209 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 23:16:30,209 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:30,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117453890] [2021-05-02 23:16:30,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [117453890] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:30,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:30,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:16:30,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313030998] [2021-05-02 23:16:30,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:16:30,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:30,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:16:30,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:30,211 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:30,329 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 23:16:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:16:30,330 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-02 23:16:30,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:30,331 INFO L225 Difference]: With dead ends: 102 [2021-05-02 23:16:30,331 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 23:16:30,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 722.2ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 23:16:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-02 23:16:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 23:16:30,339 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 23:16:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:30,339 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 23:16:30,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 23:16:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 23:16:30,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:30,341 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:30,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:16:30,341 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:30,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:30,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1174545713, now seen corresponding path program 41 times [2021-05-02 23:16:30,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:30,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995867997] [2021-05-02 23:16:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:30,347 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:30,349 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,186 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 23:16:31,186 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995867997] [2021-05-02 23:16:31,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995867997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:16:31,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236020297] [2021-05-02 23:16:31,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:16:31,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:16:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:31,188 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,390 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 23:16:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:16:31,390 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 23:16:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,391 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:16:31,391 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 23:16:31,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 765.1ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 23:16:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 23:16:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 23:16:31,398 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 23:16:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,400 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 23:16:31,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 23:16:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 23:16:31,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,400 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:16:31,401 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2752975, now seen corresponding path program 42 times [2021-05-02 23:16:31,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052568857] [2021-05-02 23:16:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,405 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,406 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,304 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 23:16:32,305 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052568857] [2021-05-02 23:16:32,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052568857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:16:32,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635033588] [2021-05-02 23:16:32,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:16:32,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:16:32,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:32,306 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,530 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 23:16:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:16:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 23:16:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,531 INFO L225 Difference]: With dead ends: 106 [2021-05-02 23:16:32,531 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 23:16:32,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 23:16:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 23:16:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 23:16:32,535 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 23:16:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,536 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 23:16:32,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 23:16:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 23:16:32,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,536 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:16:32,537 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash 808636691, now seen corresponding path program 43 times [2021-05-02 23:16:32,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940395801] [2021-05-02 23:16:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,542 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,543 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,413 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 23:16:33,413 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940395801] [2021-05-02 23:16:33,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1940395801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:16:33,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988803054] [2021-05-02 23:16:33,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:16:33,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:16:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:33,415 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,563 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 23:16:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:16:33,563 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-02 23:16:33,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,564 INFO L225 Difference]: With dead ends: 108 [2021-05-02 23:16:33,564 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 23:16:33,565 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 811.6ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 23:16:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 23:16:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 23:16:33,569 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 23:16:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,569 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 23:16:33,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 23:16:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 23:16:33,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,570 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:16:33,570 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1129942155, now seen corresponding path program 44 times [2021-05-02 23:16:33,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175980053] [2021-05-02 23:16:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,579 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,580 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,498 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 23:16:34,498 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175980053] [2021-05-02 23:16:34,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [175980053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:16:34,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917719960] [2021-05-02 23:16:34,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:16:34,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:16:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:34,500 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,672 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 23:16:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:16:34,673 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 23:16:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,674 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:16:34,674 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:16:34,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 850.2ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:16:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 23:16:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 23:16:34,678 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 23:16:34,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,678 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 23:16:34,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 23:16:34,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:34,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,679 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:16:34,679 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,679 INFO L82 PathProgramCache]: Analyzing trace with hash -88406697, now seen corresponding path program 45 times [2021-05-02 23:16:34,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952726723] [2021-05-02 23:16:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,686 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,687 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,718 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 23:16:35,718 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952726723] [2021-05-02 23:16:35,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952726723] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:16:35,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481606912] [2021-05-02 23:16:35,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:16:35,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:16:35,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:35,720 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,943 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 23:16:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:16:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,945 INFO L225 Difference]: With dead ends: 112 [2021-05-02 23:16:35,945 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 23:16:35,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 968.7ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 23:16:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 23:16:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 23:16:35,949 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 23:16:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,949 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 23:16:35,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 23:16:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 23:16:35,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,950 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:16:35,950 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash 99788473, now seen corresponding path program 46 times [2021-05-02 23:16:35,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685322250] [2021-05-02 23:16:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,961 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,962 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,949 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 23:16:36,949 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:36,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685322250] [2021-05-02 23:16:36,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1685322250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:36,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:36,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:16:36,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310924387] [2021-05-02 23:16:36,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:16:36,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:36,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:16:36,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:36,951 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,150 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 23:16:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:16:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-02 23:16:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,151 INFO L225 Difference]: With dead ends: 114 [2021-05-02 23:16:37,152 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 23:16:37,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 907.9ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 23:16:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 23:16:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 23:16:37,181 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 23:16:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,182 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 23:16:37,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 23:16:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 23:16:37,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,182 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:16:37,182 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,183 INFO L82 PathProgramCache]: Analyzing trace with hash 566720411, now seen corresponding path program 47 times [2021-05-02 23:16:37,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494884122] [2021-05-02 23:16:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,216 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,217 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,390 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 23:16:38,390 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:38,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494884122] [2021-05-02 23:16:38,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494884122] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:38,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:38,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:16:38,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899530395] [2021-05-02 23:16:38,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:16:38,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:38,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:16:38,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:38,392 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:38,569 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 23:16:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:16:38,570 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-02 23:16:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:38,570 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:16:38,570 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 23:16:38,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1082.6ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 23:16:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 23:16:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 23:16:38,574 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 23:16:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:38,575 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 23:16:38,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:38,576 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 23:16:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 23:16:38,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:38,576 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:38,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:16:38,576 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:38,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1683253251, now seen corresponding path program 48 times [2021-05-02 23:16:38,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:38,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379033068] [2021-05-02 23:16:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:38,581 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:38,582 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:39,639 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 23:16:39,639 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:39,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379033068] [2021-05-02 23:16:39,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379033068] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:39,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:39,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:16:39,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546062874] [2021-05-02 23:16:39,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:16:39,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:16:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:16:39,641 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:39,796 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 23:16:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:16:39,796 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-02 23:16:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:39,797 INFO L225 Difference]: With dead ends: 118 [2021-05-02 23:16:39,797 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 23:16:39,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 984.6ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:16:39,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 23:16:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 23:16:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 23:16:39,801 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 23:16:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,801 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 23:16:39,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 23:16:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 23:16:39,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,802 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:16:39,802 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,803 INFO L82 PathProgramCache]: Analyzing trace with hash 755574751, now seen corresponding path program 49 times [2021-05-02 23:16:39,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212155266] [2021-05-02 23:16:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,806 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,807 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,928 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 23:16:40,928 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:40,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212155266] [2021-05-02 23:16:40,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1212155266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:40,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:40,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:16:40,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131301610] [2021-05-02 23:16:40,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:16:40,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:40,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:16:40,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:16:40,930 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:41,067 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 23:16:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:16:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-02 23:16:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:41,068 INFO L225 Difference]: With dead ends: 120 [2021-05-02 23:16:41,068 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 23:16:41,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1046.1ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:16:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 23:16:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 23:16:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 23:16:41,072 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 23:16:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:41,072 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 23:16:41,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 23:16:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 23:16:41,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:41,073 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:41,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:16:41,073 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash -582858943, now seen corresponding path program 50 times [2021-05-02 23:16:41,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:41,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569201171] [2021-05-02 23:16:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:41,078 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:41,078 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,213 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 23:16:42,213 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:42,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569201171] [2021-05-02 23:16:42,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569201171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:42,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:42,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:16:42,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431142171] [2021-05-02 23:16:42,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:16:42,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:42,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:16:42,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:16:42,215 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:42,388 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 23:16:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:16:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-02 23:16:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:42,390 INFO L225 Difference]: With dead ends: 122 [2021-05-02 23:16:42,390 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 23:16:42,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1067.4ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:16:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 23:16:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 23:16:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 23:16:42,400 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 23:16:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:42,400 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 23:16:42,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 23:16:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:16:42,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:42,401 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:42,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:16:42,401 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1672549923, now seen corresponding path program 51 times [2021-05-02 23:16:42,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:42,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056145612] [2021-05-02 23:16:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:42,405 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:42,406 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,592 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 23:16:43,592 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:43,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056145612] [2021-05-02 23:16:43,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1056145612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:43,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:43,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:16:43,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041145465] [2021-05-02 23:16:43,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:16:43,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:43,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:16:43,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:16:43,594 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:43,809 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 23:16:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:16:43,809 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 23:16:43,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:43,810 INFO L225 Difference]: With dead ends: 124 [2021-05-02 23:16:43,810 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 23:16:43,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1119.0ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:16:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 23:16:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-02 23:16:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-02 23:16:43,814 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-02 23:16:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:43,814 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-02 23:16:43,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-02 23:16:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 23:16:43,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:43,815 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:43,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:16:43,816 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:43,816 INFO L82 PathProgramCache]: Analyzing trace with hash 161985669, now seen corresponding path program 52 times [2021-05-02 23:16:43,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:43,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389738046] [2021-05-02 23:16:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:43,820 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:43,821 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,062 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 23:16:45,062 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:45,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389738046] [2021-05-02 23:16:45,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [389738046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:45,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:45,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:16:45,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862638847] [2021-05-02 23:16:45,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:16:45,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:16:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:16:45,063 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:45,283 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 23:16:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:16:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-05-02 23:16:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:45,285 INFO L225 Difference]: With dead ends: 126 [2021-05-02 23:16:45,285 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 23:16:45,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1174.4ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:16:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 23:16:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-02 23:16:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-02 23:16:45,289 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-02 23:16:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:45,289 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-02 23:16:45,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,289 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-02 23:16:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 23:16:45,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:45,290 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:45,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:16:45,290 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 208683623, now seen corresponding path program 53 times [2021-05-02 23:16:45,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:45,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242592526] [2021-05-02 23:16:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:45,296 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:45,297 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,565 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 23:16:46,565 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:46,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242592526] [2021-05-02 23:16:46,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242592526] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:46,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:46,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:16:46,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638717211] [2021-05-02 23:16:46,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:16:46,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:46,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:16:46,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:16:46,567 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:46,800 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 23:16:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:16:46,800 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-02 23:16:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:46,801 INFO L225 Difference]: With dead ends: 128 [2021-05-02 23:16:46,801 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 23:16:46,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1210.2ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:16:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 23:16:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-02 23:16:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-02 23:16:46,804 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-02 23:16:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:46,804 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-02 23:16:46,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-02 23:16:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 23:16:46,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:46,805 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:46,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:16:46,805 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2135744457, now seen corresponding path program 54 times [2021-05-02 23:16:46,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:46,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323971829] [2021-05-02 23:16:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:46,810 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:46,811 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,144 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 23:16:48,145 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:48,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323971829] [2021-05-02 23:16:48,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [323971829] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:48,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:48,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:16:48,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460259772] [2021-05-02 23:16:48,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:16:48,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:48,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:16:48,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:16:48,146 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:48,331 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 23:16:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:16:48,333 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-02 23:16:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:48,334 INFO L225 Difference]: With dead ends: 130 [2021-05-02 23:16:48,334 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 23:16:48,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1264.7ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:16:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 23:16:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-02 23:16:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-02 23:16:48,337 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-02 23:16:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:48,338 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-02 23:16:48,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-02 23:16:48,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 23:16:48,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:48,338 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:48,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:16:48,339 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:48,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1384665941, now seen corresponding path program 55 times [2021-05-02 23:16:48,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:48,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044054481] [2021-05-02 23:16:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:48,343 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:48,344 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:49,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:49,730 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 23:16:49,731 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:49,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044054481] [2021-05-02 23:16:49,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044054481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:49,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:49,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:16:49,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170006693] [2021-05-02 23:16:49,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:16:49,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:49,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:16:49,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:16:49,732 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:49,967 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 23:16:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:16:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-02 23:16:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:49,968 INFO L225 Difference]: With dead ends: 132 [2021-05-02 23:16:49,968 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 23:16:49,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1322.8ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:16:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 23:16:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-02 23:16:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-02 23:16:49,971 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-02 23:16:49,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:49,971 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-02 23:16:49,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-02 23:16:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 23:16:49,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:49,972 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:49,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:16:49,972 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:49,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:49,973 INFO L82 PathProgramCache]: Analyzing trace with hash -64829171, now seen corresponding path program 56 times [2021-05-02 23:16:49,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:49,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850750148] [2021-05-02 23:16:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:49,976 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:49,976 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,361 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 23:16:51,361 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:51,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850750148] [2021-05-02 23:16:51,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1850750148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:51,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:51,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:16:51,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469318146] [2021-05-02 23:16:51,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:16:51,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:16:51,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:16:51,363 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:51,532 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-02 23:16:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:16:51,533 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-02 23:16:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:51,533 INFO L225 Difference]: With dead ends: 134 [2021-05-02 23:16:51,533 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 23:16:51,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1322.4ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:16:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 23:16:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-02 23:16:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-02 23:16:51,537 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-02 23:16:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:51,537 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-02 23:16:51,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-02 23:16:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 23:16:51,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:51,538 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:51,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:16:51,538 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:51,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:51,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1282954479, now seen corresponding path program 57 times [2021-05-02 23:16:51,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:51,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89076614] [2021-05-02 23:16:51,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:51,542 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:51,543 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:52,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:52,962 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:52,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89076614] [2021-05-02 23:16:52,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [89076614] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:52,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:52,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:16:52,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809315559] [2021-05-02 23:16:52,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:16:52,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:52,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:16:52,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:16:52,963 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:53,210 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-02 23:16:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:16:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-02 23:16:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:53,211 INFO L225 Difference]: With dead ends: 136 [2021-05-02 23:16:53,211 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 23:16:53,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1354.2ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:16:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 23:16:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-02 23:16:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-02 23:16:53,214 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-02 23:16:53,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:53,214 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-02 23:16:53,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,214 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-02 23:16:53,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 23:16:53,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:53,215 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:53,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:16:53,215 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:53,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:53,215 INFO L82 PathProgramCache]: Analyzing trace with hash -577081263, now seen corresponding path program 58 times [2021-05-02 23:16:53,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:53,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173530813] [2021-05-02 23:16:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:53,218 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:53,219 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,765 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 23:16:54,765 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:54,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173530813] [2021-05-02 23:16:54,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [173530813] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:54,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:54,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:16:54,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284549369] [2021-05-02 23:16:54,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:16:54,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:54,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:16:54,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:16:54,767 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:55,030 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-02 23:16:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:16:55,031 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-02 23:16:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:55,031 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:16:55,031 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 23:16:55,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1467.7ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:16:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 23:16:55,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-02 23:16:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-02 23:16:55,034 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-02 23:16:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:55,035 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-02 23:16:55,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,035 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-02 23:16:55,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 23:16:55,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:55,035 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:55,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:16:55,035 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:55,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:55,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1365034189, now seen corresponding path program 59 times [2021-05-02 23:16:55,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:55,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143405997] [2021-05-02 23:16:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:55,051 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:55,052 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,613 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 23:16:56,613 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:56,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143405997] [2021-05-02 23:16:56,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [143405997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:56,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:56,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:16:56,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565622209] [2021-05-02 23:16:56,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:16:56,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:56,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:16:56,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:16:56,615 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:56,781 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-02 23:16:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:16:56,782 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-02 23:16:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:56,783 INFO L225 Difference]: With dead ends: 140 [2021-05-02 23:16:56,783 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 23:16:56,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1483.1ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:16:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 23:16:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-05-02 23:16:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-05-02 23:16:56,786 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-05-02 23:16:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:56,786 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-05-02 23:16:56,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-05-02 23:16:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 23:16:56,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:56,787 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:56,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:16:56,787 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:56,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:56,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1621415317, now seen corresponding path program 60 times [2021-05-02 23:16:56,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:56,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251555831] [2021-05-02 23:16:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:56,791 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:56,792 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,356 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 23:16:58,356 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:58,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251555831] [2021-05-02 23:16:58,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [251555831] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:58,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:58,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:16:58,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944382058] [2021-05-02 23:16:58,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:16:58,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:58,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:16:58,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:16:58,357 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:58,647 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-02 23:16:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:16:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2021-05-02 23:16:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:58,648 INFO L225 Difference]: With dead ends: 142 [2021-05-02 23:16:58,648 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 23:16:58,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1493.7ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:16:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 23:16:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-05-02 23:16:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-05-02 23:16:58,652 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-05-02 23:16:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:58,652 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-05-02 23:16:58,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-05-02 23:16:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 23:16:58,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:58,653 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:58,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:16:58,653 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:58,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:58,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1733730441, now seen corresponding path program 61 times [2021-05-02 23:16:58,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:58,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730654017] [2021-05-02 23:16:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:58,659 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:58,663 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,348 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 23:17:00,348 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730654017] [2021-05-02 23:17:00,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [730654017] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:00,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:00,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:17:00,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585293597] [2021-05-02 23:17:00,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:17:00,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:00,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:17:00,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:00,349 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:00,602 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-02 23:17:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:17:00,603 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-05-02 23:17:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:00,603 INFO L225 Difference]: With dead ends: 144 [2021-05-02 23:17:00,603 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 23:17:00,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1599.9ms TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 23:17:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 23:17:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-05-02 23:17:00,618 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-05-02 23:17:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:00,619 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-05-02 23:17:00,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-05-02 23:17:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 23:17:00,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:00,620 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:00,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:17:00,620 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash -508364583, now seen corresponding path program 62 times [2021-05-02 23:17:00,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:00,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927782013] [2021-05-02 23:17:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:00,624 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:00,624 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:02,317 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 23:17:02,317 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:02,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927782013] [2021-05-02 23:17:02,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [927782013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:02,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:02,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:17:02,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189214107] [2021-05-02 23:17:02,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:17:02,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:02,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:17:02,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:02,318 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:02,617 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-02 23:17:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:17:02,619 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-02 23:17:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:02,620 INFO L225 Difference]: With dead ends: 146 [2021-05-02 23:17:02,620 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 23:17:02,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1621.0ms TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 23:17:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-05-02 23:17:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-05-02 23:17:02,625 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-05-02 23:17:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:02,625 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-05-02 23:17:02,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-05-02 23:17:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 23:17:02,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:02,626 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:02,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:17:02,627 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:02,627 INFO L82 PathProgramCache]: Analyzing trace with hash 247185851, now seen corresponding path program 63 times [2021-05-02 23:17:02,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:02,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683289833] [2021-05-02 23:17:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:02,631 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:02,633 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,375 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 23:17:04,375 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683289833] [2021-05-02 23:17:04,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [683289833] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:04,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:04,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:17:04,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6741004] [2021-05-02 23:17:04,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:17:04,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:04,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:17:04,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:04,376 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:04,697 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-02 23:17:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:17:04,698 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2021-05-02 23:17:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:04,698 INFO L225 Difference]: With dead ends: 148 [2021-05-02 23:17:04,698 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 23:17:04,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1661.8ms TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 23:17:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-05-02 23:17:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-05-02 23:17:04,703 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-05-02 23:17:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:04,703 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-05-02 23:17:04,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-05-02 23:17:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 23:17:04,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:04,704 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:04,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:17:04,704 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:04,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash 481679901, now seen corresponding path program 64 times [2021-05-02 23:17:04,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:04,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501465787] [2021-05-02 23:17:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:04,709 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:04,709 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,489 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 23:17:06,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:06,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501465787] [2021-05-02 23:17:06,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501465787] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:06,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:06,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:17:06,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016884700] [2021-05-02 23:17:06,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:17:06,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:17:06,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:06,491 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:06,764 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-02 23:17:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:17:06,765 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-05-02 23:17:06,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:06,765 INFO L225 Difference]: With dead ends: 150 [2021-05-02 23:17:06,765 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 23:17:06,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1696.3ms TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 23:17:06,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-05-02 23:17:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-05-02 23:17:06,769 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-05-02 23:17:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:06,769 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-05-02 23:17:06,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-05-02 23:17:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 23:17:06,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:06,770 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:06,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:17:06,770 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:06,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:06,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1802804737, now seen corresponding path program 65 times [2021-05-02 23:17:06,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:06,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347992547] [2021-05-02 23:17:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:06,776 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:06,777 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,659 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 23:17:08,659 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:08,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347992547] [2021-05-02 23:17:08,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1347992547] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:08,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:08,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:17:08,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456596861] [2021-05-02 23:17:08,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:17:08,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:08,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:17:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:08,661 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:08,941 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-05-02 23:17:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:17:08,941 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-02 23:17:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:08,942 INFO L225 Difference]: With dead ends: 152 [2021-05-02 23:17:08,942 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 23:17:08,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1810.7ms TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 23:17:08,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-02 23:17:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-05-02 23:17:08,945 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-05-02 23:17:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:08,946 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-05-02 23:17:08,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,946 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-05-02 23:17:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 23:17:08,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:08,946 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:08,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:17:08,947 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1830713697, now seen corresponding path program 66 times [2021-05-02 23:17:08,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:08,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429534085] [2021-05-02 23:17:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:08,951 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:08,951 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,841 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 23:17:10,841 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:10,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429534085] [2021-05-02 23:17:10,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429534085] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:10,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:10,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:17:10,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279049882] [2021-05-02 23:17:10,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:17:10,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:10,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:17:10,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:10,843 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:11,024 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-05-02 23:17:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:17:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-05-02 23:17:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:11,025 INFO L225 Difference]: With dead ends: 154 [2021-05-02 23:17:11,025 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 23:17:11,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1819.0ms TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 23:17:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-05-02 23:17:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-05-02 23:17:11,029 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-05-02 23:17:11,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:11,030 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-05-02 23:17:11,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:11,030 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-05-02 23:17:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 23:17:11,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:11,030 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:11,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:17:11,031 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1833517123, now seen corresponding path program 67 times [2021-05-02 23:17:11,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:11,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076834899] [2021-05-02 23:17:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:11,037 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:11,038 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:13,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:13,014 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 23:17:13,015 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:13,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076834899] [2021-05-02 23:17:13,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076834899] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:13,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:13,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:17:13,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718387620] [2021-05-02 23:17:13,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:17:13,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:13,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:17:13,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:13,016 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:13,325 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-05-02 23:17:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:17:13,326 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-05-02 23:17:13,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:13,327 INFO L225 Difference]: With dead ends: 156 [2021-05-02 23:17:13,327 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 23:17:13,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1903.9ms TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 23:17:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-05-02 23:17:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-05-02 23:17:13,330 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-05-02 23:17:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:13,331 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-05-02 23:17:13,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-05-02 23:17:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 23:17:13,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:13,331 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:13,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:17:13,332 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash 232642213, now seen corresponding path program 68 times [2021-05-02 23:17:13,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:13,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528945468] [2021-05-02 23:17:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:13,335 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:13,336 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,324 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 23:17:15,324 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:15,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528945468] [2021-05-02 23:17:15,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [528945468] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:15,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:15,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:17:15,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708030728] [2021-05-02 23:17:15,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:17:15,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:15,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:17:15,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:15,326 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:15,650 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-05-02 23:17:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:17:15,651 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2021-05-02 23:17:15,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:15,651 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:17:15,651 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 23:17:15,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1906.8ms TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 23:17:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-05-02 23:17:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-05-02 23:17:15,655 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-05-02 23:17:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:15,655 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-05-02 23:17:15,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-05-02 23:17:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 23:17:15,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:15,656 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:15,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:17:15,656 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:15,656 INFO L82 PathProgramCache]: Analyzing trace with hash -609854329, now seen corresponding path program 69 times [2021-05-02 23:17:15,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:15,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635986393] [2021-05-02 23:17:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:15,660 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:15,661 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,682 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 23:17:17,682 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:17,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635986393] [2021-05-02 23:17:17,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [635986393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:17,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:17,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:17:17,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740929582] [2021-05-02 23:17:17,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:17:17,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:17,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:17:17,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:17,683 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:17,880 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-05-02 23:17:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:17:17,881 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2021-05-02 23:17:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:17,882 INFO L225 Difference]: With dead ends: 160 [2021-05-02 23:17:17,882 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 23:17:17,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1948.9ms TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 23:17:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-05-02 23:17:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-05-02 23:17:17,885 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-05-02 23:17:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:17,886 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-05-02 23:17:17,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-05-02 23:17:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-02 23:17:17,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:17,887 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:17,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:17:17,887 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1499787753, now seen corresponding path program 70 times [2021-05-02 23:17:17,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:17,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603902218] [2021-05-02 23:17:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:17,891 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:17,891 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,987 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 23:17:19,987 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:19,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603902218] [2021-05-02 23:17:19,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [603902218] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:19,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:19,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:17:19,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165185334] [2021-05-02 23:17:19,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:17:19,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:17:19,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:19,988 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:20,302 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-05-02 23:17:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:17:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-05-02 23:17:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:20,303 INFO L225 Difference]: With dead ends: 162 [2021-05-02 23:17:20,303 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 23:17:20,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2026.3ms TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 23:17:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-02 23:17:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-05-02 23:17:20,306 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-05-02 23:17:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:20,306 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-05-02 23:17:20,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-05-02 23:17:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 23:17:20,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:20,306 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:20,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:17:20,306 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:20,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1641264843, now seen corresponding path program 71 times [2021-05-02 23:17:20,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:20,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262787911] [2021-05-02 23:17:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:20,309 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:20,310 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:22,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:22,453 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 23:17:22,453 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:22,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262787911] [2021-05-02 23:17:22,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1262787911] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:22,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:22,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:17:22,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386434489] [2021-05-02 23:17:22,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:17:22,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:22,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:17:22,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:22,455 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:22,679 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-05-02 23:17:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:17:22,680 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2021-05-02 23:17:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:22,680 INFO L225 Difference]: With dead ends: 164 [2021-05-02 23:17:22,680 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 23:17:22,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2066.9ms TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 23:17:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-05-02 23:17:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-05-02 23:17:22,684 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-05-02 23:17:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:22,684 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-05-02 23:17:22,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-05-02 23:17:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 23:17:22,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:22,685 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:22,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:17:22,685 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:22,685 INFO L82 PathProgramCache]: Analyzing trace with hash 161794861, now seen corresponding path program 72 times [2021-05-02 23:17:22,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:22,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159259178] [2021-05-02 23:17:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:22,688 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:22,689 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:24,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:24,875 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 23:17:24,875 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:24,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159259178] [2021-05-02 23:17:24,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159259178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:24,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:24,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:17:24,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632195786] [2021-05-02 23:17:24,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:17:24,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:24,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:17:24,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:24,876 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:25,196 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-05-02 23:17:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:17:25,196 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2021-05-02 23:17:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:25,197 INFO L225 Difference]: With dead ends: 166 [2021-05-02 23:17:25,197 INFO L226 Difference]: Without dead ends: 160 [2021-05-02 23:17:25,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2110.8ms TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-02 23:17:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-05-02 23:17:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-05-02 23:17:25,200 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-05-02 23:17:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:25,201 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-05-02 23:17:25,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-05-02 23:17:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-02 23:17:25,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:25,201 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:25,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:17:25,201 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash 25317135, now seen corresponding path program 73 times [2021-05-02 23:17:25,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:25,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831904272] [2021-05-02 23:17:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:25,212 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:25,212 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:27,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:27,463 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 23:17:27,463 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:27,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831904272] [2021-05-02 23:17:27,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831904272] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:27,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:27,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:17:27,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580946566] [2021-05-02 23:17:27,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:17:27,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:27,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:17:27,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:27,464 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:27,797 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-05-02 23:17:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:17:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2021-05-02 23:17:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:27,798 INFO L225 Difference]: With dead ends: 168 [2021-05-02 23:17:27,798 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 23:17:27,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2178.3ms TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 23:17:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-05-02 23:17:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-05-02 23:17:27,801 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-05-02 23:17:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:27,802 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-05-02 23:17:27,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-05-02 23:17:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 23:17:27,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:27,803 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:27,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:17:27,803 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2014208625, now seen corresponding path program 74 times [2021-05-02 23:17:27,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:27,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544331018] [2021-05-02 23:17:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:27,807 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:27,807 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:30,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:30,132 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 23:17:30,132 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:30,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544331018] [2021-05-02 23:17:30,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1544331018] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:30,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:30,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:17:30,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894926138] [2021-05-02 23:17:30,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:17:30,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:30,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:17:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:30,133 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:30,392 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-05-02 23:17:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:17:30,392 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2021-05-02 23:17:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:30,393 INFO L225 Difference]: With dead ends: 170 [2021-05-02 23:17:30,393 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 23:17:30,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2252.3ms TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 23:17:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-05-02 23:17:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-05-02 23:17:30,397 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-05-02 23:17:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:30,397 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-05-02 23:17:30,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-05-02 23:17:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 23:17:30,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:30,398 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:30,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:17:30,398 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:30,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2078483795, now seen corresponding path program 75 times [2021-05-02 23:17:30,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:30,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953966357] [2021-05-02 23:17:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:30,402 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:30,402 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,864 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 23:17:32,864 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:32,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953966357] [2021-05-02 23:17:32,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1953966357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:32,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:32,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:17:32,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084836492] [2021-05-02 23:17:32,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:17:32,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:32,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:17:32,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:32,866 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:33,084 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-05-02 23:17:33,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:17:33,084 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2021-05-02 23:17:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:33,085 INFO L225 Difference]: With dead ends: 172 [2021-05-02 23:17:33,085 INFO L226 Difference]: Without dead ends: 166 [2021-05-02 23:17:33,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2370.2ms TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-02 23:17:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-05-02 23:17:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-05-02 23:17:33,089 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-05-02 23:17:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:33,089 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-05-02 23:17:33,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-05-02 23:17:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 23:17:33,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:33,090 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:33,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:17:33,090 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:33,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:33,090 INFO L82 PathProgramCache]: Analyzing trace with hash -577587275, now seen corresponding path program 76 times [2021-05-02 23:17:33,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:33,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861269491] [2021-05-02 23:17:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:33,094 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:33,094 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,526 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 23:17:35,526 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:35,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861269491] [2021-05-02 23:17:35,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [861269491] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:35,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:35,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:17:35,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867341790] [2021-05-02 23:17:35,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:17:35,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:17:35,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:17:35,528 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:35,752 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-05-02 23:17:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:17:35,752 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2021-05-02 23:17:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:35,753 INFO L225 Difference]: With dead ends: 174 [2021-05-02 23:17:35,753 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 23:17:35,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2364.9ms TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:17:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 23:17:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-05-02 23:17:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-05-02 23:17:35,756 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-05-02 23:17:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:35,757 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-05-02 23:17:35,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-05-02 23:17:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 23:17:35,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:35,757 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:35,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:17:35,758 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:35,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1851311721, now seen corresponding path program 77 times [2021-05-02 23:17:35,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:35,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694603080] [2021-05-02 23:17:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:35,762 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:35,762 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:38,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:38,290 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 23:17:38,290 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:38,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694603080] [2021-05-02 23:17:38,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [694603080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:38,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:38,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:17:38,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130681810] [2021-05-02 23:17:38,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:17:38,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:38,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:17:38,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:17:38,291 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:38,510 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-05-02 23:17:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:17:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-05-02 23:17:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:38,511 INFO L225 Difference]: With dead ends: 176 [2021-05-02 23:17:38,511 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 23:17:38,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2448.6ms TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:17:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 23:17:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-05-02 23:17:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-05-02 23:17:38,518 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-05-02 23:17:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:38,518 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-05-02 23:17:38,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-05-02 23:17:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-02 23:17:38,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:38,519 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:38,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:17:38,519 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1834824967, now seen corresponding path program 78 times [2021-05-02 23:17:38,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:38,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261346810] [2021-05-02 23:17:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:38,524 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:38,524 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:41,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:41,118 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 23:17:41,118 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:41,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261346810] [2021-05-02 23:17:41,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261346810] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:41,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:41,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:17:41,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614129608] [2021-05-02 23:17:41,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:17:41,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:17:41,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:17:41,119 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:41,411 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-05-02 23:17:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:17:41,412 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2021-05-02 23:17:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:41,413 INFO L225 Difference]: With dead ends: 178 [2021-05-02 23:17:41,413 INFO L226 Difference]: Without dead ends: 172 [2021-05-02 23:17:41,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2506.3ms TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:17:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-02 23:17:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-05-02 23:17:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-05-02 23:17:41,416 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-05-02 23:17:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:41,417 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-05-02 23:17:41,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-05-02 23:17:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 23:17:41,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:41,417 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:41,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:17:41,418 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1124043739, now seen corresponding path program 79 times [2021-05-02 23:17:41,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:41,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751835857] [2021-05-02 23:17:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:41,421 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:41,422 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:44,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:44,203 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 23:17:44,203 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:44,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751835857] [2021-05-02 23:17:44,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1751835857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:44,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:44,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:17:44,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316558589] [2021-05-02 23:17:44,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:17:44,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:44,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:17:44,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:17:44,205 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:44,456 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-05-02 23:17:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:17:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-05-02 23:17:44,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:44,457 INFO L225 Difference]: With dead ends: 180 [2021-05-02 23:17:44,457 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 23:17:44,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2697.6ms TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:17:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 23:17:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-05-02 23:17:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-05-02 23:17:44,461 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-05-02 23:17:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:44,461 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-05-02 23:17:44,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-05-02 23:17:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 23:17:44,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:44,463 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:44,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:17:44,463 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:44,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:44,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1328520253, now seen corresponding path program 80 times [2021-05-02 23:17:44,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:44,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564086293] [2021-05-02 23:17:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:44,480 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:44,481 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:47,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:47,233 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 23:17:47,233 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:47,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564086293] [2021-05-02 23:17:47,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1564086293] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:47,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:47,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:17:47,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231569369] [2021-05-02 23:17:47,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:17:47,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:47,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:17:47,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:17:47,235 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:47,562 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-05-02 23:17:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:17:47,562 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2021-05-02 23:17:47,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:47,563 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:17:47,563 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 23:17:47,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2629.6ms TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:17:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 23:17:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-05-02 23:17:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-05-02 23:17:47,567 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-05-02 23:17:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:47,567 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-05-02 23:17:47,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-05-02 23:17:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-02 23:17:47,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:47,568 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:47,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:17:47,568 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:47,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:47,568 INFO L82 PathProgramCache]: Analyzing trace with hash 261954591, now seen corresponding path program 81 times [2021-05-02 23:17:47,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:47,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259254932] [2021-05-02 23:17:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:47,572 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:47,573 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,357 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 23:17:50,357 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:50,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259254932] [2021-05-02 23:17:50,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259254932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:50,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:50,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:17:50,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078640256] [2021-05-02 23:17:50,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:17:50,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:17:50,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:17:50,358 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:50,750 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-05-02 23:17:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:17:50,751 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2021-05-02 23:17:50,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:50,752 INFO L225 Difference]: With dead ends: 184 [2021-05-02 23:17:50,752 INFO L226 Difference]: Without dead ends: 178 [2021-05-02 23:17:50,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2703.3ms TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:17:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-02 23:17:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-05-02 23:17:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2021-05-02 23:17:50,755 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2021-05-02 23:17:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:50,756 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2021-05-02 23:17:50,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2021-05-02 23:17:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-02 23:17:50,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:50,757 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:50,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:17:50,757 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:50,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1789537153, now seen corresponding path program 82 times [2021-05-02 23:17:50,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:50,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880609715] [2021-05-02 23:17:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:50,761 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:50,762 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:53,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:53,589 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 23:17:53,589 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:53,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880609715] [2021-05-02 23:17:53,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880609715] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:53,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:53,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:17:53,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959230020] [2021-05-02 23:17:53,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:17:53,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:53,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:17:53,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:17:53,590 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:53,826 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-05-02 23:17:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:17:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2021-05-02 23:17:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:53,827 INFO L225 Difference]: With dead ends: 186 [2021-05-02 23:17:53,827 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 23:17:53,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2755.2ms TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:17:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 23:17:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-05-02 23:17:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-05-02 23:17:53,830 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2021-05-02 23:17:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:53,830 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-05-02 23:17:53,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-05-02 23:17:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 23:17:53,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:53,831 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:53,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:17:53,831 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:53,831 INFO L82 PathProgramCache]: Analyzing trace with hash 917564003, now seen corresponding path program 83 times [2021-05-02 23:17:53,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:53,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497508673] [2021-05-02 23:17:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:53,835 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:53,836 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:56,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:56,780 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 23:17:56,780 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:56,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497508673] [2021-05-02 23:17:56,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1497508673] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:56,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:56,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:17:56,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266339859] [2021-05-02 23:17:56,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:17:56,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:56,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:17:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:17:56,782 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:57,115 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-05-02 23:17:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:17:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2021-05-02 23:17:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:57,116 INFO L225 Difference]: With dead ends: 188 [2021-05-02 23:17:57,116 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 23:17:57,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2855.9ms TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:17:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 23:17:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-05-02 23:17:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0056818181818181) internal successors, (177), 176 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2021-05-02 23:17:57,120 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2021-05-02 23:17:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:57,120 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2021-05-02 23:17:57,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2021-05-02 23:17:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 23:17:57,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:57,121 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:57,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:17:57,121 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash 469989573, now seen corresponding path program 84 times [2021-05-02 23:17:57,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:57,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580913023] [2021-05-02 23:17:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:57,126 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:57,126 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:00,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:00,109 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 23:18:00,110 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:00,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580913023] [2021-05-02 23:18:00,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1580913023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:00,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:00,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:18:00,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860763162] [2021-05-02 23:18:00,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:18:00,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:18:00,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:00,111 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:00,527 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-05-02 23:18:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:18:00,527 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2021-05-02 23:18:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:00,528 INFO L225 Difference]: With dead ends: 190 [2021-05-02 23:18:00,528 INFO L226 Difference]: Without dead ends: 184 [2021-05-02 23:18:00,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2899.2ms TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-02 23:18:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-05-02 23:18:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0056179775280898) internal successors, (179), 178 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2021-05-02 23:18:00,532 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2021-05-02 23:18:00,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:00,532 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2021-05-02 23:18:00,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2021-05-02 23:18:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-02 23:18:00,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:00,534 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:00,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:18:00,534 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:00,534 INFO L82 PathProgramCache]: Analyzing trace with hash -152308057, now seen corresponding path program 85 times [2021-05-02 23:18:00,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:00,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428818521] [2021-05-02 23:18:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:00,543 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:00,544 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:03,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:03,601 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 23:18:03,601 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:03,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428818521] [2021-05-02 23:18:03,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [428818521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:03,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:03,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:18:03,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589157147] [2021-05-02 23:18:03,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:18:03,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:03,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:18:03,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:03,603 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:04,059 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-05-02 23:18:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:18:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2021-05-02 23:18:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:04,061 INFO L225 Difference]: With dead ends: 192 [2021-05-02 23:18:04,061 INFO L226 Difference]: Without dead ends: 186 [2021-05-02 23:18:04,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2974.2ms TimeCoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-02 23:18:04,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-05-02 23:18:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-05-02 23:18:04,065 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2021-05-02 23:18:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:04,065 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-05-02 23:18:04,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-05-02 23:18:04,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-05-02 23:18:04,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:04,066 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:04,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:18:04,066 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:04,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1179876343, now seen corresponding path program 86 times [2021-05-02 23:18:04,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:04,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296424096] [2021-05-02 23:18:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:04,072 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:04,072 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:07,250 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 23:18:07,251 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296424096] [2021-05-02 23:18:07,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296424096] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:07,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:07,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:18:07,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273172928] [2021-05-02 23:18:07,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:18:07,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:07,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:18:07,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:07,252 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:07,513 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-05-02 23:18:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:18:07,514 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2021-05-02 23:18:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:07,514 INFO L225 Difference]: With dead ends: 194 [2021-05-02 23:18:07,514 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 23:18:07,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3087.0ms TimeCoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 23:18:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-05-02 23:18:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0054945054945055) internal successors, (183), 182 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-05-02 23:18:07,518 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2021-05-02 23:18:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:07,518 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-05-02 23:18:07,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-05-02 23:18:07,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 23:18:07,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:07,519 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:07,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:18:07,520 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:07,520 INFO L82 PathProgramCache]: Analyzing trace with hash -830521109, now seen corresponding path program 87 times [2021-05-02 23:18:07,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:07,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212497511] [2021-05-02 23:18:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:07,524 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:07,524 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:10,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:10,801 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 23:18:10,802 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:10,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212497511] [2021-05-02 23:18:10,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [212497511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:10,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:10,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:18:10,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291529806] [2021-05-02 23:18:10,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:18:10,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:18:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:10,803 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:11,249 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2021-05-02 23:18:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:18:11,250 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2021-05-02 23:18:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:11,251 INFO L225 Difference]: With dead ends: 196 [2021-05-02 23:18:11,251 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 23:18:11,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3189.6ms TimeCoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 23:18:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-05-02 23:18:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0054347826086956) internal successors, (185), 184 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2021-05-02 23:18:11,255 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2021-05-02 23:18:11,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:11,255 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2021-05-02 23:18:11,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2021-05-02 23:18:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-02 23:18:11,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:11,256 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:11,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:18:11,256 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash -107590323, now seen corresponding path program 88 times [2021-05-02 23:18:11,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:11,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494887025] [2021-05-02 23:18:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:11,261 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:11,261 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:14,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:14,538 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 23:18:14,538 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494887025] [2021-05-02 23:18:14,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494887025] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:14,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:14,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:18:14,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327702127] [2021-05-02 23:18:14,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:18:14,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:14,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:18:14,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:14,540 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:14,941 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-05-02 23:18:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:18:14,941 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2021-05-02 23:18:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:14,942 INFO L225 Difference]: With dead ends: 198 [2021-05-02 23:18:14,942 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 23:18:14,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3189.0ms TimeCoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 23:18:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-05-02 23:18:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0053763440860215) internal successors, (187), 186 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2021-05-02 23:18:14,946 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2021-05-02 23:18:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:14,947 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2021-05-02 23:18:14,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2021-05-02 23:18:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-02 23:18:14,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:14,948 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:14,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:18:14,948 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:14,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1155806929, now seen corresponding path program 89 times [2021-05-02 23:18:14,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:14,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981027940] [2021-05-02 23:18:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:14,959 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:14,960 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:18,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:18,352 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 23:18:18,352 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:18,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981027940] [2021-05-02 23:18:18,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [981027940] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:18,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:18,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:18:18,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832053241] [2021-05-02 23:18:18,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:18:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:18,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:18:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:18,353 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:18,673 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2021-05-02 23:18:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:18:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2021-05-02 23:18:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:18,675 INFO L225 Difference]: With dead ends: 200 [2021-05-02 23:18:18,675 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 23:18:18,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3289.0ms TimeCoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 23:18:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-05-02 23:18:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2021-05-02 23:18:18,678 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2021-05-02 23:18:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:18,678 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2021-05-02 23:18:18,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2021-05-02 23:18:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-05-02 23:18:18,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:18,679 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:18,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:18:18,680 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash 825349265, now seen corresponding path program 90 times [2021-05-02 23:18:18,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:18,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635874816] [2021-05-02 23:18:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:18,684 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:18,684 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:22,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:22,145 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 23:18:22,145 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:22,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635874816] [2021-05-02 23:18:22,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635874816] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:22,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:22,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:18:22,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014225687] [2021-05-02 23:18:22,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:18:22,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:22,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:18:22,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:22,146 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:22,450 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2021-05-02 23:18:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:18:22,450 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2021-05-02 23:18:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:22,451 INFO L225 Difference]: With dead ends: 202 [2021-05-02 23:18:22,451 INFO L226 Difference]: Without dead ends: 196 [2021-05-02 23:18:22,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3355.3ms TimeCoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-02 23:18:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-05-02 23:18:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-05-02 23:18:22,455 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2021-05-02 23:18:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:22,455 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-05-02 23:18:22,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:22,456 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-05-02 23:18:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 23:18:22,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:22,456 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:22,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:18:22,457 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:22,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2045939571, now seen corresponding path program 91 times [2021-05-02 23:18:22,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:22,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812465084] [2021-05-02 23:18:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:22,461 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:22,461 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:25,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:25,979 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 23:18:25,979 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:25,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812465084] [2021-05-02 23:18:25,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812465084] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:25,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:25,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:18:25,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119321046] [2021-05-02 23:18:25,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:18:25,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:25,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:18:25,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:18:25,981 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:26,272 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2021-05-02 23:18:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:18:26,273 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2021-05-02 23:18:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:26,274 INFO L225 Difference]: With dead ends: 204 [2021-05-02 23:18:26,274 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 23:18:26,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3429.7ms TimeCoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:18:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 23:18:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-05-02 23:18:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2021-05-02 23:18:26,277 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2021-05-02 23:18:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:26,278 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2021-05-02 23:18:26,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2021-05-02 23:18:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-02 23:18:26,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:26,279 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:26,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:18:26,279 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:26,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1787815467, now seen corresponding path program 92 times [2021-05-02 23:18:26,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:26,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185764691] [2021-05-02 23:18:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:26,287 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:26,288 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:29,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:29,949 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 23:18:29,949 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:29,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185764691] [2021-05-02 23:18:29,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [185764691] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:29,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:29,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:18:29,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375554794] [2021-05-02 23:18:29,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:18:29,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:29,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:18:29,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:18:29,951 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:30,253 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2021-05-02 23:18:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:18:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2021-05-02 23:18:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:30,254 INFO L225 Difference]: With dead ends: 206 [2021-05-02 23:18:30,254 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 23:18:30,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3549.2ms TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:18:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 23:18:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-05-02 23:18:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2021-05-02 23:18:30,257 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2021-05-02 23:18:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:30,257 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2021-05-02 23:18:30,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2021-05-02 23:18:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-02 23:18:30,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:30,259 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:30,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:18:30,259 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash -944467017, now seen corresponding path program 93 times [2021-05-02 23:18:30,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:30,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157914870] [2021-05-02 23:18:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:30,271 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:30,272 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:33,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:33,951 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 23:18:33,951 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:33,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157914870] [2021-05-02 23:18:33,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157914870] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:33,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:33,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:18:33,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897343211] [2021-05-02 23:18:33,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:18:33,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:18:33,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:18:33,952 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:34,290 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2021-05-02 23:18:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:18:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2021-05-02 23:18:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:34,292 INFO L225 Difference]: With dead ends: 208 [2021-05-02 23:18:34,292 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 23:18:34,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3585.8ms TimeCoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:18:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 23:18:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-05-02 23:18:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2021-05-02 23:18:34,295 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2021-05-02 23:18:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:34,295 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2021-05-02 23:18:34,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2021-05-02 23:18:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-02 23:18:34,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:34,296 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:34,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:18:34,297 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:34,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2059541785, now seen corresponding path program 94 times [2021-05-02 23:18:34,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:34,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597221401] [2021-05-02 23:18:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:34,306 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:34,307 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:38,101 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 23:18:38,101 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:38,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597221401] [2021-05-02 23:18:38,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1597221401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:38,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:38,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:18:38,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820544430] [2021-05-02 23:18:38,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:18:38,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:18:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:18:38,103 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:38,538 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2021-05-02 23:18:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:18:38,538 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2021-05-02 23:18:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:38,539 INFO L225 Difference]: With dead ends: 210 [2021-05-02 23:18:38,539 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 23:18:38,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3705.6ms TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:18:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 23:18:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-05-02 23:18:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.005050505050505) internal successors, (199), 198 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2021-05-02 23:18:38,543 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2021-05-02 23:18:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:38,543 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2021-05-02 23:18:38,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2021-05-02 23:18:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 23:18:38,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:38,544 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:38,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:18:38,544 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:38,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1600989701, now seen corresponding path program 95 times [2021-05-02 23:18:38,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:38,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557877935] [2021-05-02 23:18:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:38,547 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:38,548 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:42,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:42,395 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 23:18:42,395 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:42,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557877935] [2021-05-02 23:18:42,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557877935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:42,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:42,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:18:42,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230817737] [2021-05-02 23:18:42,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:18:42,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:42,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:18:42,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:18:42,396 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:42,914 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2021-05-02 23:18:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 23:18:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2021-05-02 23:18:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:42,915 INFO L225 Difference]: With dead ends: 212 [2021-05-02 23:18:42,915 INFO L226 Difference]: Without dead ends: 206 [2021-05-02 23:18:42,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3759.6ms TimeCoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:18:42,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-02 23:18:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-05-02 23:18:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.005) internal successors, (201), 200 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2021-05-02 23:18:42,919 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2021-05-02 23:18:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:42,920 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2021-05-02 23:18:42,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2021-05-02 23:18:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 23:18:42,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:42,921 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:42,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:18:42,921 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1793532323, now seen corresponding path program 96 times [2021-05-02 23:18:42,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:42,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061527511] [2021-05-02 23:18:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:42,925 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:42,926 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:46,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:46,877 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 23:18:46,877 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:46,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061527511] [2021-05-02 23:18:46,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061527511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:46,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:46,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:18:46,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031851393] [2021-05-02 23:18:46,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:18:46,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:46,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:18:46,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:18:46,878 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:47,356 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2021-05-02 23:18:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 23:18:47,357 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2021-05-02 23:18:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:47,358 INFO L225 Difference]: With dead ends: 214 [2021-05-02 23:18:47,358 INFO L226 Difference]: Without dead ends: 208 [2021-05-02 23:18:47,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3854.9ms TimeCoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:18:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-02 23:18:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-05-02 23:18:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.004950495049505) internal successors, (203), 202 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2021-05-02 23:18:47,362 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2021-05-02 23:18:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:47,362 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2021-05-02 23:18:47,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2021-05-02 23:18:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-02 23:18:47,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:47,363 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:47,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:18:47,363 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2143398337, now seen corresponding path program 97 times [2021-05-02 23:18:47,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:47,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417017666] [2021-05-02 23:18:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:47,367 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:47,367 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:51,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:51,436 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:51,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417017666] [2021-05-02 23:18:51,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [417017666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:51,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:51,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-02 23:18:51,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542574943] [2021-05-02 23:18:51,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 23:18:51,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 23:18:51,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:18:51,438 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:51,867 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2021-05-02 23:18:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 23:18:51,868 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2021-05-02 23:18:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:51,869 INFO L225 Difference]: With dead ends: 216 [2021-05-02 23:18:51,869 INFO L226 Difference]: Without dead ends: 210 [2021-05-02 23:18:51,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3970.5ms TimeCoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:18:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-02 23:18:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-05-02 23:18:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0049019607843137) internal successors, (205), 204 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2021-05-02 23:18:51,872 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2021-05-02 23:18:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:51,872 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2021-05-02 23:18:51,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2021-05-02 23:18:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-02 23:18:51,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:51,873 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:51,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:18:51,873 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:51,873 INFO L82 PathProgramCache]: Analyzing trace with hash 937778593, now seen corresponding path program 98 times [2021-05-02 23:18:51,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:51,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114838216] [2021-05-02 23:18:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:51,882 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:51,882 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:56,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:56,031 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 23:18:56,032 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:56,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114838216] [2021-05-02 23:18:56,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [114838216] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:56,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:56,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-02 23:18:56,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281280144] [2021-05-02 23:18:56,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 23:18:56,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:56,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 23:18:56,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:18:56,033 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:56,376 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2021-05-02 23:18:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 23:18:56,376 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2021-05-02 23:18:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:56,377 INFO L225 Difference]: With dead ends: 218 [2021-05-02 23:18:56,377 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 23:18:56,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 4049.7ms TimeCoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:18:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 23:18:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-05-02 23:18:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2021-05-02 23:18:56,382 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2021-05-02 23:18:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:56,382 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2021-05-02 23:18:56,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2021-05-02 23:18:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 23:18:56,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:56,383 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:56,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:18:56,383 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:56,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1578625917, now seen corresponding path program 99 times [2021-05-02 23:18:56,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:56,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502501955] [2021-05-02 23:18:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:56,388 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:56,388 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:00,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:00,639 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 23:19:00,639 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:00,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502501955] [2021-05-02 23:19:00,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502501955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:00,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:00,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-02 23:19:00,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862350943] [2021-05-02 23:19:00,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 23:19:00,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:00,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 23:19:00,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:00,641 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:01,153 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2021-05-02 23:19:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 23:19:01,154 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2021-05-02 23:19:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:01,154 INFO L225 Difference]: With dead ends: 220 [2021-05-02 23:19:01,155 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 23:19:01,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4159.0ms TimeCoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 23:19:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-05-02 23:19:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2021-05-02 23:19:01,158 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2021-05-02 23:19:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:01,158 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2021-05-02 23:19:01,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2021-05-02 23:19:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-02 23:19:01,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:01,159 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:01,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:19:01,160 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1776772379, now seen corresponding path program 100 times [2021-05-02 23:19:01,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:01,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645854952] [2021-05-02 23:19:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:01,166 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:01,166 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:05,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:05,599 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 23:19:05,599 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:05,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645854952] [2021-05-02 23:19:05,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1645854952] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:05,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:05,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-02 23:19:05,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086172363] [2021-05-02 23:19:05,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 23:19:05,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:05,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 23:19:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:05,602 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:06,138 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2021-05-02 23:19:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 23:19:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2021-05-02 23:19:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:06,140 INFO L225 Difference]: With dead ends: 222 [2021-05-02 23:19:06,140 INFO L226 Difference]: Without dead ends: 216 [2021-05-02 23:19:06,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4338.0ms TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-02 23:19:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-05-02 23:19:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2021-05-02 23:19:06,144 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2021-05-02 23:19:06,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:06,144 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2021-05-02 23:19:06,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,145 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2021-05-02 23:19:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-05-02 23:19:06,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:06,145 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:06,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-02 23:19:06,146 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1078005959, now seen corresponding path program 101 times [2021-05-02 23:19:06,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:06,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205914840] [2021-05-02 23:19:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:06,152 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:06,153 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:10,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:10,666 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 23:19:10,667 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:10,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205914840] [2021-05-02 23:19:10,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [205914840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:10,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:10,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-02 23:19:10,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348191398] [2021-05-02 23:19:10,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 23:19:10,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:10,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 23:19:10,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:19:10,668 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:11,273 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2021-05-02 23:19:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 23:19:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2021-05-02 23:19:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:11,274 INFO L225 Difference]: With dead ends: 224 [2021-05-02 23:19:11,274 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 23:19:11,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4409.7ms TimeCoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:19:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 23:19:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-02 23:19:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0047169811320755) internal successors, (213), 212 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2021-05-02 23:19:11,277 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2021-05-02 23:19:11,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:11,278 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2021-05-02 23:19:11,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2021-05-02 23:19:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-05-02 23:19:11,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:11,279 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:11,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:19:11,279 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:11,279 INFO L82 PathProgramCache]: Analyzing trace with hash 35886633, now seen corresponding path program 102 times [2021-05-02 23:19:11,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:11,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124770560] [2021-05-02 23:19:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:11,285 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:11,285 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:15,902 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 23:19:15,902 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:15,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124770560] [2021-05-02 23:19:15,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1124770560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:15,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:15,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-02 23:19:15,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350271136] [2021-05-02 23:19:15,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 23:19:15,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:15,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 23:19:15,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:19:15,904 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:16,387 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2021-05-02 23:19:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 23:19:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2021-05-02 23:19:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:16,389 INFO L225 Difference]: With dead ends: 226 [2021-05-02 23:19:16,389 INFO L226 Difference]: Without dead ends: 220 [2021-05-02 23:19:16,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4513.3ms TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:19:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-02 23:19:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-05-02 23:19:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0046728971962617) internal successors, (215), 214 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2021-05-02 23:19:16,398 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2021-05-02 23:19:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:16,398 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2021-05-02 23:19:16,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2021-05-02 23:19:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-02 23:19:16,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:16,399 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:16,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:19:16,399 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:16,400 INFO L82 PathProgramCache]: Analyzing trace with hash -713405685, now seen corresponding path program 103 times [2021-05-02 23:19:16,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:16,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839109404] [2021-05-02 23:19:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:16,403 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:16,404 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:21,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:21,091 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 23:19:21,091 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:21,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839109404] [2021-05-02 23:19:21,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839109404] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:21,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:21,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-02 23:19:21,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259377950] [2021-05-02 23:19:21,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-02 23:19:21,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-02 23:19:21,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:19:21,093 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:21,483 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2021-05-02 23:19:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-02 23:19:21,484 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2021-05-02 23:19:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:21,484 INFO L225 Difference]: With dead ends: 228 [2021-05-02 23:19:21,484 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 23:19:21,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4586.3ms TimeCoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:19:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 23:19:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-05-02 23:19:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0046296296296295) internal successors, (217), 216 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2021-05-02 23:19:21,489 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2021-05-02 23:19:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:21,489 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2021-05-02 23:19:21,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2021-05-02 23:19:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 23:19:21,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:21,490 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:21,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-02 23:19:21,490 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:21,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:21,490 INFO L82 PathProgramCache]: Analyzing trace with hash 771182445, now seen corresponding path program 104 times [2021-05-02 23:19:21,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:21,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875364332] [2021-05-02 23:19:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:21,498 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:21,499 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:26,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:26,330 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 23:19:26,330 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:26,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875364332] [2021-05-02 23:19:26,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [875364332] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:26,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:26,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-02 23:19:26,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441961613] [2021-05-02 23:19:26,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 23:19:26,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:26,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 23:19:26,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:19:26,332 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:26,709 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2021-05-02 23:19:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 23:19:26,710 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2021-05-02 23:19:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:26,710 INFO L225 Difference]: With dead ends: 230 [2021-05-02 23:19:26,711 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 23:19:26,711 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4721.5ms TimeCoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:19:26,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 23:19:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-05-02 23:19:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0045871559633028) internal successors, (219), 218 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2021-05-02 23:19:26,715 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2021-05-02 23:19:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:26,715 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2021-05-02 23:19:26,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2021-05-02 23:19:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-05-02 23:19:26,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:26,716 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:26,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:19:26,716 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:26,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1531233103, now seen corresponding path program 105 times [2021-05-02 23:19:26,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:26,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671969653] [2021-05-02 23:19:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:26,721 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:26,722 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:31,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:31,657 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 23:19:31,658 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:31,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671969653] [2021-05-02 23:19:31,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671969653] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:31,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:31,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-02 23:19:31,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967326266] [2021-05-02 23:19:31,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-02 23:19:31,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:31,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-02 23:19:31,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:19:31,660 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:32,054 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2021-05-02 23:19:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-02 23:19:32,055 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2021-05-02 23:19:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:32,056 INFO L225 Difference]: With dead ends: 232 [2021-05-02 23:19:32,056 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 23:19:32,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4827.4ms TimeCoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:19:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 23:19:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-05-02 23:19:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0045454545454546) internal successors, (221), 220 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2021-05-02 23:19:32,060 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2021-05-02 23:19:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:32,060 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2021-05-02 23:19:32,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,060 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2021-05-02 23:19:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-05-02 23:19:32,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:32,061 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:32,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:19:32,061 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:32,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1795475121, now seen corresponding path program 106 times [2021-05-02 23:19:32,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:32,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136939087] [2021-05-02 23:19:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:32,065 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:32,066 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:37,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:37,186 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 23:19:37,186 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:37,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136939087] [2021-05-02 23:19:37,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [136939087] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:37,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:37,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-02 23:19:37,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322276925] [2021-05-02 23:19:37,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 23:19:37,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 23:19:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:19:37,188 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:37,610 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2021-05-02 23:19:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 23:19:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2021-05-02 23:19:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:37,611 INFO L225 Difference]: With dead ends: 234 [2021-05-02 23:19:37,612 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 23:19:37,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 5001.9ms TimeCoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:19:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 23:19:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-02 23:19:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0045045045045045) internal successors, (223), 222 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2021-05-02 23:19:37,615 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2021-05-02 23:19:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:37,615 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2021-05-02 23:19:37,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2021-05-02 23:19:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-02 23:19:37,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:37,616 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:37,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:19:37,616 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:37,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1965983341, now seen corresponding path program 107 times [2021-05-02 23:19:37,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:37,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921604698] [2021-05-02 23:19:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:37,620 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:37,621 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:42,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:42,833 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 23:19:42,833 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:42,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921604698] [2021-05-02 23:19:42,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [921604698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:42,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:42,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-02 23:19:42,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3468921] [2021-05-02 23:19:42,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 23:19:42,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:42,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 23:19:42,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:19:42,835 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:43,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:43,248 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2021-05-02 23:19:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 23:19:43,248 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2021-05-02 23:19:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:43,249 INFO L225 Difference]: With dead ends: 236 [2021-05-02 23:19:43,249 INFO L226 Difference]: Without dead ends: 230 [2021-05-02 23:19:43,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5097.1ms TimeCoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:19:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-02 23:19:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-05-02 23:19:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0044642857142858) internal successors, (225), 224 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2021-05-02 23:19:43,252 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2021-05-02 23:19:43,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:43,253 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2021-05-02 23:19:43,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2021-05-02 23:19:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-02 23:19:43,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:43,254 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:43,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:19:43,254 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash -365102091, now seen corresponding path program 108 times [2021-05-02 23:19:43,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:43,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138648337] [2021-05-02 23:19:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:43,263 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:43,264 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,707 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 23:19:48,707 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:48,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138648337] [2021-05-02 23:19:48,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [138648337] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:48,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:48,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-02 23:19:48,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863658776] [2021-05-02 23:19:48,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 23:19:48,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:48,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 23:19:48,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:19:48,709 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:49,192 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2021-05-02 23:19:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 23:19:49,193 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 228 [2021-05-02 23:19:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:49,194 INFO L225 Difference]: With dead ends: 238 [2021-05-02 23:19:49,194 INFO L226 Difference]: Without dead ends: 232 [2021-05-02 23:19:49,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5328.0ms TimeCoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:19:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-02 23:19:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-05-02 23:19:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0044247787610618) internal successors, (227), 226 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2021-05-02 23:19:49,197 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2021-05-02 23:19:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:49,197 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2021-05-02 23:19:49,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2021-05-02 23:19:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-02 23:19:49,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:49,198 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:49,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:19:49,198 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:49,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:49,198 INFO L82 PathProgramCache]: Analyzing trace with hash 483487191, now seen corresponding path program 109 times [2021-05-02 23:19:49,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:49,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983689874] [2021-05-02 23:19:49,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:49,204 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:49,204 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:55,011 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 23:19:55,011 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:55,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983689874] [2021-05-02 23:19:55,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983689874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:55,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:55,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-02 23:19:55,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112113638] [2021-05-02 23:19:55,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-02 23:19:55,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:55,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-02 23:19:55,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:19:55,013 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:55,702 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2021-05-02 23:19:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-02 23:19:55,703 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2021-05-02 23:19:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:55,703 INFO L225 Difference]: With dead ends: 240 [2021-05-02 23:19:55,704 INFO L226 Difference]: Without dead ends: 234 [2021-05-02 23:19:55,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 5672.4ms TimeCoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:19:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-02 23:19:55,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-05-02 23:19:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0043859649122806) internal successors, (229), 228 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2021-05-02 23:19:55,708 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2021-05-02 23:19:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:55,708 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2021-05-02 23:19:55,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2021-05-02 23:19:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-05-02 23:19:55,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:55,709 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:55,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-02 23:19:55,709 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash -65999047, now seen corresponding path program 110 times [2021-05-02 23:19:55,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:55,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470775162] [2021-05-02 23:19:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:55,714 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:55,715 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:01,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:01,512 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 23:20:01,512 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:01,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470775162] [2021-05-02 23:20:01,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470775162] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:01,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:01,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-02 23:20:01,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513113305] [2021-05-02 23:20:01,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 23:20:01,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 23:20:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:20:01,514 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:02,337 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2021-05-02 23:20:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 23:20:02,338 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2021-05-02 23:20:02,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:02,338 INFO L225 Difference]: With dead ends: 242 [2021-05-02 23:20:02,338 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 23:20:02,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 5670.9ms TimeCoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:20:02,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 23:20:02,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 23:20:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0043478260869565) internal successors, (231), 230 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2021-05-02 23:20:02,347 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2021-05-02 23:20:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:02,347 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2021-05-02 23:20:02,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2021-05-02 23:20:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-02 23:20:02,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:02,348 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:02,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:20:02,349 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash 158703643, now seen corresponding path program 111 times [2021-05-02 23:20:02,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:02,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516935530] [2021-05-02 23:20:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:02,362 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:02,363 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:08,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:08,505 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 23:20:08,505 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:08,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516935530] [2021-05-02 23:20:08,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [516935530] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:08,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:08,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-02 23:20:08,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572961082] [2021-05-02 23:20:08,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-02 23:20:08,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:08,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-02 23:20:08,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:20:08,507 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:09,221 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2021-05-02 23:20:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-02 23:20:09,222 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2021-05-02 23:20:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:09,223 INFO L225 Difference]: With dead ends: 244 [2021-05-02 23:20:09,223 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 23:20:09,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 6011.6ms TimeCoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:20:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 23:20:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-05-02 23:20:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0043103448275863) internal successors, (233), 232 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2021-05-02 23:20:09,227 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2021-05-02 23:20:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:09,227 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2021-05-02 23:20:09,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2021-05-02 23:20:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-02 23:20:09,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:09,228 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:09,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:20:09,228 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1349623933, now seen corresponding path program 112 times [2021-05-02 23:20:09,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:09,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284202415] [2021-05-02 23:20:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:09,241 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:09,242 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:15,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:15,541 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 23:20:15,541 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:15,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284202415] [2021-05-02 23:20:15,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [284202415] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:15,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:15,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-02 23:20:15,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050739502] [2021-05-02 23:20:15,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 23:20:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 23:20:15,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:20:15,543 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:16,289 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2021-05-02 23:20:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 23:20:16,290 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2021-05-02 23:20:16,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:16,291 INFO L225 Difference]: With dead ends: 246 [2021-05-02 23:20:16,291 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 23:20:16,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 6164.0ms TimeCoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:20:16,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 23:20:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-05-02 23:20:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0042735042735043) internal successors, (235), 234 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-05-02 23:20:16,294 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2021-05-02 23:20:16,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:16,295 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-05-02 23:20:16,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-05-02 23:20:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-02 23:20:16,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:16,296 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:16,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-02 23:20:16,296 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:16,296 INFO L82 PathProgramCache]: Analyzing trace with hash -932245409, now seen corresponding path program 113 times [2021-05-02 23:20:16,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:16,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003561287] [2021-05-02 23:20:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:16,299 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:16,300 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:23,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:23,043 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 23:20:23,043 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:23,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003561287] [2021-05-02 23:20:23,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2003561287] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:23,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:23,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-02 23:20:23,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709955023] [2021-05-02 23:20:23,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-02 23:20:23,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:23,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-02 23:20:23,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:20:23,045 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:23,469 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2021-05-02 23:20:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-02 23:20:23,470 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2021-05-02 23:20:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:23,470 INFO L225 Difference]: With dead ends: 248 [2021-05-02 23:20:23,470 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 23:20:23,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 6617.8ms TimeCoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:20:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 23:20:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2021-05-02 23:20:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0042372881355932) internal successors, (237), 236 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2021-05-02 23:20:23,474 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2021-05-02 23:20:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:23,474 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2021-05-02 23:20:23,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2021-05-02 23:20:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-02 23:20:23,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:23,475 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:23,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-02 23:20:23,475 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:23,476 INFO L82 PathProgramCache]: Analyzing trace with hash 919605185, now seen corresponding path program 114 times [2021-05-02 23:20:23,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:23,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284191141] [2021-05-02 23:20:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:23,480 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:23,481 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:30,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:30,285 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 23:20:30,285 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284191141] [2021-05-02 23:20:30,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [284191141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:30,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:30,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-02 23:20:30,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329030036] [2021-05-02 23:20:30,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 23:20:30,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:30,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 23:20:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:20:30,287 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:30,956 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2021-05-02 23:20:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 23:20:30,957 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2021-05-02 23:20:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:30,957 INFO L225 Difference]: With dead ends: 250 [2021-05-02 23:20:30,957 INFO L226 Difference]: Without dead ends: 244 [2021-05-02 23:20:30,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 6678.5ms TimeCoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:20:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-02 23:20:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-05-02 23:20:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.004201680672269) internal successors, (239), 238 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2021-05-02 23:20:30,961 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2021-05-02 23:20:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:30,961 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2021-05-02 23:20:30,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2021-05-02 23:20:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 23:20:30,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:30,962 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:30,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-02 23:20:30,962 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1863401821, now seen corresponding path program 115 times [2021-05-02 23:20:30,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:30,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991031171] [2021-05-02 23:20:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:30,969 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:30,970 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:38,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:38,135 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 23:20:38,135 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:38,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991031171] [2021-05-02 23:20:38,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991031171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:38,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:38,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-02 23:20:38,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823159755] [2021-05-02 23:20:38,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-02 23:20:38,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-02 23:20:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:20:38,138 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:38,790 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2021-05-02 23:20:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-02 23:20:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2021-05-02 23:20:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:38,792 INFO L225 Difference]: With dead ends: 252 [2021-05-02 23:20:38,792 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 23:20:38,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 7034.9ms TimeCoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:20:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 23:20:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-05-02 23:20:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2021-05-02 23:20:38,796 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2021-05-02 23:20:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:38,796 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2021-05-02 23:20:38,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2021-05-02 23:20:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-02 23:20:38,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:38,797 INFO L523 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:38,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-02 23:20:38,797 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash -568509179, now seen corresponding path program 116 times [2021-05-02 23:20:38,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:38,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267389685] [2021-05-02 23:20:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:38,801 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:38,802 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:46,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:46,364 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 23:20:46,364 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:46,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267389685] [2021-05-02 23:20:46,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1267389685] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:46,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:46,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-02 23:20:46,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907365332] [2021-05-02 23:20:46,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 23:20:46,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:46,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 23:20:46,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:20:46,367 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:46,834 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2021-05-02 23:20:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 23:20:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2021-05-02 23:20:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:46,835 INFO L225 Difference]: With dead ends: 254 [2021-05-02 23:20:46,835 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 23:20:46,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 7401.9ms TimeCoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:20:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 23:20:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-05-02 23:20:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0041322314049588) internal successors, (243), 242 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2021-05-02 23:20:46,839 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2021-05-02 23:20:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:46,839 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2021-05-02 23:20:46,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2021-05-02 23:20:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-02 23:20:46,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:46,840 INFO L523 BasicCegarLoop]: trace histogram [117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:46,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-02 23:20:46,840 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1717196057, now seen corresponding path program 117 times [2021-05-02 23:20:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:46,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469098070] [2021-05-02 23:20:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:46,851 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:46,851 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:54,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:54,517 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469098070] [2021-05-02 23:20:54,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1469098070] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:54,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:54,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2021-05-02 23:20:54,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464166443] [2021-05-02 23:20:54,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-02 23:20:54,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:54,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-02 23:20:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:20:54,519 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:55,369 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2021-05-02 23:20:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 23:20:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2021-05-02 23:20:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:55,371 INFO L225 Difference]: With dead ends: 256 [2021-05-02 23:20:55,371 INFO L226 Difference]: Without dead ends: 250 [2021-05-02 23:20:55,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 7518.7ms TimeCoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:20:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-02 23:20:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-05-02 23:20:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0040983606557377) internal successors, (245), 244 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2021-05-02 23:20:55,375 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2021-05-02 23:20:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:55,375 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2021-05-02 23:20:55,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2021-05-02 23:20:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-02 23:20:55,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:55,376 INFO L523 BasicCegarLoop]: trace histogram [118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:55,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-02 23:20:55,376 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1798690743, now seen corresponding path program 118 times [2021-05-02 23:20:55,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:55,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910531666] [2021-05-02 23:20:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:55,381 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:55,381 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:03,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:03,477 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 23:21:03,477 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:03,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910531666] [2021-05-02 23:21:03,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910531666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:03,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:03,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2021-05-02 23:21:03,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973287686] [2021-05-02 23:21:03,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 23:21:03,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:03,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 23:21:03,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:21:03,480 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:04,396 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2021-05-02 23:21:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 23:21:04,397 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2021-05-02 23:21:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:04,398 INFO L225 Difference]: With dead ends: 258 [2021-05-02 23:21:04,398 INFO L226 Difference]: Without dead ends: 252 [2021-05-02 23:21:04,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 7942.5ms TimeCoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:21:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-02 23:21:04,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-05-02 23:21:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0040650406504066) internal successors, (247), 246 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2021-05-02 23:21:04,404 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2021-05-02 23:21:04,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:04,405 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2021-05-02 23:21:04,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:04,405 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2021-05-02 23:21:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-02 23:21:04,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:04,406 INFO L523 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:04,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-02 23:21:04,406 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:04,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1489294635, now seen corresponding path program 119 times [2021-05-02 23:21:04,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:04,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924389484] [2021-05-02 23:21:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:04,411 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:04,412 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:12,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:12,653 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 23:21:12,653 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:12,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924389484] [2021-05-02 23:21:12,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [924389484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:12,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:12,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2021-05-02 23:21:12,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596933529] [2021-05-02 23:21:12,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-02 23:21:12,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:12,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-02 23:21:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:21:12,656 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:13,548 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2021-05-02 23:21:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-02 23:21:13,549 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2021-05-02 23:21:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:13,550 INFO L225 Difference]: With dead ends: 260 [2021-05-02 23:21:13,550 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 23:21:13,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 8090.0ms TimeCoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:21:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 23:21:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-05-02 23:21:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0040322580645162) internal successors, (249), 248 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2021-05-02 23:21:13,554 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2021-05-02 23:21:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:13,554 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2021-05-02 23:21:13,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2021-05-02 23:21:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-02 23:21:13,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:13,555 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:13,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-02 23:21:13,555 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash 147313037, now seen corresponding path program 120 times [2021-05-02 23:21:13,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:13,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984926680] [2021-05-02 23:21:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:13,559 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:13,560 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:22,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:22,103 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 23:21:22,103 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:22,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984926680] [2021-05-02 23:21:22,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [984926680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:22,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:22,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-02 23:21:22,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275784836] [2021-05-02 23:21:22,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 23:21:22,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:22,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 23:21:22,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:21:22,106 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:23,081 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2021-05-02 23:21:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 23:21:23,082 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2021-05-02 23:21:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:23,084 INFO L225 Difference]: With dead ends: 262 [2021-05-02 23:21:23,084 INFO L226 Difference]: Without dead ends: 256 [2021-05-02 23:21:23,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 8401.5ms TimeCoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:21:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-02 23:21:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-05-02 23:21:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.004) internal successors, (251), 250 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2021-05-02 23:21:23,089 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2021-05-02 23:21:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:23,090 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2021-05-02 23:21:23,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2021-05-02 23:21:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-05-02 23:21:23,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:23,091 INFO L523 BasicCegarLoop]: trace histogram [121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:23,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-02 23:21:23,091 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:23,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1006813841, now seen corresponding path program 121 times [2021-05-02 23:21:23,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:23,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134857846] [2021-05-02 23:21:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:23,097 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:23,098 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:31,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:31,446 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 23:21:31,446 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:31,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134857846] [2021-05-02 23:21:31,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [134857846] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:31,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:31,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2021-05-02 23:21:31,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497270771] [2021-05-02 23:21:31,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-02 23:21:31,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:31,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-02 23:21:31,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:21:31,448 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:32,434 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2021-05-02 23:21:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-02 23:21:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2021-05-02 23:21:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:32,436 INFO L225 Difference]: With dead ends: 264 [2021-05-02 23:21:32,436 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 23:21:32,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 8196.7ms TimeCoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:21:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 23:21:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-05-02 23:21:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.003968253968254) internal successors, (253), 252 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2021-05-02 23:21:32,441 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2021-05-02 23:21:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:32,441 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2021-05-02 23:21:32,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2021-05-02 23:21:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-05-02 23:21:32,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:32,443 INFO L523 BasicCegarLoop]: trace histogram [122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:32,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-02 23:21:32,443 INFO L428 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2021181231, now seen corresponding path program 122 times [2021-05-02 23:21:32,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:32,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540837181] [2021-05-02 23:21:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:32,449 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:32,450 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:41,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:41,627 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 23:21:41,627 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:41,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540837181] [2021-05-02 23:21:41,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1540837181] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:41,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:41,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2021-05-02 23:21:41,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884278797] [2021-05-02 23:21:41,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 23:21:41,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 23:21:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:21:41,630 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:42,329 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2021-05-02 23:21:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-02 23:21:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2021-05-02 23:21:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:42,331 INFO L225 Difference]: With dead ends: 266 [2021-05-02 23:21:42,331 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 23:21:42,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 9008.7ms TimeCoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:21:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 23:21:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-05-02 23:21:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0039370078740157) internal successors, (255), 254 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-05-02 23:21:42,335 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2021-05-02 23:21:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:42,336 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-05-02 23:21:42,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-05-02 23:21:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-02 23:21:42,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:42,336 INFO L523 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:42,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-02 23:21:42,337 INFO L428 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1870666829, now seen corresponding path program 123 times [2021-05-02 23:21:42,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:42,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887466428] [2021-05-02 23:21:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:42,341 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:42,342 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:52,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:52,248 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 23:21:52,248 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:52,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887466428] [2021-05-02 23:21:52,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1887466428] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:52,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:52,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2021-05-02 23:21:52,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699290639] [2021-05-02 23:21:52,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-02 23:21:52,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-02 23:21:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:21:52,251 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:53,254 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2021-05-02 23:21:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 23:21:53,256 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2021-05-02 23:21:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:53,257 INFO L225 Difference]: With dead ends: 268 [2021-05-02 23:21:53,257 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 23:21:53,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 9742.1ms TimeCoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:21:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 23:21:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-05-02 23:21:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.00390625) internal successors, (257), 256 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2021-05-02 23:21:53,261 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2021-05-02 23:21:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:53,261 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2021-05-02 23:21:53,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2021-05-02 23:21:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-02 23:21:53,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:53,262 INFO L523 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:53,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-02 23:21:53,262 INFO L428 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:53,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1039752725, now seen corresponding path program 124 times [2021-05-02 23:21:53,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:53,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858735840] [2021-05-02 23:21:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:53,267 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:53,268 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:02,911 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 23:22:02,911 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:02,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858735840] [2021-05-02 23:22:02,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1858735840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:02,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:02,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-02 23:22:02,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047408345] [2021-05-02 23:22:02,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 23:22:02,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:02,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 23:22:02,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:22:02,914 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:03,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:03,837 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2021-05-02 23:22:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-02 23:22:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2021-05-02 23:22:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:03,840 INFO L225 Difference]: With dead ends: 270 [2021-05-02 23:22:03,840 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 23:22:03,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 9465.3ms TimeCoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:22:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 23:22:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-05-02 23:22:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2021-05-02 23:22:03,844 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2021-05-02 23:22:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:03,845 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2021-05-02 23:22:03,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2021-05-02 23:22:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-05-02 23:22:03,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:03,845 INFO L523 BasicCegarLoop]: trace histogram [125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:03,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-02 23:22:03,846 INFO L428 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:03,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1929234423, now seen corresponding path program 125 times [2021-05-02 23:22:03,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:03,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720230802] [2021-05-02 23:22:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:03,850 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:03,851 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:13,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:13,896 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 23:22:13,897 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:13,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720230802] [2021-05-02 23:22:13,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720230802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:13,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:13,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2021-05-02 23:22:13,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531043627] [2021-05-02 23:22:13,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-02 23:22:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-02 23:22:13,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:22:13,900 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:14,823 INFO L93 Difference]: Finished difference Result 272 states and 272 transitions. [2021-05-02 23:22:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-02 23:22:14,824 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2021-05-02 23:22:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:14,825 INFO L225 Difference]: With dead ends: 272 [2021-05-02 23:22:14,825 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 23:22:14,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 9850.6ms TimeCoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:22:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 23:22:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-05-02 23:22:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0038461538461538) internal successors, (261), 260 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2021-05-02 23:22:14,831 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2021-05-02 23:22:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:14,831 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2021-05-02 23:22:14,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2021-05-02 23:22:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-05-02 23:22:14,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:14,832 INFO L523 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:14,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-02 23:22:14,832 INFO L428 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:14,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2022654297, now seen corresponding path program 126 times [2021-05-02 23:22:14,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:14,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424866664] [2021-05-02 23:22:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:14,843 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:14,844 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:25,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:25,866 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 23:22:25,867 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:25,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424866664] [2021-05-02 23:22:25,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [424866664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:25,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:25,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2021-05-02 23:22:25,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456095761] [2021-05-02 23:22:25,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 23:22:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:25,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 23:22:25,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:22:25,871 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:27,073 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2021-05-02 23:22:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 23:22:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2021-05-02 23:22:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:27,076 INFO L225 Difference]: With dead ends: 274 [2021-05-02 23:22:27,076 INFO L226 Difference]: Without dead ends: 268 [2021-05-02 23:22:27,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 10828.0ms TimeCoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:22:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-02 23:22:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2021-05-02 23:22:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0038167938931297) internal successors, (263), 262 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2021-05-02 23:22:27,082 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2021-05-02 23:22:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:27,082 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2021-05-02 23:22:27,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2021-05-02 23:22:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 23:22:27,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:27,083 INFO L523 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:27,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-02 23:22:27,084 INFO L428 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:27,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1604839995, now seen corresponding path program 127 times [2021-05-02 23:22:27,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:27,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777293770] [2021-05-02 23:22:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:27,089 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:27,090 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:37,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:37,887 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 23:22:37,888 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:37,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777293770] [2021-05-02 23:22:37,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777293770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:37,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:37,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2021-05-02 23:22:37,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459095163] [2021-05-02 23:22:37,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-02 23:22:37,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:37,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-02 23:22:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:22:37,890 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:39,217 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2021-05-02 23:22:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-02 23:22:39,219 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2021-05-02 23:22:39,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:39,221 INFO L225 Difference]: With dead ends: 276 [2021-05-02 23:22:39,221 INFO L226 Difference]: Without dead ends: 270 [2021-05-02 23:22:39,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 10612.0ms TimeCoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:22:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-02 23:22:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2021-05-02 23:22:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.003787878787879) internal successors, (265), 264 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2021-05-02 23:22:39,226 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2021-05-02 23:22:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:39,226 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2021-05-02 23:22:39,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2021-05-02 23:22:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-02 23:22:39,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:39,227 INFO L523 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:39,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-02 23:22:39,227 INFO L428 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:39,227 INFO L82 PathProgramCache]: Analyzing trace with hash -482745699, now seen corresponding path program 128 times [2021-05-02 23:22:39,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:39,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233601575] [2021-05-02 23:22:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:39,241 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:39,243 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:51,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:51,807 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 23:22:51,807 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:51,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233601575] [2021-05-02 23:22:51,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [233601575] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:51,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:51,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-02 23:22:51,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850914348] [2021-05-02 23:22:51,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 23:22:51,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:51,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 23:22:51,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:22:51,809 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:52,795 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2021-05-02 23:22:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 23:22:52,797 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2021-05-02 23:22:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:52,798 INFO L225 Difference]: With dead ends: 278 [2021-05-02 23:22:52,798 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 23:22:52,799 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 12349.5ms TimeCoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:22:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 23:22:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2021-05-02 23:22:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0037593984962405) internal successors, (267), 266 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2021-05-02 23:22:52,802 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2021-05-02 23:22:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:52,803 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2021-05-02 23:22:52,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2021-05-02 23:22:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-05-02 23:22:52,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:52,804 INFO L523 BasicCegarLoop]: trace histogram [129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:52,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-02 23:22:52,804 INFO L428 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:52,804 INFO L82 PathProgramCache]: Analyzing trace with hash -902870401, now seen corresponding path program 129 times [2021-05-02 23:22:52,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:52,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188403298] [2021-05-02 23:22:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:52,814 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:52,815 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:05,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:05,308 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 23:23:05,309 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:05,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188403298] [2021-05-02 23:23:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [188403298] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:05,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:05,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2021-05-02 23:23:05,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268019224] [2021-05-02 23:23:05,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2021-05-02 23:23:05,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-05-02 23:23:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:23:05,311 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:06,358 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2021-05-02 23:23:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-02 23:23:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2021-05-02 23:23:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:06,360 INFO L225 Difference]: With dead ends: 280 [2021-05-02 23:23:06,360 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 23:23:06,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 12269.9ms TimeCoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:23:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 23:23:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-05-02 23:23:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0037313432835822) internal successors, (269), 268 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2021-05-02 23:23:06,364 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2021-05-02 23:23:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:06,364 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2021-05-02 23:23:06,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2021-05-02 23:23:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-05-02 23:23:06,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:06,365 INFO L523 BasicCegarLoop]: trace histogram [130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:06,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-02 23:23:06,365 INFO L428 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:06,365 INFO L82 PathProgramCache]: Analyzing trace with hash -915783199, now seen corresponding path program 130 times [2021-05-02 23:23:06,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:06,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693113510] [2021-05-02 23:23:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:06,370 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:06,371 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:20,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:20,195 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 23:23:20,195 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:20,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693113510] [2021-05-02 23:23:20,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693113510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:20,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:20,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2021-05-02 23:23:20,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889105435] [2021-05-02 23:23:20,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 23:23:20,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:20,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 23:23:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:23:20,198 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:21,682 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2021-05-02 23:23:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 23:23:21,684 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 272 [2021-05-02 23:23:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:21,685 INFO L225 Difference]: With dead ends: 282 [2021-05-02 23:23:21,685 INFO L226 Difference]: Without dead ends: 276 [2021-05-02 23:23:21,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 13609.7ms TimeCoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:23:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-02 23:23:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-05-02 23:23:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0037037037037038) internal successors, (271), 270 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2021-05-02 23:23:21,689 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2021-05-02 23:23:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:21,690 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2021-05-02 23:23:21,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2021-05-02 23:23:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-02 23:23:21,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:21,691 INFO L523 BasicCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:21,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-02 23:23:21,691 INFO L428 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:21,691 INFO L82 PathProgramCache]: Analyzing trace with hash -440080189, now seen corresponding path program 131 times [2021-05-02 23:23:21,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:21,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213188497] [2021-05-02 23:23:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:21,705 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:21,706 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:35,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:35,377 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 23:23:35,377 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213188497] [2021-05-02 23:23:35,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [213188497] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:35,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:35,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2021-05-02 23:23:35,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198758646] [2021-05-02 23:23:35,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-02 23:23:35,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:35,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-02 23:23:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:23:35,380 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:36,980 INFO L93 Difference]: Finished difference Result 284 states and 284 transitions. [2021-05-02 23:23:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-02 23:23:36,982 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2021-05-02 23:23:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:36,983 INFO L225 Difference]: With dead ends: 284 [2021-05-02 23:23:36,983 INFO L226 Difference]: Without dead ends: 278 [2021-05-02 23:23:36,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 13445.1ms TimeCoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:23:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-02 23:23:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2021-05-02 23:23:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0036764705882353) internal successors, (273), 272 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2021-05-02 23:23:36,988 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2021-05-02 23:23:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:36,988 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2021-05-02 23:23:36,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2021-05-02 23:23:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-05-02 23:23:36,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:36,989 INFO L523 BasicCegarLoop]: trace histogram [132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:36,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-02 23:23:36,990 INFO L428 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:36,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1443979045, now seen corresponding path program 132 times [2021-05-02 23:23:36,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:36,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265954716] [2021-05-02 23:23:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:36,995 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:36,996 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:52,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:52,603 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 23:23:52,603 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:52,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265954716] [2021-05-02 23:23:52,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [265954716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:52,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:52,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2021-05-02 23:23:52,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532888706] [2021-05-02 23:23:52,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 23:23:52,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 23:23:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:23:52,606 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:54,221 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2021-05-02 23:23:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-02 23:23:54,224 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2021-05-02 23:23:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:54,226 INFO L225 Difference]: With dead ends: 286 [2021-05-02 23:23:54,226 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 23:23:54,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 15350.2ms TimeCoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:23:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 23:23:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2021-05-02 23:23:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0036496350364963) internal successors, (275), 274 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2021-05-02 23:23:54,231 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2021-05-02 23:23:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:54,232 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2021-05-02 23:23:54,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2021-05-02 23:23:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-05-02 23:23:54,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:54,233 INFO L523 BasicCegarLoop]: trace histogram [133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:54,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-02 23:23:54,233 INFO L428 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash -451295993, now seen corresponding path program 133 times [2021-05-02 23:23:54,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:54,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030999386] [2021-05-02 23:23:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:54,239 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:54,240 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:09,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:09,388 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 23:24:09,388 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:09,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030999386] [2021-05-02 23:24:09,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030999386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:09,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:09,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2021-05-02 23:24:09,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815508994] [2021-05-02 23:24:09,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-02 23:24:09,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:09,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-02 23:24:09,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:24:09,391 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:11,236 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2021-05-02 23:24:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-02 23:24:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2021-05-02 23:24:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:11,240 INFO L225 Difference]: With dead ends: 288 [2021-05-02 23:24:11,240 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 23:24:11,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 14870.9ms TimeCoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:24:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 23:24:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-05-02 23:24:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0036231884057971) internal successors, (277), 276 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2021-05-02 23:24:11,244 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2021-05-02 23:24:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:11,245 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2021-05-02 23:24:11,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2021-05-02 23:24:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-05-02 23:24:11,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:11,246 INFO L523 BasicCegarLoop]: trace histogram [134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:11,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-02 23:24:11,246 INFO L428 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:11,246 INFO L82 PathProgramCache]: Analyzing trace with hash -744474007, now seen corresponding path program 134 times [2021-05-02 23:24:11,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:11,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624635358] [2021-05-02 23:24:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:11,252 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:11,253 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:26,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:26,304 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 23:24:26,304 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:26,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624635358] [2021-05-02 23:24:26,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [624635358] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:26,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:26,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2021-05-02 23:24:26,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626355034] [2021-05-02 23:24:26,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 23:24:26,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 23:24:26,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:24:26,307 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:28,086 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2021-05-02 23:24:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-02 23:24:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2021-05-02 23:24:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:28,090 INFO L225 Difference]: With dead ends: 290 [2021-05-02 23:24:28,090 INFO L226 Difference]: Without dead ends: 284 [2021-05-02 23:24:28,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 14795.5ms TimeCoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:24:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-02 23:24:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2021-05-02 23:24:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0035971223021583) internal successors, (279), 278 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2021-05-02 23:24:28,096 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2021-05-02 23:24:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:28,096 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2021-05-02 23:24:28,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2021-05-02 23:24:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-05-02 23:24:28,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:28,098 INFO L523 BasicCegarLoop]: trace histogram [135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:28,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-02 23:24:28,098 INFO L428 AbstractCegarLoop]: === Iteration 137 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash 979296075, now seen corresponding path program 135 times [2021-05-02 23:24:28,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:28,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895966408] [2021-05-02 23:24:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:28,104 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:28,105 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:45,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:45,290 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 23:24:45,290 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:45,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895966408] [2021-05-02 23:24:45,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [895966408] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:45,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:45,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2021-05-02 23:24:45,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956919181] [2021-05-02 23:24:45,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2021-05-02 23:24:45,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-05-02 23:24:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:24:45,293 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:47,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:47,123 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2021-05-02 23:24:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-02 23:24:47,126 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2021-05-02 23:24:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:47,127 INFO L225 Difference]: With dead ends: 292 [2021-05-02 23:24:47,128 INFO L226 Difference]: Without dead ends: 286 [2021-05-02 23:24:47,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 16911.7ms TimeCoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:24:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-02 23:24:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-02 23:24:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0035714285714286) internal successors, (281), 280 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2021-05-02 23:24:47,133 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2021-05-02 23:24:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:47,133 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2021-05-02 23:24:47,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2021-05-02 23:24:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-02 23:24:47,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:47,134 INFO L523 BasicCegarLoop]: trace histogram [136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:47,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-02 23:24:47,134 INFO L428 AbstractCegarLoop]: === Iteration 138 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:47,135 INFO L82 PathProgramCache]: Analyzing trace with hash -335031379, now seen corresponding path program 136 times [2021-05-02 23:24:47,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:47,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284322099] [2021-05-02 23:24:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:47,140 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:47,141 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:06,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:06,730 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 23:25:06,731 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:06,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284322099] [2021-05-02 23:25:06,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [284322099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:06,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:06,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2021-05-02 23:25:06,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861898207] [2021-05-02 23:25:06,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-02 23:25:06,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:06,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-02 23:25:06,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:25:06,734 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:09,030 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2021-05-02 23:25:09,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-02 23:25:09,034 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2021-05-02 23:25:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:09,035 INFO L225 Difference]: With dead ends: 294 [2021-05-02 23:25:09,035 INFO L226 Difference]: Without dead ends: 288 [2021-05-02 23:25:09,036 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 19278.5ms TimeCoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:25:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-02 23:25:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2021-05-02 23:25:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.00354609929078) internal successors, (283), 282 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2021-05-02 23:25:09,040 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 284 [2021-05-02 23:25:09,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:09,041 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2021-05-02 23:25:09,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2021-05-02 23:25:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-05-02 23:25:09,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:09,042 INFO L523 BasicCegarLoop]: trace histogram [137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:09,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-02 23:25:09,042 INFO L428 AbstractCegarLoop]: === Iteration 139 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash -683329649, now seen corresponding path program 137 times [2021-05-02 23:25:09,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:09,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620448935] [2021-05-02 23:25:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:09,049 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:09,050 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:30,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:30,032 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 23:25:30,032 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:30,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620448935] [2021-05-02 23:25:30,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [620448935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:30,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:30,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2021-05-02 23:25:30,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948035076] [2021-05-02 23:25:30,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-02 23:25:30,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:30,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-02 23:25:30,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:25:30,035 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:32,232 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2021-05-02 23:25:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-02 23:25:32,235 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2021-05-02 23:25:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:32,236 INFO L225 Difference]: With dead ends: 296 [2021-05-02 23:25:32,236 INFO L226 Difference]: Without dead ends: 290 [2021-05-02 23:25:32,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 20625.0ms TimeCoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:25:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-02 23:25:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2021-05-02 23:25:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0035211267605635) internal successors, (285), 284 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2021-05-02 23:25:32,242 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 286 [2021-05-02 23:25:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:32,242 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2021-05-02 23:25:32,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2021-05-02 23:25:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-05-02 23:25:32,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:32,243 INFO L523 BasicCegarLoop]: trace histogram [138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:32,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-02 23:25:32,243 INFO L428 AbstractCegarLoop]: === Iteration 140 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:32,244 INFO L82 PathProgramCache]: Analyzing trace with hash -390518031, now seen corresponding path program 138 times [2021-05-02 23:25:32,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:32,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282628065] [2021-05-02 23:25:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:32,250 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:32,251 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:53,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:53,842 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 23:25:53,843 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:53,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282628065] [2021-05-02 23:25:53,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282628065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:53,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:53,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2021-05-02 23:25:53,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127719706] [2021-05-02 23:25:53,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-02 23:25:53,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:53,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-02 23:25:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:25:53,846 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:55,445 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2021-05-02 23:25:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-02 23:25:55,449 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 288 [2021-05-02 23:25:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:55,450 INFO L225 Difference]: With dead ends: 298 [2021-05-02 23:25:55,450 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 23:25:55,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 21258.4ms TimeCoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:25:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 23:25:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-05-02 23:25:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.0034965034965035) internal successors, (287), 286 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2021-05-02 23:25:55,455 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 288 [2021-05-02 23:25:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:55,455 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2021-05-02 23:25:55,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2021-05-02 23:25:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-02 23:25:55,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:55,456 INFO L523 BasicCegarLoop]: trace histogram [139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:55,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-02 23:25:55,456 INFO L428 AbstractCegarLoop]: === Iteration 141 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:55,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1828572627, now seen corresponding path program 139 times [2021-05-02 23:25:55,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:55,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124617801] [2021-05-02 23:25:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:55,462 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:55,463 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:18,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:18,923 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 23:26:18,923 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:18,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124617801] [2021-05-02 23:26:18,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2124617801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:18,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:18,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2021-05-02 23:26:18,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947202934] [2021-05-02 23:26:18,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 143 states [2021-05-02 23:26:18,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:18,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-05-02 23:26:18,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:26:18,927 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:20,610 INFO L93 Difference]: Finished difference Result 300 states and 300 transitions. [2021-05-02 23:26:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-05-02 23:26:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2021-05-02 23:26:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:20,615 INFO L225 Difference]: With dead ends: 300 [2021-05-02 23:26:20,615 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 23:26:20,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 23115.9ms TimeCoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:26:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 23:26:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2021-05-02 23:26:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0034722222222223) internal successors, (289), 288 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2021-05-02 23:26:20,620 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 290 [2021-05-02 23:26:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:20,620 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2021-05-02 23:26:20,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2021-05-02 23:26:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-05-02 23:26:20,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:20,622 INFO L523 BasicCegarLoop]: trace histogram [140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:20,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-02 23:26:20,622 INFO L428 AbstractCegarLoop]: === Iteration 142 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:20,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:20,622 INFO L82 PathProgramCache]: Analyzing trace with hash -224051147, now seen corresponding path program 140 times [2021-05-02 23:26:20,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:20,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480789614] [2021-05-02 23:26:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:20,629 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:20,630 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:45,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:45,158 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 23:26:45,158 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480789614] [2021-05-02 23:26:45,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [480789614] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:45,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:45,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2021-05-02 23:26:45,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384110605] [2021-05-02 23:26:45,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-02 23:26:45,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:45,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-02 23:26:45,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:26:45,161 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:47,395 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2021-05-02 23:26:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-05-02 23:26:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2021-05-02 23:26:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:47,399 INFO L225 Difference]: With dead ends: 302 [2021-05-02 23:26:47,399 INFO L226 Difference]: Without dead ends: 296 [2021-05-02 23:26:47,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 24137.6ms TimeCoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:26:47,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-02 23:26:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2021-05-02 23:26:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.0034482758620689) internal successors, (291), 290 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2021-05-02 23:26:47,404 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 292 [2021-05-02 23:26:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:47,404 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2021-05-02 23:26:47,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2021-05-02 23:26:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-05-02 23:26:47,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:47,405 INFO L523 BasicCegarLoop]: trace histogram [141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:47,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-05-02 23:26:47,406 INFO L428 AbstractCegarLoop]: === Iteration 143 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1405509097, now seen corresponding path program 141 times [2021-05-02 23:26:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:47,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574915290] [2021-05-02 23:26:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:47,419 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:47,420 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:11,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:11,295 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 23:27:11,296 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:11,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574915290] [2021-05-02 23:27:11,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574915290] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:11,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:11,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2021-05-02 23:27:11,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842994567] [2021-05-02 23:27:11,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 145 states [2021-05-02 23:27:11,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:11,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-05-02 23:27:11,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-02 23:27:11,299 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:13,666 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2021-05-02 23:27:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-05-02 23:27:13,670 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2021-05-02 23:27:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:13,671 INFO L225 Difference]: With dead ends: 304 [2021-05-02 23:27:13,671 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 23:27:13,672 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 23521.4ms TimeCoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2021-05-02 23:27:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 23:27:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2021-05-02 23:27:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0034246575342465) internal successors, (293), 292 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2021-05-02 23:27:13,677 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 294 [2021-05-02 23:27:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:13,677 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2021-05-02 23:27:13,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2021-05-02 23:27:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-05-02 23:27:13,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:13,678 INFO L523 BasicCegarLoop]: trace histogram [142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:13,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-02 23:27:13,678 INFO L428 AbstractCegarLoop]: === Iteration 144 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:13,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734393, now seen corresponding path program 142 times [2021-05-02 23:27:13,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:13,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297566918] [2021-05-02 23:27:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:13,685 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:13,686 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:39,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:39,747 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 23:27:39,747 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297566918] [2021-05-02 23:27:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [297566918] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:39,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:39,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2021-05-02 23:27:39,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088355321] [2021-05-02 23:27:39,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 146 states [2021-05-02 23:27:39,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:39,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-05-02 23:27:39,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2021-05-02 23:27:39,750 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:42,407 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2021-05-02 23:27:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-05-02 23:27:42,412 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2021-05-02 23:27:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:42,413 INFO L225 Difference]: With dead ends: 306 [2021-05-02 23:27:42,413 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 23:27:42,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 25696.6ms TimeCoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2021-05-02 23:27:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 23:27:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2021-05-02 23:27:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0034013605442176) internal successors, (295), 294 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2021-05-02 23:27:42,420 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 296 [2021-05-02 23:27:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:42,421 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2021-05-02 23:27:42,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2021-05-02 23:27:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-05-02 23:27:42,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:42,423 INFO L523 BasicCegarLoop]: trace histogram [143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:42,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-05-02 23:27:42,423 INFO L428 AbstractCegarLoop]: === Iteration 145 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:42,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2060864421, now seen corresponding path program 143 times [2021-05-02 23:27:42,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:42,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490193399] [2021-05-02 23:27:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:42,431 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:42,432 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:09,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:09,304 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 23:28:09,304 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490193399] [2021-05-02 23:28:09,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [490193399] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:09,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:09,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2021-05-02 23:28:09,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367985710] [2021-05-02 23:28:09,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 147 states [2021-05-02 23:28:09,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:09,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-05-02 23:28:09,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2021-05-02 23:28:09,308 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:11,449 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2021-05-02 23:28:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-05-02 23:28:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2021-05-02 23:28:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:11,453 INFO L225 Difference]: With dead ends: 308 [2021-05-02 23:28:11,453 INFO L226 Difference]: Without dead ends: 302 [2021-05-02 23:28:11,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 26439.8ms TimeCoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2021-05-02 23:28:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-02 23:28:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2021-05-02 23:28:11,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0033783783783783) internal successors, (297), 296 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2021-05-02 23:28:11,459 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 298 [2021-05-02 23:28:11,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:11,459 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2021-05-02 23:28:11,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:11,459 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2021-05-02 23:28:11,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-05-02 23:28:11,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:11,460 INFO L523 BasicCegarLoop]: trace histogram [144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:11,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-05-02 23:28:11,461 INFO L428 AbstractCegarLoop]: === Iteration 146 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:11,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:11,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1351506755, now seen corresponding path program 144 times [2021-05-02 23:28:11,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:11,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406076879] [2021-05-02 23:28:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:11,475 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:11,476 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat