/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-industry-pattern/nested-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:49:09,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:49:09,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:49:09,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:49:09,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:49:09,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:49:09,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:49:09,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:49:09,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:49:09,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:49:09,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:49:09,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:49:09,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:49:09,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:49:09,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:49:09,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:49:09,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 23:49:09,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:49:09,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:49:09,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:49:09,328 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 23:49:09,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:49:09,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:49:09,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:49:09,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:49:09,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:49:09,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:49:09,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:49:09,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:49:09,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:49:09,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:49:09,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:49:09,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:49:09,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:49:09,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:49:09,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:49:09,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:49:09,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:49:09,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:49:09,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:49:09,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:49:09,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:49:09,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:49:09,356 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:49:09,356 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:49:09,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:49:09,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:49:09,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:49:09,733 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:49:09,733 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:49:09,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2021-05-02 23:49:09,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/075bf094c/1a090aa8992a4a989f91d59e79a8a4d7/FLAG6a5e00815 [2021-05-02 23:49:10,307 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:49:10,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested-3.c [2021-05-02 23:49:10,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/075bf094c/1a090aa8992a4a989f91d59e79a8a4d7/FLAG6a5e00815 [2021-05-02 23:49:10,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/075bf094c/1a090aa8992a4a989f91d59e79a8a4d7 [2021-05-02 23:49:10,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:49:10,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:49:10,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:49:10,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:49:10,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:49:10,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:49:10" (1/1) ... [2021-05-02 23:49:10,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73128bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:10, skipping insertion in model container [2021-05-02 23:49:10,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:49:10" (1/1) ... [2021-05-02 23:49:10,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:49:10,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:49:10,958 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-industry-pattern/nested-3.c[404,417] [2021-05-02 23:49:10,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:49:10,982 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:49:10,993 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-industry-pattern/nested-3.c[404,417] [2021-05-02 23:49:10,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:49:11,048 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:49:11,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11 WrapperNode [2021-05-02 23:49:11,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:49:11,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:49:11,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:49:11,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:49:11,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11" (1/1) ... [2021-05-02 23:49:11,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11" (1/1) ... [2021-05-02 23:49:11,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11" (1/1) ... [2021-05-02 23:49:11,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11" (1/1) ... [2021-05-02 23:49:11,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11" (1/1) ... [2021-05-02 23:49:11,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11" (1/1) ... [2021-05-02 23:49:11,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11" (1/1) ... [2021-05-02 23:49:11,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:49:11,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:49:11,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:49:11,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:49:11,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:49:11,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:49:11,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:49:11,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:49:11,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:49:11,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:49:11,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:49:11,182 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:49:11,182 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:49:11,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:49:11,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:49:11,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:49:11,183 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:49:11,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:49:11,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:49:11,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:49:11,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:49:11,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:49:11,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:49:11,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:49:11,583 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 23:49:11,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:49:11 BoogieIcfgContainer [2021-05-02 23:49:11,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:49:11,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:49:11,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:49:11,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:49:11,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:49:10" (1/3) ... [2021-05-02 23:49:11,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140e7365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:49:11, skipping insertion in model container [2021-05-02 23:49:11,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:11" (2/3) ... [2021-05-02 23:49:11,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140e7365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:49:11, skipping insertion in model container [2021-05-02 23:49:11,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:49:11" (3/3) ... [2021-05-02 23:49:11,605 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2021-05-02 23:49:11,625 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:49:11,631 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:49:11,687 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:49:11,744 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:49:11,745 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:49:11,745 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:49:11,745 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:49:11,745 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:49:11,745 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:49:11,745 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:49:11,746 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:49:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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 23:49:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:49:11,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:11,804 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:11,807 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1677248157, now seen corresponding path program 1 times [2021-05-02 23:49:11,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:11,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093758646] [2021-05-02 23:49:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:11,933 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:49:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:12,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:12,377 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 23:49:12,381 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:12,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093758646] [2021-05-02 23:49:12,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2093758646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:12,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:12,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:49:12,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662625157] [2021-05-02 23:49:12,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:49:12,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:12,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:49:12,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:49:12,426 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 17 states have internal predecessors, (24), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 23:49:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:12,662 INFO L93 Difference]: Finished difference Result 40 states and 61 transitions. [2021-05-02 23:49:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:49:12,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 23:49:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:12,682 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:49:12,682 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 23:49:12,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:49:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 23:49:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-05-02 23:49:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-05-02 23:49:12,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2021-05-02 23:49:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:12,752 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-05-02 23:49:12,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 23:49:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-05-02 23:49:12,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:49:12,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:12,754 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:12,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:49:12,755 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:12,756 INFO L82 PathProgramCache]: Analyzing trace with hash -946078686, now seen corresponding path program 1 times [2021-05-02 23:49:12,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:12,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817270346] [2021-05-02 23:49:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:12,857 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_16 200000) (= v_~last~0_13 v_main_~c~0_16)) InVars {main_~c~0=v_main_~c~0_16, ~last~0=v_~last~0_13} OutVars{main_~c~0=v_main_~c~0_16, ~last~0=v_~last~0_13} AuxVars[] AssignedVars[] [2021-05-02 23:49:12,883 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:12,892 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:12,927 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:12,971 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:12,988 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:13,029 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:13,060 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:13,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:13,247 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:13,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817270346] [2021-05-02 23:49:13,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [817270346] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:13,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:13,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:49:13,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058687336] [2021-05-02 23:49:13,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:49:13,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:49:13,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:49:13,251 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:13,697 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-02 23:49:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:49:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 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 17 [2021-05-02 23:49:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:13,705 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:49:13,706 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 23:49:13,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:49:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 23:49:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-05-02 23:49:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-05-02 23:49:13,739 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2021-05-02 23:49:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:13,739 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-05-02 23:49:13,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-05-02 23:49:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:49:13,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:13,741 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:13,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:49:13,742 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:13,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:13,742 INFO L82 PathProgramCache]: Analyzing trace with hash -944231644, now seen corresponding path program 1 times [2021-05-02 23:49:13,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:13,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253226296] [2021-05-02 23:49:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:13,776 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_14 v_main_~c~0_20) (< v_main_~c~0_20 200000)) InVars {main_~c~0=v_main_~c~0_20, ~last~0=v_~last~0_14} OutVars{main_~c~0=v_main_~c~0_20, ~last~0=v_~last~0_14} AuxVars[] AssignedVars[] [2021-05-02 23:49:13,798 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:13,847 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:13,856 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:13,892 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:13,898 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:13,903 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:13,927 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:14,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:14,158 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:14,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253226296] [2021-05-02 23:49:14,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253226296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:14,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:14,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:49:14,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935684004] [2021-05-02 23:49:14,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:49:14,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:14,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:49:14,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:49:14,162 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:14,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:14,370 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2021-05-02 23:49:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:49:14,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 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 17 [2021-05-02 23:49:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:14,374 INFO L225 Difference]: With dead ends: 53 [2021-05-02 23:49:14,375 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 23:49:14,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:49:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 23:49:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-05-02 23:49:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-05-02 23:49:14,398 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-05-02 23:49:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:14,399 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-05-02 23:49:14,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-05-02 23:49:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:49:14,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:14,403 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:14,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:49:14,403 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash -206914972, now seen corresponding path program 1 times [2021-05-02 23:49:14,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:14,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494280100] [2021-05-02 23:49:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:14,416 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_24 200000) (not (= v_~last~0_15 v_main_~c~0_24))) InVars {main_~c~0=v_main_~c~0_24, ~last~0=v_~last~0_15} OutVars{main_~c~0=v_main_~c~0_24, ~last~0=v_~last~0_15} AuxVars[] AssignedVars[] [2021-05-02 23:49:14,438 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:14,480 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:14,496 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:14,566 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:14,583 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:14,630 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:14,691 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:14,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:15,211 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:15,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494280100] [2021-05-02 23:49:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1494280100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:15,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:15,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:49:15,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039755658] [2021-05-02 23:49:15,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:49:15,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:49:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:49:15,221 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:15,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:15,514 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-05-02 23:49:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:49:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 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 17 [2021-05-02 23:49:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:15,517 INFO L225 Difference]: With dead ends: 65 [2021-05-02 23:49:15,517 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:49:15,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:49:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:49:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-05-02 23:49:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-05-02 23:49:15,527 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2021-05-02 23:49:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:15,527 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-05-02 23:49:15,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-05-02 23:49:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:49:15,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:15,529 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:15,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:49:15,529 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2068588025, now seen corresponding path program 1 times [2021-05-02 23:49:15,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:15,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117126041] [2021-05-02 23:49:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:15,549 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_16 v_main_~c~0_28) (< v_main_~c~0_28 199999)) InVars {main_~c~0=v_main_~c~0_28, ~last~0=v_~last~0_16} OutVars{main_~c~0=v_main_~c~0_28, ~last~0=v_~last~0_16} AuxVars[] AssignedVars[] [2021-05-02 23:49:15,558 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:15,590 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:15,597 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:15,618 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:15,622 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:15,625 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:15,638 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:15,644 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_17 v_main_~c~0_30)) (< v_main_~c~0_30 200000)) InVars {main_~c~0=v_main_~c~0_30, ~last~0=v_~last~0_17} OutVars{main_~c~0=v_main_~c~0_30, ~last~0=v_~last~0_17} AuxVars[] AssignedVars[] [2021-05-02 23:49:15,650 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:15,653 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:15,660 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:15,685 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:15,699 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:15,757 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:15,799 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_32 200000) (= v_~last~0_18 v_main_~c~0_32)) InVars {main_~c~0=v_main_~c~0_32, ~last~0=v_~last~0_18} OutVars{main_~c~0=v_main_~c~0_32, ~last~0=v_~last~0_18} AuxVars[] AssignedVars[] [2021-05-02 23:49:15,805 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:15,845 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:15,857 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:15,888 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:15,893 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:15,897 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:15,913 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:16,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:16,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:16,195 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:16,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117126041] [2021-05-02 23:49:16,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2117126041] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:16,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:16,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:49:16,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350767524] [2021-05-02 23:49:16,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:49:16,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:16,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:49:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:49:16,210 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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 23:49:16,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:16,394 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-05-02 23:49:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:49:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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 23:49:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:16,396 INFO L225 Difference]: With dead ends: 59 [2021-05-02 23:49:16,397 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:49:16,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:49:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:49:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-05-02 23:49:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-05-02 23:49:16,416 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 20 [2021-05-02 23:49:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:16,417 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-05-02 23:49:16,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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 23:49:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-05-02 23:49:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:49:16,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:16,419 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:16,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:49:16,420 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1753164285, now seen corresponding path program 2 times [2021-05-02 23:49:16,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:16,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582881685] [2021-05-02 23:49:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:16,433 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_19 v_main_~c~0_38)) (< v_main_~c~0_38 199999)) InVars {main_~c~0=v_main_~c~0_38, ~last~0=v_~last~0_19} OutVars{main_~c~0=v_main_~c~0_38, ~last~0=v_~last~0_19} AuxVars[] AssignedVars[] [2021-05-02 23:49:16,438 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:16,441 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:16,449 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:16,479 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:16,495 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:16,549 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:16,583 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:16,590 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_20 v_main_~c~0_40)) (< v_main_~c~0_40 200000)) InVars {main_~c~0=v_main_~c~0_40, ~last~0=v_~last~0_20} OutVars{main_~c~0=v_main_~c~0_40, ~last~0=v_~last~0_20} AuxVars[] AssignedVars[] [2021-05-02 23:49:16,595 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:16,619 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:16,624 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:16,648 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:16,663 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:16,696 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:16,733 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:16,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:17,180 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:17,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582881685] [2021-05-02 23:49:17,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [582881685] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:17,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:17,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:49:17,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946854119] [2021-05-02 23:49:17,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:49:17,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:49:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:49:17,187 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 12 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 23:49:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:17,491 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-05-02 23:49:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:49:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 12 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 23:49:17,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:17,493 INFO L225 Difference]: With dead ends: 78 [2021-05-02 23:49:17,494 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:49:17,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:49:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:49:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2021-05-02 23:49:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-05-02 23:49:17,504 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2021-05-02 23:49:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:17,504 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-05-02 23:49:17,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 12 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 23:49:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-05-02 23:49:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:49:17,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:17,506 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:17,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:49:17,506 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1319592892, now seen corresponding path program 2 times [2021-05-02 23:49:17,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:17,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136720069] [2021-05-02 23:49:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:17,522 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_21 v_main_~c~0_45)) (< v_main_~c~0_45 199999)) InVars {main_~c~0=v_main_~c~0_45, ~last~0=v_~last~0_21} OutVars{main_~c~0=v_main_~c~0_45, ~last~0=v_~last~0_21} AuxVars[] AssignedVars[] [2021-05-02 23:49:17,527 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:17,555 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,561 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,584 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:17,597 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:17,633 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:17,673 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_22 v_main_~c~0_47) (< v_main_~c~0_47 199999)) InVars {main_~c~0=v_main_~c~0_47, ~last~0=v_~last~0_22} OutVars{main_~c~0=v_main_~c~0_47, ~last~0=v_~last~0_22} AuxVars[] AssignedVars[] [2021-05-02 23:49:17,678 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:17,681 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,687 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,707 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:17,712 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:17,740 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:17,753 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:17,758 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_23 v_main_~c~0_49)) (< v_main_~c~0_49 200000)) InVars {main_~c~0=v_main_~c~0_49, ~last~0=v_~last~0_23} OutVars{main_~c~0=v_main_~c~0_49, ~last~0=v_~last~0_23} AuxVars[] AssignedVars[] [2021-05-02 23:49:17,762 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:17,785 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,791 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,811 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:17,822 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:17,852 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:17,889 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_51 200000) (= v_~last~0_24 v_main_~c~0_51)) InVars {main_~c~0=v_main_~c~0_51, ~last~0=v_~last~0_24} OutVars{main_~c~0=v_main_~c~0_51, ~last~0=v_~last~0_24} AuxVars[] AssignedVars[] [2021-05-02 23:49:17,893 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:17,920 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,925 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:17,946 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:17,951 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:17,958 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:17,971 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:18,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:18,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:18,190 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:18,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136720069] [2021-05-02 23:49:18,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136720069] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:18,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:18,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:49:18,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970041006] [2021-05-02 23:49:18,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:49:18,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:49:18,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:49:18,193 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:18,365 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-05-02 23:49:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:49:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 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 23 [2021-05-02 23:49:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:18,367 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:49:18,367 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:49:18,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:49:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:49:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-05-02 23:49:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 23:49:18,378 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2021-05-02 23:49:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:18,379 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 23:49:18,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 23:49:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 23:49:18,380 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:18,380 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:18,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:49:18,380 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:18,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1752769028, now seen corresponding path program 3 times [2021-05-02 23:49:18,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:18,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769392109] [2021-05-02 23:49:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:18,389 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_58 199999) (not (= v_~last~0_25 v_main_~c~0_58))) InVars {main_~c~0=v_main_~c~0_58, ~last~0=v_~last~0_25} OutVars{main_~c~0=v_main_~c~0_58, ~last~0=v_~last~0_25} AuxVars[] AssignedVars[] [2021-05-02 23:49:18,393 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:18,396 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:18,400 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:18,420 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:18,430 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:18,499 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:18,526 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:18,530 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_60 200000) (not (= v_~last~0_26 v_main_~c~0_60))) InVars {main_~c~0=v_main_~c~0_60, ~last~0=v_~last~0_26} OutVars{main_~c~0=v_main_~c~0_60, ~last~0=v_~last~0_26} AuxVars[] AssignedVars[] [2021-05-02 23:49:18,534 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:18,553 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:18,558 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:18,578 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:18,587 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:18,614 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:18,643 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:18,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:19,103 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:19,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769392109] [2021-05-02 23:49:19,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1769392109] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:19,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:19,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:49:19,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427024572] [2021-05-02 23:49:19,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:49:19,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:19,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:49:19,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:49:19,106 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:19,474 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2021-05-02 23:49:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:49:19,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (3), 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 23 [2021-05-02 23:49:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:19,477 INFO L225 Difference]: With dead ends: 91 [2021-05-02 23:49:19,477 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:49:19,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 438.5ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:49:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:49:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2021-05-02 23:49:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-05-02 23:49:19,490 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2021-05-02 23:49:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:19,490 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-05-02 23:49:19,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-05-02 23:49:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:49:19,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:19,492 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:19,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:49:19,493 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash -360688409, now seen corresponding path program 3 times [2021-05-02 23:49:19,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:19,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918169565] [2021-05-02 23:49:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:19,505 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_66 199999) (not (= v_~last~0_27 v_main_~c~0_66))) InVars {main_~c~0=v_main_~c~0_66, ~last~0=v_~last~0_27} OutVars{main_~c~0=v_main_~c~0_66, ~last~0=v_~last~0_27} AuxVars[] AssignedVars[] [2021-05-02 23:49:19,510 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:19,531 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:19,540 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:19,560 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:19,572 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:19,599 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:19,635 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_68 199999) (= v_~last~0_28 v_main_~c~0_68)) InVars {main_~c~0=v_main_~c~0_68, ~last~0=v_~last~0_28} OutVars{main_~c~0=v_main_~c~0_68, ~last~0=v_~last~0_28} AuxVars[] AssignedVars[] [2021-05-02 23:49:19,641 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:19,644 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:19,651 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:19,666 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:19,670 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:19,689 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:19,701 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:19,705 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_70 200000) (not (= v_~last~0_29 v_main_~c~0_70))) InVars {main_~c~0=v_main_~c~0_70, ~last~0=v_~last~0_29} OutVars{main_~c~0=v_main_~c~0_70, ~last~0=v_~last~0_29} AuxVars[] AssignedVars[] [2021-05-02 23:49:19,709 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:19,731 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:19,736 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:19,757 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:19,768 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:19,814 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:19,851 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_30 v_main_~c~0_72) (< v_main_~c~0_72 200000)) InVars {main_~c~0=v_main_~c~0_72, ~last~0=v_~last~0_30} OutVars{main_~c~0=v_main_~c~0_72, ~last~0=v_~last~0_30} AuxVars[] AssignedVars[] [2021-05-02 23:49:19,856 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:19,859 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:19,863 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:19,888 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:19,892 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:19,912 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:19,925 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:19,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:20,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:20,205 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:20,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918169565] [2021-05-02 23:49:20,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [918169565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:20,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:20,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:49:20,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864619032] [2021-05-02 23:49:20,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:49:20,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:20,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:49:20,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:49:20,209 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 23:49:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:20,438 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-05-02 23:49:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:49:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 23:49:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:20,440 INFO L225 Difference]: With dead ends: 77 [2021-05-02 23:49:20,440 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 23:49:20,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:49:20,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 23:49:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-05-02 23:49:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-05-02 23:49:20,466 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 26 [2021-05-02 23:49:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:20,466 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-05-02 23:49:20,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 23:49:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-05-02 23:49:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:49:20,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:20,467 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:20,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:49:20,468 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:20,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1997392483, now seen corresponding path program 4 times [2021-05-02 23:49:20,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:20,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358108208] [2021-05-02 23:49:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:20,479 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_31 v_main_~c~0_80)) (< v_main_~c~0_80 199999)) InVars {main_~c~0=v_main_~c~0_80, ~last~0=v_~last~0_31} OutVars{main_~c~0=v_main_~c~0_80, ~last~0=v_~last~0_31} AuxVars[] AssignedVars[] [2021-05-02 23:49:20,483 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:20,485 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,488 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,507 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:20,516 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:20,560 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:20,589 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:20,593 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_82 200000) (not (= v_~last~0_32 v_main_~c~0_82))) InVars {main_~c~0=v_main_~c~0_82, ~last~0=v_~last~0_32} OutVars{main_~c~0=v_main_~c~0_82, ~last~0=v_~last~0_32} AuxVars[] AssignedVars[] [2021-05-02 23:49:20,603 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:20,605 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,610 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:20,630 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:20,641 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:20,685 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:20,716 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:20,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:21,250 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:21,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358108208] [2021-05-02 23:49:21,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358108208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:21,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:21,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:49:21,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495461262] [2021-05-02 23:49:21,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:49:21,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:21,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:49:21,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:49:21,254 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 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 23:49:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:21,760 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2021-05-02 23:49:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:49:21,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 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 23:49:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:21,763 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:49:21,764 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:49:21,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:49:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:49:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 48. [2021-05-02 23:49:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:21,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-05-02 23:49:21,789 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 26 [2021-05-02 23:49:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:21,790 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-05-02 23:49:21,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 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 23:49:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-05-02 23:49:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:49:21,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:21,794 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:21,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:49:21,795 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:21,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:21,796 INFO L82 PathProgramCache]: Analyzing trace with hash 535278948, now seen corresponding path program 4 times [2021-05-02 23:49:21,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:21,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876893384] [2021-05-02 23:49:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:21,815 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_89 199999) (not (= v_~last~0_33 v_main_~c~0_89))) InVars {main_~c~0=v_main_~c~0_89, ~last~0=v_~last~0_33} OutVars{main_~c~0=v_main_~c~0_89, ~last~0=v_~last~0_33} AuxVars[] AssignedVars[] [2021-05-02 23:49:21,819 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:21,838 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:21,842 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:21,859 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:21,869 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:21,892 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:21,928 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_34 v_main_~c~0_91) (< v_main_~c~0_91 199999)) InVars {main_~c~0=v_main_~c~0_91, ~last~0=v_~last~0_34} OutVars{main_~c~0=v_main_~c~0_91, ~last~0=v_~last~0_34} AuxVars[] AssignedVars[] [2021-05-02 23:49:21,933 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:21,936 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:21,942 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:21,966 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:21,970 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:21,989 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:22,002 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:22,005 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_35 v_main_~c~0_93)) (< v_main_~c~0_93 200000)) InVars {main_~c~0=v_main_~c~0_93, ~last~0=v_~last~0_35} OutVars{main_~c~0=v_main_~c~0_93, ~last~0=v_~last~0_35} AuxVars[] AssignedVars[] [2021-05-02 23:49:22,009 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:22,028 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:22,034 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:22,059 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:22,070 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:22,096 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:22,133 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_36 v_main_~c~0_95) (< v_main_~c~0_95 200000)) InVars {main_~c~0=v_main_~c~0_95, ~last~0=v_~last~0_36} OutVars{main_~c~0=v_main_~c~0_95, ~last~0=v_~last~0_36} AuxVars[] AssignedVars[] [2021-05-02 23:49:22,138 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:22,163 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:22,170 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:22,184 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:22,187 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:22,190 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:22,202 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:22,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:22,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:22,523 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:22,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876893384] [2021-05-02 23:49:22,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876893384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:22,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:22,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:49:22,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853697598] [2021-05-02 23:49:22,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:49:22,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:22,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:49:22,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:49:22,525 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:22,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:22,773 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-05-02 23:49:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:49:22,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 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 29 [2021-05-02 23:49:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:22,776 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:49:22,776 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:49:22,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:49:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:49:22,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-05-02 23:49:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-05-02 23:49:22,810 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 29 [2021-05-02 23:49:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:22,810 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-05-02 23:49:22,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-05-02 23:49:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 23:49:22,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:22,821 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:22,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:49:22,822 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:22,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1015239076, now seen corresponding path program 5 times [2021-05-02 23:49:22,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:22,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502605011] [2021-05-02 23:49:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:22,832 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_37 v_main_~c~0_104)) (< v_main_~c~0_104 199999)) InVars {main_~c~0=v_main_~c~0_104, ~last~0=v_~last~0_37} OutVars{main_~c~0=v_main_~c~0_104, ~last~0=v_~last~0_37} AuxVars[] AssignedVars[] [2021-05-02 23:49:22,836 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:22,857 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:22,868 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:22,890 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:22,899 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:22,931 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:22,963 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:22,966 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_38 v_main_~c~0_106)) (< v_main_~c~0_106 200000)) InVars {main_~c~0=v_main_~c~0_106, ~last~0=v_~last~0_38} OutVars{main_~c~0=v_main_~c~0_106, ~last~0=v_~last~0_38} AuxVars[] AssignedVars[] [2021-05-02 23:49:22,971 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:22,973 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:22,978 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:23,003 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:23,018 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:23,100 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:23,123 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:23,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:23,248 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 23:49:23,674 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:23,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502605011] [2021-05-02 23:49:23,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [502605011] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:23,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:23,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:49:23,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253091903] [2021-05-02 23:49:23,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:49:23,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:23,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:49:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:49:23,676 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:24,262 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2021-05-02 23:49:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:49:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 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 29 [2021-05-02 23:49:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:24,266 INFO L225 Difference]: With dead ends: 117 [2021-05-02 23:49:24,266 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 23:49:24,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 631.4ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:49:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 23:49:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 54. [2021-05-02 23:49:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-02 23:49:24,279 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 29 [2021-05-02 23:49:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:24,279 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-02 23:49:24,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-02 23:49:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 23:49:24,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:24,281 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:24,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:49:24,282 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash -922933305, now seen corresponding path program 5 times [2021-05-02 23:49:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:24,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744235514] [2021-05-02 23:49:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:24,294 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_114 199999) (not (= v_~last~0_39 v_main_~c~0_114))) InVars {main_~c~0=v_main_~c~0_114, ~last~0=v_~last~0_39} OutVars{main_~c~0=v_main_~c~0_114, ~last~0=v_~last~0_39} AuxVars[] AssignedVars[] [2021-05-02 23:49:24,298 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:24,300 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:24,304 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:24,324 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:24,334 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:24,380 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:24,411 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_40 v_main_~c~0_116) (< v_main_~c~0_116 199999)) InVars {main_~c~0=v_main_~c~0_116, ~last~0=v_~last~0_40} OutVars{main_~c~0=v_main_~c~0_116, ~last~0=v_~last~0_40} AuxVars[] AssignedVars[] [2021-05-02 23:49:24,415 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:24,417 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:24,422 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:24,439 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:24,442 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:24,477 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:24,501 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:24,504 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_118 200000) (not (= v_~last~0_41 v_main_~c~0_118))) InVars {main_~c~0=v_main_~c~0_118, ~last~0=v_~last~0_41} OutVars{main_~c~0=v_main_~c~0_118, ~last~0=v_~last~0_41} AuxVars[] AssignedVars[] [2021-05-02 23:49:24,508 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:24,509 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:24,518 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:24,535 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:24,544 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:24,589 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:24,634 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_42 v_main_~c~0_120) (< v_main_~c~0_120 200000)) InVars {main_~c~0=v_main_~c~0_120, ~last~0=v_~last~0_42} OutVars{main_~c~0=v_main_~c~0_120, ~last~0=v_~last~0_42} AuxVars[] AssignedVars[] [2021-05-02 23:49:24,637 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:24,639 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:24,644 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:24,658 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:24,661 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:24,679 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:24,690 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:24,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:24,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:25,479 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:25,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744235514] [2021-05-02 23:49:25,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [744235514] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:25,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:25,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:49:25,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034150455] [2021-05-02 23:49:25,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:49:25,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:49:25,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:49:25,482 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 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 23:49:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:25,933 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2021-05-02 23:49:25,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:49:25,933 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 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 23:49:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:25,934 INFO L225 Difference]: With dead ends: 136 [2021-05-02 23:49:25,935 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:49:25,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 732.5ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:49:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:49:25,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 78. [2021-05-02 23:49:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 71 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-05-02 23:49:25,959 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 32 [2021-05-02 23:49:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:25,959 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-05-02 23:49:25,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 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 23:49:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-05-02 23:49:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 23:49:25,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:25,960 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:25,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:49:25,961 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:25,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:25,962 INFO L82 PathProgramCache]: Analyzing trace with hash -999688509, now seen corresponding path program 6 times [2021-05-02 23:49:25,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:25,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607363520] [2021-05-02 23:49:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:25,976 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_43 v_main_~c~0_130)) (< v_main_~c~0_130 199999)) InVars {main_~c~0=v_main_~c~0_130, ~last~0=v_~last~0_43} OutVars{main_~c~0=v_main_~c~0_130, ~last~0=v_~last~0_43} AuxVars[] AssignedVars[] [2021-05-02 23:49:25,998 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:26,016 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:26,019 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:26,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:26,054 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:26,095 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:26,129 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:26,133 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_132 200000) (not (= v_~last~0_44 v_main_~c~0_132))) InVars {main_~c~0=v_main_~c~0_132, ~last~0=v_~last~0_44} OutVars{main_~c~0=v_main_~c~0_132, ~last~0=v_~last~0_44} AuxVars[] AssignedVars[] [2021-05-02 23:49:26,141 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:26,143 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:26,149 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:26,164 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:26,175 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:26,211 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:26,239 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:26,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:26,943 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:26,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607363520] [2021-05-02 23:49:26,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [607363520] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:26,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:26,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:49:26,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264883938] [2021-05-02 23:49:26,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:49:26,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:26,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:49:26,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:49:26,946 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 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 23:49:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:27,683 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2021-05-02 23:49:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:49:27,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 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 23:49:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:27,691 INFO L225 Difference]: With dead ends: 144 [2021-05-02 23:49:27,691 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 23:49:27,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 818.1ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:49:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 23:49:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2021-05-02 23:49:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 74 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2021-05-02 23:49:27,718 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 32 [2021-05-02 23:49:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:27,718 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2021-05-02 23:49:27,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 20 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 23:49:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2021-05-02 23:49:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:49:27,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:27,721 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:27,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:49:27,722 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1070036612, now seen corresponding path program 6 times [2021-05-02 23:49:27,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:27,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931215169] [2021-05-02 23:49:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:27,734 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_45 v_main_~c~0_141)) (< v_main_~c~0_141 199999)) InVars {main_~c~0=v_main_~c~0_141, ~last~0=v_~last~0_45} OutVars{main_~c~0=v_main_~c~0_141, ~last~0=v_~last~0_45} AuxVars[] AssignedVars[] [2021-05-02 23:49:27,737 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:27,759 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:27,763 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:27,785 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:27,797 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:27,827 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:27,864 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_46 v_main_~c~0_143) (< v_main_~c~0_143 199999)) InVars {main_~c~0=v_main_~c~0_143, ~last~0=v_~last~0_46} OutVars{main_~c~0=v_main_~c~0_143, ~last~0=v_~last~0_46} AuxVars[] AssignedVars[] [2021-05-02 23:49:27,869 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:27,871 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:27,876 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:27,897 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:27,901 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:27,923 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:27,934 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:27,938 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_47 v_main_~c~0_145)) (< v_main_~c~0_145 200000)) InVars {main_~c~0=v_main_~c~0_145, ~last~0=v_~last~0_47} OutVars{main_~c~0=v_main_~c~0_145, ~last~0=v_~last~0_47} AuxVars[] AssignedVars[] [2021-05-02 23:49:27,941 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:27,943 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:27,949 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:27,974 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:27,984 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:28,018 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:28,049 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_147 200000) (= v_~last~0_48 v_main_~c~0_147)) InVars {main_~c~0=v_main_~c~0_147, ~last~0=v_~last~0_48} OutVars{main_~c~0=v_main_~c~0_147, ~last~0=v_~last~0_48} AuxVars[] AssignedVars[] [2021-05-02 23:49:28,062 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:28,090 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:28,096 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:28,112 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:28,116 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:28,119 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:28,130 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:28,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:28,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:28,493 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:28,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931215169] [2021-05-02 23:49:28,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1931215169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:28,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:28,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:49:28,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786185120] [2021-05-02 23:49:28,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:49:28,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:49:28,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:49:28,495 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:28,820 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2021-05-02 23:49:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:49:28,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 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 35 [2021-05-02 23:49:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:28,822 INFO L225 Difference]: With dead ends: 129 [2021-05-02 23:49:28,822 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 23:49:28,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:49:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 23:49:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2021-05-02 23:49:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 80 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2021-05-02 23:49:28,840 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 35 [2021-05-02 23:49:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:28,840 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2021-05-02 23:49:28,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2021-05-02 23:49:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:49:28,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:28,841 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:28,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:49:28,842 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:28,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:28,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1110430842, now seen corresponding path program 1 times [2021-05-02 23:49:28,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:28,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922036024] [2021-05-02 23:49:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:28,851 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_158 199999) (not (= v_~last~0_49 v_main_~c~0_158))) InVars {main_~c~0=v_main_~c~0_158, ~last~0=v_~last~0_49} OutVars{main_~c~0=v_main_~c~0_158, ~last~0=v_~last~0_49} AuxVars[] AssignedVars[] [2021-05-02 23:49:28,854 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:28,874 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:28,879 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:28,897 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:28,907 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:28,937 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:28,966 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_50 v_main_~c~0_160) (< v_main_~c~0_160 199999)) InVars {main_~c~0=v_main_~c~0_160, ~last~0=v_~last~0_50} OutVars{main_~c~0=v_main_~c~0_160, ~last~0=v_~last~0_50} AuxVars[] AssignedVars[] [2021-05-02 23:49:28,969 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:28,992 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:28,996 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:29,016 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:29,020 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:29,023 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:29,033 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:29,036 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_162 200000) (not (= v_~last~0_51 v_main_~c~0_162))) InVars {main_~c~0=v_main_~c~0_162, ~last~0=v_~last~0_51} OutVars{main_~c~0=v_main_~c~0_162, ~last~0=v_~last~0_51} AuxVars[] AssignedVars[] [2021-05-02 23:49:29,040 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:29,042 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:29,046 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:29,063 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:29,071 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:29,110 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:29,174 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_52 v_main_~c~0_164) (< v_main_~c~0_164 200000)) InVars {main_~c~0=v_main_~c~0_164, ~last~0=v_~last~0_52} OutVars{main_~c~0=v_main_~c~0_164, ~last~0=v_~last~0_52} AuxVars[] AssignedVars[] [2021-05-02 23:49:29,178 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:29,206 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:29,215 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:29,238 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:29,242 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:29,245 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:29,256 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:29,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:29,890 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922036024] [2021-05-02 23:49:29,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1922036024] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:29,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:29,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:49:29,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110610401] [2021-05-02 23:49:29,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:49:29,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:29,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:49:29,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:49:29,893 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:30,240 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2021-05-02 23:49:30,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:49:30,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 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 35 [2021-05-02 23:49:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:30,244 INFO L225 Difference]: With dead ends: 173 [2021-05-02 23:49:30,244 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 23:49:30,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 511.8ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:49:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 23:49:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-05-02 23:49:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 97 states have internal predecessors, (109), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2021-05-02 23:49:30,265 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 35 [2021-05-02 23:49:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:30,266 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2021-05-02 23:49:30,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2021-05-02 23:49:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 23:49:30,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:30,267 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:30,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:49:30,267 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:30,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1244444348, now seen corresponding path program 7 times [2021-05-02 23:49:30,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:30,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446452383] [2021-05-02 23:49:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:30,275 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_175 199999) (not (= v_~last~0_53 v_main_~c~0_175))) InVars {main_~c~0=v_main_~c~0_175, ~last~0=v_~last~0_53} OutVars{main_~c~0=v_main_~c~0_175, ~last~0=v_~last~0_53} AuxVars[] AssignedVars[] [2021-05-02 23:49:30,277 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:30,295 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:30,298 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:30,317 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:30,327 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:30,354 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:30,376 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:30,379 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_54 v_main_~c~0_177)) (< v_main_~c~0_177 200000)) InVars {main_~c~0=v_main_~c~0_177, ~last~0=v_~last~0_54} OutVars{main_~c~0=v_main_~c~0_177, ~last~0=v_~last~0_54} AuxVars[] AssignedVars[] [2021-05-02 23:49:30,382 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:30,400 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:30,407 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:30,420 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:30,427 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:30,445 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:30,470 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:30,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:30,589 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 23:49:31,249 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:31,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446452383] [2021-05-02 23:49:31,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [446452383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:31,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:31,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:49:31,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808834722] [2021-05-02 23:49:31,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:49:31,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:31,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:49:31,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:49:31,251 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:32,017 INFO L93 Difference]: Finished difference Result 182 states and 207 transitions. [2021-05-02 23:49:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:49:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (3), 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 35 [2021-05-02 23:49:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:32,019 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:49:32,020 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 23:49:32,021 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 920.7ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:49:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 23:49:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2021-05-02 23:49:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 100 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2021-05-02 23:49:32,038 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 35 [2021-05-02 23:49:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:32,038 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2021-05-02 23:49:32,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2021-05-02 23:49:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:49:32,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:32,039 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:32,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:49:32,039 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 8934055, now seen corresponding path program 7 times [2021-05-02 23:49:32,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:32,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265464982] [2021-05-02 23:49:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:32,048 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_55 v_main_~c~0_187)) (< v_main_~c~0_187 199999)) InVars {main_~c~0=v_main_~c~0_187, ~last~0=v_~last~0_55} OutVars{main_~c~0=v_main_~c~0_187, ~last~0=v_~last~0_55} AuxVars[] AssignedVars[] [2021-05-02 23:49:32,051 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:32,071 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:32,075 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:32,091 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:32,100 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:32,120 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:32,155 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_189 199999) (= v_~last~0_56 v_main_~c~0_189)) InVars {main_~c~0=v_main_~c~0_189, ~last~0=v_~last~0_56} OutVars{main_~c~0=v_main_~c~0_189, ~last~0=v_~last~0_56} AuxVars[] AssignedVars[] [2021-05-02 23:49:32,160 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:32,180 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:32,183 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:32,199 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:32,202 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:32,206 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:32,215 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:32,257 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_57 v_main_~c~0_191)) (< v_main_~c~0_191 200000)) InVars {main_~c~0=v_main_~c~0_191, ~last~0=v_~last~0_57} OutVars{main_~c~0=v_main_~c~0_191, ~last~0=v_~last~0_57} AuxVars[] AssignedVars[] [2021-05-02 23:49:32,273 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:32,292 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:32,297 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:32,314 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:32,324 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:32,348 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:32,386 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_193 200000) (= v_~last~0_58 v_main_~c~0_193)) InVars {main_~c~0=v_main_~c~0_193, ~last~0=v_~last~0_58} OutVars{main_~c~0=v_main_~c~0_193, ~last~0=v_~last~0_58} AuxVars[] AssignedVars[] [2021-05-02 23:49:32,389 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:32,409 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:32,425 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:32,439 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:32,442 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:32,445 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:32,455 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:32,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:32,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:32,828 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:32,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265464982] [2021-05-02 23:49:32,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [265464982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:32,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:32,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:49:32,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483412913] [2021-05-02 23:49:32,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:49:32,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:32,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:49:32,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:49:32,830 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 23:49:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:33,249 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2021-05-02 23:49:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:49:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 23:49:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:33,252 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:49:33,252 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 23:49:33,253 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 303.2ms TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:49:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 23:49:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-05-02 23:49:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-05-02 23:49:33,276 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 38 [2021-05-02 23:49:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:33,277 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-05-02 23:49:33,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 23:49:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-05-02 23:49:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:49:33,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:33,295 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:33,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:49:33,295 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:33,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:33,296 INFO L82 PathProgramCache]: Analyzing trace with hash 222838117, now seen corresponding path program 2 times [2021-05-02 23:49:33,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:33,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829512381] [2021-05-02 23:49:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:33,311 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_205 199999) (not (= v_~last~0_59 v_main_~c~0_205))) InVars {main_~c~0=v_main_~c~0_205, ~last~0=v_~last~0_59} OutVars{main_~c~0=v_main_~c~0_205, ~last~0=v_~last~0_59} AuxVars[] AssignedVars[] [2021-05-02 23:49:33,315 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:33,335 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:33,338 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:33,355 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:33,365 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:33,388 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:33,467 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_207 199999) (= v_~last~0_60 v_main_~c~0_207)) InVars {main_~c~0=v_main_~c~0_207, ~last~0=v_~last~0_60} OutVars{main_~c~0=v_main_~c~0_207, ~last~0=v_~last~0_60} AuxVars[] AssignedVars[] [2021-05-02 23:49:33,477 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:33,500 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:33,503 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:33,540 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:33,544 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:33,547 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:33,558 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:33,560 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_61 v_main_~c~0_209)) (< v_main_~c~0_209 200000)) InVars {main_~c~0=v_main_~c~0_209, ~last~0=v_~last~0_61} OutVars{main_~c~0=v_main_~c~0_209, ~last~0=v_~last~0_61} AuxVars[] AssignedVars[] [2021-05-02 23:49:33,563 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:33,581 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:33,586 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:33,606 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:33,621 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:33,645 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:33,682 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_62 v_main_~c~0_211) (< v_main_~c~0_211 200000)) InVars {main_~c~0=v_main_~c~0_211, ~last~0=v_~last~0_62} OutVars{main_~c~0=v_main_~c~0_211, ~last~0=v_~last~0_62} AuxVars[] AssignedVars[] [2021-05-02 23:49:33,685 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:33,710 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:33,712 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:33,729 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:33,732 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:33,735 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:33,747 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:33,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:33,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:34,429 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:34,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829512381] [2021-05-02 23:49:34,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [829512381] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:34,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:34,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:49:34,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462195507] [2021-05-02 23:49:34,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:49:34,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:49:34,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:49:34,431 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 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 23:49:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:34,851 INFO L93 Difference]: Finished difference Result 202 states and 226 transitions. [2021-05-02 23:49:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:49:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 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 23:49:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:34,853 INFO L225 Difference]: With dead ends: 202 [2021-05-02 23:49:34,853 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 23:49:34,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 571.6ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:49:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 23:49:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2021-05-02 23:49:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-05-02 23:49:34,876 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 38 [2021-05-02 23:49:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:34,876 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-05-02 23:49:34,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 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 23:49:34,877 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-05-02 23:49:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:49:34,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:34,878 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:34,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:49:34,878 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash 88824611, now seen corresponding path program 8 times [2021-05-02 23:49:34,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:34,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703235823] [2021-05-02 23:49:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:34,887 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_223 199999) (not (= v_~last~0_63 v_main_~c~0_223))) InVars {main_~c~0=v_main_~c~0_223, ~last~0=v_~last~0_63} OutVars{main_~c~0=v_main_~c~0_223, ~last~0=v_~last~0_63} AuxVars[] AssignedVars[] [2021-05-02 23:49:34,890 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:34,910 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:34,913 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:34,930 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:34,940 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:34,963 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:34,990 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:34,999 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_225 200000) (not (= v_~last~0_64 v_main_~c~0_225))) InVars {main_~c~0=v_main_~c~0_225, ~last~0=v_~last~0_64} OutVars{main_~c~0=v_main_~c~0_225, ~last~0=v_~last~0_64} AuxVars[] AssignedVars[] [2021-05-02 23:49:35,002 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:35,022 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:35,027 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:35,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:35,057 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:35,085 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:35,112 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:35,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:36,068 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:36,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703235823] [2021-05-02 23:49:36,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703235823] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:36,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:36,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:49:36,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571436196] [2021-05-02 23:49:36,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:49:36,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:36,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:49:36,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:49:36,071 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 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 23:49:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:36,890 INFO L93 Difference]: Finished difference Result 195 states and 221 transitions. [2021-05-02 23:49:36,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:49:36,892 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 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 23:49:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:36,893 INFO L225 Difference]: With dead ends: 195 [2021-05-02 23:49:36,893 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 23:49:36,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1124.7ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:49:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 23:49:36,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-05-02 23:49:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 106 states have internal predecessors, (120), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2021-05-02 23:49:36,918 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 38 [2021-05-02 23:49:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:36,918 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2021-05-02 23:49:36,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 24 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 23:49:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2021-05-02 23:49:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:49:36,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:36,919 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:36,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:49:36,919 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:36,920 INFO L82 PathProgramCache]: Analyzing trace with hash -338042972, now seen corresponding path program 8 times [2021-05-02 23:49:36,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:36,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507916023] [2021-05-02 23:49:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:36,928 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_236 199999) (not (= v_~last~0_65 v_main_~c~0_236))) InVars {main_~c~0=v_main_~c~0_236, ~last~0=v_~last~0_65} OutVars{main_~c~0=v_main_~c~0_236, ~last~0=v_~last~0_65} AuxVars[] AssignedVars[] [2021-05-02 23:49:36,931 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:36,949 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:36,952 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:36,969 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:36,980 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:37,005 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:37,033 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_66 v_main_~c~0_238) (< v_main_~c~0_238 199999)) InVars {main_~c~0=v_main_~c~0_238, ~last~0=v_~last~0_66} OutVars{main_~c~0=v_main_~c~0_238, ~last~0=v_~last~0_66} AuxVars[] AssignedVars[] [2021-05-02 23:49:37,037 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:37,040 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:37,043 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:37,056 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:37,059 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:37,078 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:37,087 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:37,091 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_67 v_main_~c~0_240)) (< v_main_~c~0_240 200000)) InVars {main_~c~0=v_main_~c~0_240, ~last~0=v_~last~0_67} OutVars{main_~c~0=v_main_~c~0_240, ~last~0=v_~last~0_67} AuxVars[] AssignedVars[] [2021-05-02 23:49:37,093 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:37,110 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:37,112 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:37,128 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:37,137 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:37,158 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:37,184 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_68 v_main_~c~0_242) (< v_main_~c~0_242 200000)) InVars {main_~c~0=v_main_~c~0_242, ~last~0=v_~last~0_68} OutVars{main_~c~0=v_main_~c~0_242, ~last~0=v_~last~0_68} AuxVars[] AssignedVars[] [2021-05-02 23:49:37,187 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:37,210 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:37,212 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:37,223 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:37,226 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:37,229 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:37,238 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:37,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:37,295 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 23:49:37,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:37,710 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:37,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507916023] [2021-05-02 23:49:37,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [507916023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:37,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:37,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:49:37,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972777207] [2021-05-02 23:49:37,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:49:37,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:49:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:49:37,712 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:38,165 INFO L93 Difference]: Finished difference Result 167 states and 189 transitions. [2021-05-02 23:49:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:49:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (3), 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 41 [2021-05-02 23:49:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:38,166 INFO L225 Difference]: With dead ends: 167 [2021-05-02 23:49:38,167 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 23:49:38,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:49:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 23:49:38,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-05-02 23:49:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 109 states have internal predecessors, (123), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-05-02 23:49:38,188 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 41 [2021-05-02 23:49:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:38,188 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-05-02 23:49:38,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-05-02 23:49:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:49:38,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:38,190 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:38,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:49:38,190 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:38,191 INFO L82 PathProgramCache]: Analyzing trace with hash -219157722, now seen corresponding path program 3 times [2021-05-02 23:49:38,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:38,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001003362] [2021-05-02 23:49:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:38,199 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_69 v_main_~c~0_255)) (< v_main_~c~0_255 199999)) InVars {main_~c~0=v_main_~c~0_255, ~last~0=v_~last~0_69} OutVars{main_~c~0=v_main_~c~0_255, ~last~0=v_~last~0_69} AuxVars[] AssignedVars[] [2021-05-02 23:49:38,202 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:38,220 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:38,222 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:38,237 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:38,246 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:38,266 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:38,293 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_70 v_main_~c~0_257) (< v_main_~c~0_257 199999)) InVars {main_~c~0=v_main_~c~0_257, ~last~0=v_~last~0_70} OutVars{main_~c~0=v_main_~c~0_257, ~last~0=v_~last~0_70} AuxVars[] AssignedVars[] [2021-05-02 23:49:38,295 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:38,297 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:38,300 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:38,327 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:38,330 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:38,346 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:38,355 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:38,357 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_259 200000) (not (= v_~last~0_71 v_main_~c~0_259))) InVars {main_~c~0=v_main_~c~0_259, ~last~0=v_~last~0_71} OutVars{main_~c~0=v_main_~c~0_259, ~last~0=v_~last~0_71} AuxVars[] AssignedVars[] [2021-05-02 23:49:38,360 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:38,378 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:38,381 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:38,397 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:38,405 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:38,426 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:38,454 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_261 200000) (= v_~last~0_72 v_main_~c~0_261)) InVars {main_~c~0=v_main_~c~0_261, ~last~0=v_~last~0_72} OutVars{main_~c~0=v_main_~c~0_261, ~last~0=v_~last~0_72} AuxVars[] AssignedVars[] [2021-05-02 23:49:38,457 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:38,478 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:38,481 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:38,496 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:38,499 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:38,501 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:38,512 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:38,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:38,639 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 23:49:38,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:39,230 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:39,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001003362] [2021-05-02 23:49:39,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1001003362] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:39,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:39,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:49:39,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283469180] [2021-05-02 23:49:39,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:49:39,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:39,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:49:39,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:49:39,233 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:39,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:39,731 INFO L93 Difference]: Finished difference Result 215 states and 240 transitions. [2021-05-02 23:49:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:49:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 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 41 [2021-05-02 23:49:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:39,737 INFO L225 Difference]: With dead ends: 215 [2021-05-02 23:49:39,737 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 23:49:39,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 663.5ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:49:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 23:49:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 116. [2021-05-02 23:49:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 109 states have internal predecessors, (123), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-05-02 23:49:39,760 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 41 [2021-05-02 23:49:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:39,760 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-05-02 23:49:39,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-05-02 23:49:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 23:49:39,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:39,761 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:39,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:49:39,762 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash -353171228, now seen corresponding path program 9 times [2021-05-02 23:49:39,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:39,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191544480] [2021-05-02 23:49:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:39,769 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_73 v_main_~c~0_274)) (< v_main_~c~0_274 199999)) InVars {main_~c~0=v_main_~c~0_274, ~last~0=v_~last~0_73} OutVars{main_~c~0=v_main_~c~0_274, ~last~0=v_~last~0_73} AuxVars[] AssignedVars[] [2021-05-02 23:49:39,773 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:39,774 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:39,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:39,808 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:39,819 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:39,853 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:39,878 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:39,880 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_276 200000) (not (= v_~last~0_74 v_main_~c~0_276))) InVars {main_~c~0=v_main_~c~0_276, ~last~0=v_~last~0_74} OutVars{main_~c~0=v_main_~c~0_276, ~last~0=v_~last~0_74} AuxVars[] AssignedVars[] [2021-05-02 23:49:39,883 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:39,885 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:39,904 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:39,923 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:39,933 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:39,984 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:40,017 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:40,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:40,992 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:40,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191544480] [2021-05-02 23:49:40,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191544480] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:40,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:40,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:49:40,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646529791] [2021-05-02 23:49:40,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:49:40,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:40,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:49:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:49:40,995 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:41,914 INFO L93 Difference]: Finished difference Result 208 states and 235 transitions. [2021-05-02 23:49:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:49:41,916 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (3), 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 41 [2021-05-02 23:49:41,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:41,917 INFO L225 Difference]: With dead ends: 208 [2021-05-02 23:49:41,917 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 23:49:41,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1189.5ms TimeCoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:49:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 23:49:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 119. [2021-05-02 23:49:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 112 states have internal predecessors, (127), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:49:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2021-05-02 23:49:41,947 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 41 [2021-05-02 23:49:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:41,947 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2021-05-02 23:49:41,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2021-05-02 23:49:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:49:41,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:41,949 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:41,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:49:41,949 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:41,950 INFO L82 PathProgramCache]: Analyzing trace with hash -722093495, now seen corresponding path program 1 times [2021-05-02 23:49:41,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:41,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612172541] [2021-05-02 23:49:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:41,966 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:49:41,968 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:41,987 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-02 23:49:41,998 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:42,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:42,246 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:42,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612172541] [2021-05-02 23:49:42,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1612172541] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:42,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:42,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:49:42,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46103579] [2021-05-02 23:49:42,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:49:42,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:42,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:49:42,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:49:42,248 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:42,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:42,477 INFO L93 Difference]: Finished difference Result 190 states and 214 transitions. [2021-05-02 23:49:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:49:42,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-05-02 23:49:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:42,485 INFO L225 Difference]: With dead ends: 190 [2021-05-02 23:49:42,485 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 23:49:42,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:49:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 23:49:42,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 97. [2021-05-02 23:49:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 91 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2021-05-02 23:49:42,523 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 44 [2021-05-02 23:49:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:42,523 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2021-05-02 23:49:42,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2021-05-02 23:49:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:49:42,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:42,525 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:42,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:49:42,525 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:42,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:42,527 INFO L82 PathProgramCache]: Analyzing trace with hash 855627143, now seen corresponding path program 9 times [2021-05-02 23:49:42,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:42,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405323336] [2021-05-02 23:49:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:42,551 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_76 v_main_~c~0_304)) (< v_main_~c~0_304 199999)) InVars {main_~c~0=v_main_~c~0_304, ~last~0=v_~last~0_76} OutVars{main_~c~0=v_main_~c~0_304, ~last~0=v_~last~0_76} AuxVars[] AssignedVars[] [2021-05-02 23:49:42,557 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:42,576 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:42,580 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:42,598 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:42,608 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:42,633 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:42,665 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_306 199999) (= v_~last~0_77 v_main_~c~0_306)) InVars {main_~c~0=v_main_~c~0_306, ~last~0=v_~last~0_77} OutVars{main_~c~0=v_main_~c~0_306, ~last~0=v_~last~0_77} AuxVars[] AssignedVars[] [2021-05-02 23:49:42,668 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:42,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:42,673 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:42,699 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:42,703 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:42,726 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:42,742 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:42,745 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_308 200000) (not (= v_~last~0_78 v_main_~c~0_308))) InVars {main_~c~0=v_main_~c~0_308, ~last~0=v_~last~0_78} OutVars{main_~c~0=v_main_~c~0_308, ~last~0=v_~last~0_78} AuxVars[] AssignedVars[] [2021-05-02 23:49:42,748 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:42,766 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:42,770 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:42,789 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:42,798 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:42,820 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:42,853 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_79 v_main_~c~0_310) (< v_main_~c~0_310 200000)) InVars {main_~c~0=v_main_~c~0_310, ~last~0=v_~last~0_79} OutVars{main_~c~0=v_main_~c~0_310, ~last~0=v_~last~0_79} AuxVars[] AssignedVars[] [2021-05-02 23:49:42,856 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:42,858 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:42,861 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:42,876 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:42,878 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:42,894 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:42,904 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:42,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:42,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:43,462 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:43,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405323336] [2021-05-02 23:49:43,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405323336] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:43,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:43,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:49:43,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371025996] [2021-05-02 23:49:43,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:49:43,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:43,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:49:43,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:49:43,464 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 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 23:49:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:43,939 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2021-05-02 23:49:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:49:43,940 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 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 23:49:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:43,941 INFO L225 Difference]: With dead ends: 173 [2021-05-02 23:49:43,941 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 23:49:43,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:49:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 23:49:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-05-02 23:49:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 94 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2021-05-02 23:49:43,970 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 44 [2021-05-02 23:49:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:43,970 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2021-05-02 23:49:43,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 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 23:49:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2021-05-02 23:49:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:49:43,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:43,972 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:43,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:49:43,972 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash 652532165, now seen corresponding path program 4 times [2021-05-02 23:49:43,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:43,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548478261] [2021-05-02 23:49:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:43,985 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_80 v_main_~c~0_324)) (< v_main_~c~0_324 199999)) InVars {main_~c~0=v_main_~c~0_324, ~last~0=v_~last~0_80} OutVars{main_~c~0=v_main_~c~0_324, ~last~0=v_~last~0_80} AuxVars[] AssignedVars[] [2021-05-02 23:49:43,988 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:43,990 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:43,994 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:44,015 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:44,027 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:44,073 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:44,105 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_326 199999) (= v_~last~0_81 v_main_~c~0_326)) InVars {main_~c~0=v_main_~c~0_326, ~last~0=v_~last~0_81} OutVars{main_~c~0=v_main_~c~0_326, ~last~0=v_~last~0_81} AuxVars[] AssignedVars[] [2021-05-02 23:49:44,109 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:44,111 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:44,114 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:44,131 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:44,134 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:44,152 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:44,163 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:44,166 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_328 200000) (not (= v_~last~0_82 v_main_~c~0_328))) InVars {main_~c~0=v_main_~c~0_328, ~last~0=v_~last~0_82} OutVars{main_~c~0=v_main_~c~0_328, ~last~0=v_~last~0_82} AuxVars[] AssignedVars[] [2021-05-02 23:49:44,169 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:44,189 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:44,192 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:44,209 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:44,219 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:44,243 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:44,278 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_83 v_main_~c~0_330) (< v_main_~c~0_330 200000)) InVars {main_~c~0=v_main_~c~0_330, ~last~0=v_~last~0_83} OutVars{main_~c~0=v_main_~c~0_330, ~last~0=v_~last~0_83} AuxVars[] AssignedVars[] [2021-05-02 23:49:44,282 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:44,284 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:44,287 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:44,307 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:44,310 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:44,327 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:44,338 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:44,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:44,486 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 23:49:44,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:45,337 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:45,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548478261] [2021-05-02 23:49:45,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [548478261] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:45,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:45,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:49:45,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134847399] [2021-05-02 23:49:45,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:49:45,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:45,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:49:45,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:49:45,340 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 23 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 23:49:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:46,083 INFO L93 Difference]: Finished difference Result 245 states and 272 transitions. [2021-05-02 23:49:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:49:46,084 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 23 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 23:49:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:46,086 INFO L225 Difference]: With dead ends: 245 [2021-05-02 23:49:46,086 INFO L226 Difference]: Without dead ends: 178 [2021-05-02 23:49:46,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 951.2ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:49:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-02 23:49:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 100. [2021-05-02 23:49:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 94 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2021-05-02 23:49:46,121 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 44 [2021-05-02 23:49:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:46,121 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2021-05-02 23:49:46,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 23 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 23:49:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2021-05-02 23:49:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:49:46,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:46,123 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:46,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:49:46,123 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash 518518659, now seen corresponding path program 10 times [2021-05-02 23:49:46,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:46,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443436178] [2021-05-02 23:49:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:46,131 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_344 199999) (not (= v_~last~0_84 v_main_~c~0_344))) InVars {main_~c~0=v_main_~c~0_344, ~last~0=v_~last~0_84} OutVars{main_~c~0=v_main_~c~0_344, ~last~0=v_~last~0_84} AuxVars[] AssignedVars[] [2021-05-02 23:49:46,134 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:46,136 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:46,140 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:46,160 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:46,171 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:46,216 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:46,245 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:46,253 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_346 200000) (not (= v_~last~0_85 v_main_~c~0_346))) InVars {main_~c~0=v_main_~c~0_346, ~last~0=v_~last~0_85} OutVars{main_~c~0=v_main_~c~0_346, ~last~0=v_~last~0_85} AuxVars[] AssignedVars[] [2021-05-02 23:49:46,256 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:46,259 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:46,263 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:46,284 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:46,295 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:46,335 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:46,373 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:46,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:47,574 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:47,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443436178] [2021-05-02 23:49:47,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1443436178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:47,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:47,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:49:47,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246318174] [2021-05-02 23:49:47,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:49:47,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:47,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:49:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:49:47,577 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 28 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 23:49:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:48,681 INFO L93 Difference]: Finished difference Result 238 states and 267 transitions. [2021-05-02 23:49:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:49:48,682 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 28 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 23:49:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:48,683 INFO L225 Difference]: With dead ends: 238 [2021-05-02 23:49:48,683 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 23:49:48,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1470.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:49:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 23:49:48,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-05-02 23:49:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2021-05-02 23:49:48,714 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 44 [2021-05-02 23:49:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:48,715 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2021-05-02 23:49:48,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 28 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 23:49:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2021-05-02 23:49:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:49:48,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:48,716 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:48,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:49:48,716 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:48,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:48,717 INFO L82 PathProgramCache]: Analyzing trace with hash -847187772, now seen corresponding path program 10 times [2021-05-02 23:49:48,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:48,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13751560] [2021-05-02 23:49:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:48,739 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_86 v_main_~c~0_359)) (< v_main_~c~0_359 199999)) InVars {main_~c~0=v_main_~c~0_359, ~last~0=v_~last~0_86} OutVars{main_~c~0=v_main_~c~0_359, ~last~0=v_~last~0_86} AuxVars[] AssignedVars[] [2021-05-02 23:49:48,742 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:48,765 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:48,771 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:48,792 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:48,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:48,831 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:48,864 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_361 199999) (= v_~last~0_87 v_main_~c~0_361)) InVars {main_~c~0=v_main_~c~0_361, ~last~0=v_~last~0_87} OutVars{main_~c~0=v_main_~c~0_361, ~last~0=v_~last~0_87} AuxVars[] AssignedVars[] [2021-05-02 23:49:48,867 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:48,868 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:48,873 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:48,889 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:48,893 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:48,927 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:48,942 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:48,944 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_363 200000) (not (= v_~last~0_88 v_main_~c~0_363))) InVars {main_~c~0=v_main_~c~0_363, ~last~0=v_~last~0_88} OutVars{main_~c~0=v_main_~c~0_363, ~last~0=v_~last~0_88} AuxVars[] AssignedVars[] [2021-05-02 23:49:48,947 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:48,963 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:48,966 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:48,982 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:48,991 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:49,013 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:49,052 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_365 200000) (= v_~last~0_89 v_main_~c~0_365)) InVars {main_~c~0=v_main_~c~0_365, ~last~0=v_~last~0_89} OutVars{main_~c~0=v_main_~c~0_365, ~last~0=v_~last~0_89} AuxVars[] AssignedVars[] [2021-05-02 23:49:49,056 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:49,082 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:49,087 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:49,112 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:49,115 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:49,118 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:49,130 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:49,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:49,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:49,834 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:49,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13751560] [2021-05-02 23:49:49,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [13751560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:49,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:49,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:49:49,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477537257] [2021-05-02 23:49:49,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:49:49,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:49:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:49:49,836 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:50,399 INFO L93 Difference]: Finished difference Result 182 states and 207 transitions. [2021-05-02 23:49:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:49:50,400 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 2 states have call successors, (3), 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 47 [2021-05-02 23:49:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:50,401 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:49:50,401 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 23:49:50,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:49:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 23:49:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2021-05-02 23:49:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2021-05-02 23:49:50,431 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 47 [2021-05-02 23:49:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:50,431 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2021-05-02 23:49:50,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2021-05-02 23:49:50,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:49:50,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:50,432 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:50,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:49:50,432 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:50,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1793684166, now seen corresponding path program 5 times [2021-05-02 23:49:50,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:50,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44289140] [2021-05-02 23:49:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:50,442 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_90 v_main_~c~0_380)) (< v_main_~c~0_380 199999)) InVars {main_~c~0=v_main_~c~0_380, ~last~0=v_~last~0_90} OutVars{main_~c~0=v_main_~c~0_380, ~last~0=v_~last~0_90} AuxVars[] AssignedVars[] [2021-05-02 23:49:50,444 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:50,460 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,463 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,497 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:50,510 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:50,539 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:50,579 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_382 199999) (= v_~last~0_91 v_main_~c~0_382)) InVars {main_~c~0=v_main_~c~0_382, ~last~0=v_~last~0_91} OutVars{main_~c~0=v_main_~c~0_382, ~last~0=v_~last~0_91} AuxVars[] AssignedVars[] [2021-05-02 23:49:50,584 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:50,587 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,593 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,609 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:50,613 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:50,629 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:50,639 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:50,642 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_384 200000) (not (= v_~last~0_92 v_main_~c~0_384))) InVars {main_~c~0=v_main_~c~0_384, ~last~0=v_~last~0_92} OutVars{main_~c~0=v_main_~c~0_384, ~last~0=v_~last~0_92} AuxVars[] AssignedVars[] [2021-05-02 23:49:50,645 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:50,669 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,672 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,693 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:50,704 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:50,726 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:50,755 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_386 200000) (= v_~last~0_93 v_main_~c~0_386)) InVars {main_~c~0=v_main_~c~0_386, ~last~0=v_~last~0_93} OutVars{main_~c~0=v_main_~c~0_386, ~last~0=v_~last~0_93} AuxVars[] AssignedVars[] [2021-05-02 23:49:50,758 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:50,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,781 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:50,800 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:50,802 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:50,805 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:50,815 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:50,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:50,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:51,873 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:51,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44289140] [2021-05-02 23:49:51,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [44289140] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:51,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:51,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:49:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022449987] [2021-05-02 23:49:51,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:49:51,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:49:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:49:51,875 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:52,633 INFO L93 Difference]: Finished difference Result 258 states and 286 transitions. [2021-05-02 23:49:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:49:52,635 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 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 47 [2021-05-02 23:49:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:52,636 INFO L225 Difference]: With dead ends: 258 [2021-05-02 23:49:52,636 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 23:49:52,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1038.9ms TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:49:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 23:49:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 106. [2021-05-02 23:49:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2021-05-02 23:49:52,662 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 47 [2021-05-02 23:49:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:52,662 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2021-05-02 23:49:52,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2021-05-02 23:49:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 23:49:52,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:52,663 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:52,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:49:52,663 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:52,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1659670660, now seen corresponding path program 11 times [2021-05-02 23:49:52,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:52,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104836450] [2021-05-02 23:49:52,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:52,675 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_401 199999) (not (= v_~last~0_94 v_main_~c~0_401))) InVars {main_~c~0=v_main_~c~0_401, ~last~0=v_~last~0_94} OutVars{main_~c~0=v_main_~c~0_401, ~last~0=v_~last~0_94} AuxVars[] AssignedVars[] [2021-05-02 23:49:52,678 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:52,680 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:52,684 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:52,704 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:52,714 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:52,763 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:52,796 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:52,799 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_95 v_main_~c~0_403)) (< v_main_~c~0_403 200000)) InVars {main_~c~0=v_main_~c~0_403, ~last~0=v_~last~0_95} OutVars{main_~c~0=v_main_~c~0_403, ~last~0=v_~last~0_95} AuxVars[] AssignedVars[] [2021-05-02 23:49:52,801 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:52,822 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:52,825 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:52,843 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:52,854 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:52,878 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:52,921 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:53,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:54,149 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:54,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104836450] [2021-05-02 23:49:54,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104836450] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:54,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:54,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:49:54,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774968254] [2021-05-02 23:49:54,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:49:54,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:54,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:49:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:49:54,152 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 32 states, 32 states have (on average 1.34375) internal successors, (43), 30 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:55,420 INFO L93 Difference]: Finished difference Result 251 states and 281 transitions. [2021-05-02 23:49:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:49:55,424 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 30 states have internal predecessors, (43), 2 states have call successors, (3), 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 47 [2021-05-02 23:49:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:55,425 INFO L225 Difference]: With dead ends: 251 [2021-05-02 23:49:55,426 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 23:49:55,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1601.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:49:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 23:49:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 109. [2021-05-02 23:49:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.174757281553398) internal successors, (121), 103 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2021-05-02 23:49:55,463 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 47 [2021-05-02 23:49:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:55,463 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2021-05-02 23:49:55,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 30 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2021-05-02 23:49:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:49:55,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:55,464 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:55,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:49:55,465 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:55,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1547587481, now seen corresponding path program 11 times [2021-05-02 23:49:55,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:55,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385556214] [2021-05-02 23:49:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:55,481 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_96 v_main_~c~0_417)) (< v_main_~c~0_417 199999)) InVars {main_~c~0=v_main_~c~0_417, ~last~0=v_~last~0_96} OutVars{main_~c~0=v_main_~c~0_417, ~last~0=v_~last~0_96} AuxVars[] AssignedVars[] [2021-05-02 23:49:55,484 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:55,503 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:55,507 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:55,529 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:55,545 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:55,566 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:55,604 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_419 199999) (= v_~last~0_97 v_main_~c~0_419)) InVars {main_~c~0=v_main_~c~0_419, ~last~0=v_~last~0_97} OutVars{main_~c~0=v_main_~c~0_419, ~last~0=v_~last~0_97} AuxVars[] AssignedVars[] [2021-05-02 23:49:55,606 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:55,627 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:55,629 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:55,643 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:55,646 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:55,649 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:55,658 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:55,663 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_421 200000) (not (= v_~last~0_98 v_main_~c~0_421))) InVars {main_~c~0=v_main_~c~0_421, ~last~0=v_~last~0_98} OutVars{main_~c~0=v_main_~c~0_421, ~last~0=v_~last~0_98} AuxVars[] AssignedVars[] [2021-05-02 23:49:55,675 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:55,690 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:55,700 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:55,719 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:55,727 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:55,748 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:55,777 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_99 v_main_~c~0_423) (< v_main_~c~0_423 200000)) InVars {main_~c~0=v_main_~c~0_423, ~last~0=v_~last~0_99} OutVars{main_~c~0=v_main_~c~0_423, ~last~0=v_~last~0_99} AuxVars[] AssignedVars[] [2021-05-02 23:49:55,791 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:55,793 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:55,797 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:55,813 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:55,816 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:55,834 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:55,844 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:55,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:55,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:56,506 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:56,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385556214] [2021-05-02 23:49:56,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [385556214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:56,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:56,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:49:56,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439190763] [2021-05-02 23:49:56,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:49:56,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:56,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:49:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:49:56,509 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 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 23:49:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:57,109 INFO L93 Difference]: Finished difference Result 191 states and 217 transitions. [2021-05-02 23:49:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:49:57,110 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 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 23:49:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:57,111 INFO L225 Difference]: With dead ends: 191 [2021-05-02 23:49:57,111 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 23:49:57,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 576.8ms TimeCoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:49:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 23:49:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-05-02 23:49:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.169811320754717) internal successors, (124), 106 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2021-05-02 23:49:57,143 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 50 [2021-05-02 23:49:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:57,143 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2021-05-02 23:49:57,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 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 23:49:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2021-05-02 23:49:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:49:57,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:57,144 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:57,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-02 23:49:57,145 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:57,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:57,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1108169179, now seen corresponding path program 6 times [2021-05-02 23:49:57,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:57,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334540592] [2021-05-02 23:49:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:57,156 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_100 v_main_~c~0_439)) (< v_main_~c~0_439 199999)) InVars {main_~c~0=v_main_~c~0_439, ~last~0=v_~last~0_100} OutVars{main_~c~0=v_main_~c~0_439, ~last~0=v_~last~0_100} AuxVars[] AssignedVars[] [2021-05-02 23:49:57,159 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:57,180 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:57,184 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:57,200 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:57,210 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:57,233 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:57,264 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_441 199999) (= v_~last~0_101 v_main_~c~0_441)) InVars {main_~c~0=v_main_~c~0_441, ~last~0=v_~last~0_101} OutVars{main_~c~0=v_main_~c~0_441, ~last~0=v_~last~0_101} AuxVars[] AssignedVars[] [2021-05-02 23:49:57,266 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:57,268 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:57,271 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:57,285 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:57,288 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:57,305 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:57,316 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:57,319 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_102 v_main_~c~0_443)) (< v_main_~c~0_443 200000)) InVars {main_~c~0=v_main_~c~0_443, ~last~0=v_~last~0_102} OutVars{main_~c~0=v_main_~c~0_443, ~last~0=v_~last~0_102} AuxVars[] AssignedVars[] [2021-05-02 23:49:57,324 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:57,342 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:57,347 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:57,365 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:57,375 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:57,400 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:57,433 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_445 200000) (= v_~last~0_103 v_main_~c~0_445)) InVars {main_~c~0=v_main_~c~0_445, ~last~0=v_~last~0_103} OutVars{main_~c~0=v_main_~c~0_445, ~last~0=v_~last~0_103} AuxVars[] AssignedVars[] [2021-05-02 23:49:57,437 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:49:57,460 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:57,463 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:57,479 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:49:57,482 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:49:57,485 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:49:57,496 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:57,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:57,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:58,615 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:58,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334540592] [2021-05-02 23:49:58,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1334540592] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:58,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:58,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:49:58,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811948891] [2021-05-02 23:49:58,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:49:58,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:49:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:49:58,618 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 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 23:49:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:59,540 INFO L93 Difference]: Finished difference Result 271 states and 300 transitions. [2021-05-02 23:49:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:49:59,541 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 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 23:49:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:59,543 INFO L225 Difference]: With dead ends: 271 [2021-05-02 23:49:59,543 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 23:49:59,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1152.8ms TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:49:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 23:49:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 112. [2021-05-02 23:49:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.169811320754717) internal successors, (124), 106 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:49:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2021-05-02 23:49:59,603 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 50 [2021-05-02 23:49:59,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:59,603 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2021-05-02 23:49:59,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 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 23:49:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2021-05-02 23:49:59,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:49:59,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:59,605 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:59,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-02 23:49:59,605 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:59,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1242182685, now seen corresponding path program 12 times [2021-05-02 23:49:59,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:59,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042458534] [2021-05-02 23:49:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:59,615 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_461 199999) (not (= v_~last~0_104 v_main_~c~0_461))) InVars {main_~c~0=v_main_~c~0_461, ~last~0=v_~last~0_104} OutVars{main_~c~0=v_main_~c~0_461, ~last~0=v_~last~0_104} AuxVars[] AssignedVars[] [2021-05-02 23:49:59,622 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:59,624 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:59,627 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:59,646 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:59,662 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:59,711 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:59,739 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:59,741 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_105 v_main_~c~0_463)) (< v_main_~c~0_463 200000)) InVars {main_~c~0=v_main_~c~0_463, ~last~0=v_~last~0_105} OutVars{main_~c~0=v_main_~c~0_463, ~last~0=v_~last~0_105} AuxVars[] AssignedVars[] [2021-05-02 23:49:59,742 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:49:59,743 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:59,747 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:59,760 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:49:59,768 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:49:59,795 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:49:59,818 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:49:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:59,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:00,901 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:00,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042458534] [2021-05-02 23:50:00,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042458534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:00,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:00,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:50:00,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489570540] [2021-05-02 23:50:00,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:50:00,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:00,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:50:00,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:50:00,903 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 32 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 23:50:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:02,016 INFO L93 Difference]: Finished difference Result 264 states and 295 transitions. [2021-05-02 23:50:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:50:02,017 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 32 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 23:50:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:02,018 INFO L225 Difference]: With dead ends: 264 [2021-05-02 23:50:02,018 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 23:50:02,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1398.9ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:50:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 23:50:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 115. [2021-05-02 23:50:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 109 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:50:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2021-05-02 23:50:02,052 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 50 [2021-05-02 23:50:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:02,052 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2021-05-02 23:50:02,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 32 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 23:50:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2021-05-02 23:50:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:50:02,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:02,053 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:02,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-02 23:50:02,054 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2090772964, now seen corresponding path program 12 times [2021-05-02 23:50:02,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:02,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674929875] [2021-05-02 23:50:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:02,061 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_478 199999) (not (= v_~last~0_106 v_main_~c~0_478))) InVars {main_~c~0=v_main_~c~0_478, ~last~0=v_~last~0_106} OutVars{main_~c~0=v_main_~c~0_478, ~last~0=v_~last~0_106} AuxVars[] AssignedVars[] [2021-05-02 23:50:02,064 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:02,078 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,081 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,095 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:02,102 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:02,120 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:02,150 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_480 199999) (= v_~last~0_107 v_main_~c~0_480)) InVars {main_~c~0=v_main_~c~0_480, ~last~0=v_~last~0_107} OutVars{main_~c~0=v_main_~c~0_480, ~last~0=v_~last~0_107} AuxVars[] AssignedVars[] [2021-05-02 23:50:02,152 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:02,175 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,177 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,194 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:02,198 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:02,201 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:02,212 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:02,215 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_482 200000) (not (= v_~last~0_108 v_main_~c~0_482))) InVars {main_~c~0=v_main_~c~0_482, ~last~0=v_~last~0_108} OutVars{main_~c~0=v_main_~c~0_482, ~last~0=v_~last~0_108} AuxVars[] AssignedVars[] [2021-05-02 23:50:02,217 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:02,218 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,222 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,240 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:02,249 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:02,288 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:02,321 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_109 v_main_~c~0_484) (< v_main_~c~0_484 200000)) InVars {main_~c~0=v_main_~c~0_484, ~last~0=v_~last~0_109} OutVars{main_~c~0=v_main_~c~0_484, ~last~0=v_~last~0_109} AuxVars[] AssignedVars[] [2021-05-02 23:50:02,323 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:02,326 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,336 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:02,351 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:02,354 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:02,373 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:02,383 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:02,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:02,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:03,533 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:03,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674929875] [2021-05-02 23:50:03,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674929875] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:03,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:03,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:50:03,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107953686] [2021-05-02 23:50:03,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:50:03,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:50:03,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:50:03,535 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:04,289 INFO L93 Difference]: Finished difference Result 298 states and 330 transitions. [2021-05-02 23:50:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:50:04,290 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 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 53 [2021-05-02 23:50:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:04,291 INFO L225 Difference]: With dead ends: 298 [2021-05-02 23:50:04,291 INFO L226 Difference]: Without dead ends: 225 [2021-05-02 23:50:04,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1136.5ms TimeCoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:50:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-02 23:50:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 160. [2021-05-02 23:50:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 152 states have (on average 1.131578947368421) internal successors, (172), 153 states have internal predecessors, (172), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 179 transitions. [2021-05-02 23:50:04,333 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 179 transitions. Word has length 53 [2021-05-02 23:50:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:04,333 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 179 transitions. [2021-05-02 23:50:04,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:04,334 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 179 transitions. [2021-05-02 23:50:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:50:04,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:04,334 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:04,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-02 23:50:04,334 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:04,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1119436186, now seen corresponding path program 7 times [2021-05-02 23:50:04,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:04,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242075253] [2021-05-02 23:50:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:04,341 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_110 v_main_~c~0_501)) (< v_main_~c~0_501 199999)) InVars {main_~c~0=v_main_~c~0_501, ~last~0=v_~last~0_110} OutVars{main_~c~0=v_main_~c~0_501, ~last~0=v_~last~0_110} AuxVars[] AssignedVars[] [2021-05-02 23:50:04,343 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:04,344 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:04,349 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:04,361 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:04,368 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:04,395 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:04,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_503 199999) (= v_~last~0_111 v_main_~c~0_503)) InVars {main_~c~0=v_main_~c~0_503, ~last~0=v_~last~0_111} OutVars{main_~c~0=v_main_~c~0_503, ~last~0=v_~last~0_111} AuxVars[] AssignedVars[] [2021-05-02 23:50:04,421 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:04,439 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:04,441 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:04,453 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:04,456 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:04,458 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:04,467 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:04,469 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_505 200000) (not (= v_~last~0_112 v_main_~c~0_505))) InVars {main_~c~0=v_main_~c~0_505, ~last~0=v_~last~0_112} OutVars{main_~c~0=v_main_~c~0_505, ~last~0=v_~last~0_112} AuxVars[] AssignedVars[] [2021-05-02 23:50:04,471 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:04,483 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:04,485 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:04,499 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:04,506 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:04,524 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:04,556 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_113 v_main_~c~0_507) (< v_main_~c~0_507 200000)) InVars {main_~c~0=v_main_~c~0_507, ~last~0=v_~last~0_113} OutVars{main_~c~0=v_main_~c~0_507, ~last~0=v_~last~0_113} AuxVars[] AssignedVars[] [2021-05-02 23:50:04,569 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:04,588 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:04,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:04,606 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:04,608 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:04,611 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:04,621 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:04,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:04,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:05,685 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242075253] [2021-05-02 23:50:05,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242075253] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:05,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:05,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:50:05,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993924689] [2021-05-02 23:50:05,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:50:05,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:05,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:50:05,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:50:05,687 INFO L87 Difference]: Start difference. First operand 160 states and 179 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:06,812 INFO L93 Difference]: Finished difference Result 319 states and 350 transitions. [2021-05-02 23:50:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:50:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 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 53 [2021-05-02 23:50:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:06,815 INFO L225 Difference]: With dead ends: 319 [2021-05-02 23:50:06,815 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 23:50:06,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1195.4ms TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:50:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 23:50:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 160. [2021-05-02 23:50:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 152 states have (on average 1.131578947368421) internal successors, (172), 153 states have internal predecessors, (172), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 179 transitions. [2021-05-02 23:50:06,866 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 179 transitions. Word has length 53 [2021-05-02 23:50:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:06,866 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 179 transitions. [2021-05-02 23:50:06,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 179 transitions. [2021-05-02 23:50:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 23:50:06,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:06,867 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:06,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-02 23:50:06,867 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:06,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:06,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1253449692, now seen corresponding path program 13 times [2021-05-02 23:50:06,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:06,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177298546] [2021-05-02 23:50:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:06,873 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_114 v_main_~c~0_524)) (< v_main_~c~0_524 199999)) InVars {main_~c~0=v_main_~c~0_524, ~last~0=v_~last~0_114} OutVars{main_~c~0=v_main_~c~0_524, ~last~0=v_~last~0_114} AuxVars[] AssignedVars[] [2021-05-02 23:50:06,875 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:06,876 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:06,879 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:06,892 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:06,900 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:06,934 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:06,957 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:06,960 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_526 200000) (not (= v_~last~0_115 v_main_~c~0_526))) InVars {main_~c~0=v_main_~c~0_526, ~last~0=v_~last~0_115} OutVars{main_~c~0=v_main_~c~0_526, ~last~0=v_~last~0_115} AuxVars[] AssignedVars[] [2021-05-02 23:50:06,970 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:06,995 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:06,997 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:07,007 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:07,013 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:07,028 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:07,050 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:07,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:08,312 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:08,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177298546] [2021-05-02 23:50:08,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177298546] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:08,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:08,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:50:08,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999455146] [2021-05-02 23:50:08,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:50:08,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:08,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:50:08,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:50:08,314 INFO L87 Difference]: Start difference. First operand 160 states and 179 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:09,790 INFO L93 Difference]: Finished difference Result 312 states and 345 transitions. [2021-05-02 23:50:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:50:09,790 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 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 53 [2021-05-02 23:50:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:09,791 INFO L225 Difference]: With dead ends: 312 [2021-05-02 23:50:09,792 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 23:50:09,793 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1686.4ms TimeCoverageRelationStatistics Valid=247, Invalid=2405, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:50:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 23:50:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2021-05-02 23:50:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 155 states have (on average 1.135483870967742) internal successors, (176), 156 states have internal predecessors, (176), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2021-05-02 23:50:09,849 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 53 [2021-05-02 23:50:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:09,850 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2021-05-02 23:50:09,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2021-05-02 23:50:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:50:09,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:09,850 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:09,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-02 23:50:09,851 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash 397140807, now seen corresponding path program 13 times [2021-05-02 23:50:09,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:09,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518255231] [2021-05-02 23:50:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:09,859 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_542 199999) (not (= v_~last~0_116 v_main_~c~0_542))) InVars {main_~c~0=v_main_~c~0_542, ~last~0=v_~last~0_116} OutVars{main_~c~0=v_main_~c~0_542, ~last~0=v_~last~0_116} AuxVars[] AssignedVars[] [2021-05-02 23:50:09,860 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:09,861 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:09,865 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:09,877 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:09,884 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:09,913 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:09,938 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_117 v_main_~c~0_544) (< v_main_~c~0_544 199999)) InVars {main_~c~0=v_main_~c~0_544, ~last~0=v_~last~0_117} OutVars{main_~c~0=v_main_~c~0_544, ~last~0=v_~last~0_117} AuxVars[] AssignedVars[] [2021-05-02 23:50:09,941 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:09,943 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:09,946 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:09,959 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:09,962 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:09,979 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:09,988 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:09,991 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_546 200000) (not (= v_~last~0_118 v_main_~c~0_546))) InVars {main_~c~0=v_main_~c~0_546, ~last~0=v_~last~0_118} OutVars{main_~c~0=v_main_~c~0_546, ~last~0=v_~last~0_118} AuxVars[] AssignedVars[] [2021-05-02 23:50:09,993 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:09,995 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:09,997 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:10,013 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:10,020 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:10,049 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:10,073 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_119 v_main_~c~0_548) (< v_main_~c~0_548 200000)) InVars {main_~c~0=v_main_~c~0_548, ~last~0=v_~last~0_119} OutVars{main_~c~0=v_main_~c~0_548, ~last~0=v_~last~0_119} AuxVars[] AssignedVars[] [2021-05-02 23:50:10,075 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:10,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:10,094 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:10,107 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:10,109 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:10,111 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:10,120 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:10,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:10,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:10,874 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:10,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518255231] [2021-05-02 23:50:10,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [518255231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:10,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:10,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:50:10,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973136960] [2021-05-02 23:50:10,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:50:10,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:10,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:50:10,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:50:10,877 INFO L87 Difference]: Start difference. First operand 163 states and 183 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:50:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:11,576 INFO L93 Difference]: Finished difference Result 255 states and 287 transitions. [2021-05-02 23:50:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:50:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:50:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:11,578 INFO L225 Difference]: With dead ends: 255 [2021-05-02 23:50:11,578 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 23:50:11,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:50:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 23:50:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2021-05-02 23:50:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 161 states have (on average 1.1366459627329193) internal successors, (183), 162 states have internal predecessors, (183), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2021-05-02 23:50:11,637 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 56 [2021-05-02 23:50:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:11,637 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2021-05-02 23:50:11,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:50:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2021-05-02 23:50:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:50:11,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:11,638 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:11,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-02 23:50:11,639 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:11,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:11,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1500074817, now seen corresponding path program 8 times [2021-05-02 23:50:11,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:11,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76360113] [2021-05-02 23:50:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:11,649 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_120 v_main_~c~0_566)) (< v_main_~c~0_566 199999)) InVars {main_~c~0=v_main_~c~0_566, ~last~0=v_~last~0_120} OutVars{main_~c~0=v_main_~c~0_566, ~last~0=v_~last~0_120} AuxVars[] AssignedVars[] [2021-05-02 23:50:11,651 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:11,668 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,671 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,686 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:11,694 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:11,714 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:11,754 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_121 v_main_~c~0_568) (< v_main_~c~0_568 199999)) InVars {main_~c~0=v_main_~c~0_568, ~last~0=v_~last~0_121} OutVars{main_~c~0=v_main_~c~0_568, ~last~0=v_~last~0_121} AuxVars[] AssignedVars[] [2021-05-02 23:50:11,757 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:11,775 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,778 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:11,806 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:11,808 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:11,818 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:11,820 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_122 v_main_~c~0_570)) (< v_main_~c~0_570 200000)) InVars {main_~c~0=v_main_~c~0_570, ~last~0=v_~last~0_122} OutVars{main_~c~0=v_main_~c~0_570, ~last~0=v_~last~0_122} AuxVars[] AssignedVars[] [2021-05-02 23:50:11,821 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:11,835 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,840 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,865 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:11,877 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:11,904 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:11,943 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_572 200000) (= v_~last~0_123 v_main_~c~0_572)) InVars {main_~c~0=v_main_~c~0_572, ~last~0=v_~last~0_123} OutVars{main_~c~0=v_main_~c~0_572, ~last~0=v_~last~0_123} AuxVars[] AssignedVars[] [2021-05-02 23:50:11,948 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:11,974 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,978 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:11,995 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:11,999 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:12,002 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:12,015 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:12,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:12,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:12,868 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76360113] [2021-05-02 23:50:12,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [76360113] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:12,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:12,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:50:12,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932465188] [2021-05-02 23:50:12,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:50:12,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:50:12,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:50:12,870 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 24 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 23:50:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:13,559 INFO L93 Difference]: Finished difference Result 356 states and 391 transitions. [2021-05-02 23:50:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:50:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 24 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 23:50:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:13,561 INFO L225 Difference]: With dead ends: 356 [2021-05-02 23:50:13,561 INFO L226 Difference]: Without dead ends: 277 [2021-05-02 23:50:13,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 746.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:50:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-02 23:50:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 207. [2021-05-02 23:50:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 199 states have (on average 1.1105527638190955) internal successors, (221), 200 states have internal predecessors, (221), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 228 transitions. [2021-05-02 23:50:13,634 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 228 transitions. Word has length 56 [2021-05-02 23:50:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:13,634 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 228 transitions. [2021-05-02 23:50:13,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 24 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 23:50:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 228 transitions. [2021-05-02 23:50:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:50:13,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:13,635 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:13,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-05-02 23:50:13,636 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1767392635, now seen corresponding path program 9 times [2021-05-02 23:50:13,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:13,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530224926] [2021-05-02 23:50:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:13,645 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_590 199999) (not (= v_~last~0_124 v_main_~c~0_590))) InVars {main_~c~0=v_main_~c~0_590, ~last~0=v_~last~0_124} OutVars{main_~c~0=v_main_~c~0_590, ~last~0=v_~last~0_124} AuxVars[] AssignedVars[] [2021-05-02 23:50:13,648 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:13,649 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:13,651 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:13,665 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:13,672 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:13,710 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:13,739 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_125 v_main_~c~0_592) (< v_main_~c~0_592 199999)) InVars {main_~c~0=v_main_~c~0_592, ~last~0=v_~last~0_125} OutVars{main_~c~0=v_main_~c~0_592, ~last~0=v_~last~0_125} AuxVars[] AssignedVars[] [2021-05-02 23:50:13,741 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:13,762 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:13,765 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:13,781 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:13,784 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:13,787 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:13,798 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:13,801 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_594 200000) (not (= v_~last~0_126 v_main_~c~0_594))) InVars {main_~c~0=v_main_~c~0_594, ~last~0=v_~last~0_126} OutVars{main_~c~0=v_main_~c~0_594, ~last~0=v_~last~0_126} AuxVars[] AssignedVars[] [2021-05-02 23:50:13,803 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:13,821 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:13,824 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:13,842 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:13,851 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:13,873 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:13,904 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_596 200000) (= v_~last~0_127 v_main_~c~0_596)) InVars {main_~c~0=v_main_~c~0_596, ~last~0=v_~last~0_127} OutVars{main_~c~0=v_main_~c~0_596, ~last~0=v_~last~0_127} AuxVars[] AssignedVars[] [2021-05-02 23:50:13,907 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:13,909 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:13,914 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:13,931 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:13,935 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:13,953 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:13,966 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:14,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:14,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:15,186 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:15,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530224926] [2021-05-02 23:50:15,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [530224926] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:15,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:15,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:50:15,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579955877] [2021-05-02 23:50:15,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:50:15,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:15,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:50:15,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:50:15,188 INFO L87 Difference]: Start difference. First operand 207 states and 228 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 31 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 23:50:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:16,615 INFO L93 Difference]: Finished difference Result 378 states and 413 transitions. [2021-05-02 23:50:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:50:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 31 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 23:50:16,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:16,618 INFO L225 Difference]: With dead ends: 378 [2021-05-02 23:50:16,619 INFO L226 Difference]: Without dead ends: 299 [2021-05-02 23:50:16,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1422.8ms TimeCoverageRelationStatistics Valid=192, Invalid=1614, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:50:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-02 23:50:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 207. [2021-05-02 23:50:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 199 states have (on average 1.1105527638190955) internal successors, (221), 200 states have internal predecessors, (221), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 228 transitions. [2021-05-02 23:50:16,698 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 228 transitions. Word has length 56 [2021-05-02 23:50:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:16,699 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 228 transitions. [2021-05-02 23:50:16,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 31 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 23:50:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 228 transitions. [2021-05-02 23:50:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:50:16,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:16,700 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:16,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-05-02 23:50:16,701 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:16,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1901406141, now seen corresponding path program 14 times [2021-05-02 23:50:16,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:16,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141598047] [2021-05-02 23:50:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:16,708 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_128 v_main_~c~0_614)) (< v_main_~c~0_614 199999)) InVars {main_~c~0=v_main_~c~0_614, ~last~0=v_~last~0_128} OutVars{main_~c~0=v_main_~c~0_614, ~last~0=v_~last~0_128} AuxVars[] AssignedVars[] [2021-05-02 23:50:16,711 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:16,733 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:16,736 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:16,756 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:16,767 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:16,798 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:16,828 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:16,832 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_129 v_main_~c~0_616)) (< v_main_~c~0_616 200000)) InVars {main_~c~0=v_main_~c~0_616, ~last~0=v_~last~0_129} OutVars{main_~c~0=v_main_~c~0_616, ~last~0=v_~last~0_129} AuxVars[] AssignedVars[] [2021-05-02 23:50:16,836 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:16,838 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:16,841 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:16,865 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:16,874 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:16,914 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:16,945 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:17,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:18,702 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:18,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141598047] [2021-05-02 23:50:18,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [141598047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:18,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:18,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:50:18,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975260157] [2021-05-02 23:50:18,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:50:18,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:18,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:50:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:50:18,705 INFO L87 Difference]: Start difference. First operand 207 states and 228 transitions. Second operand has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 36 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 23:50:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:20,846 INFO L93 Difference]: Finished difference Result 371 states and 408 transitions. [2021-05-02 23:50:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:50:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 36 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 23:50:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:20,848 INFO L225 Difference]: With dead ends: 371 [2021-05-02 23:50:20,848 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 23:50:20,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2385.0ms TimeCoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:50:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 23:50:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 210. [2021-05-02 23:50:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 202 states have (on average 1.113861386138614) internal successors, (225), 203 states have internal predecessors, (225), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 232 transitions. [2021-05-02 23:50:20,910 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 232 transitions. Word has length 56 [2021-05-02 23:50:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:20,910 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 232 transitions. [2021-05-02 23:50:20,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 36 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 23:50:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 232 transitions. [2021-05-02 23:50:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:50:20,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:20,912 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:20,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-05-02 23:50:20,912 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1617622268, now seen corresponding path program 14 times [2021-05-02 23:50:20,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:20,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803030696] [2021-05-02 23:50:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:20,938 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_633 199999) (not (= v_~last~0_130 v_main_~c~0_633))) InVars {main_~c~0=v_main_~c~0_633, ~last~0=v_~last~0_130} OutVars{main_~c~0=v_main_~c~0_633, ~last~0=v_~last~0_130} AuxVars[] AssignedVars[] [2021-05-02 23:50:20,941 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:20,962 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:20,964 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:20,980 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:20,989 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:21,014 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:21,052 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_131 v_main_~c~0_635) (< v_main_~c~0_635 199999)) InVars {main_~c~0=v_main_~c~0_635, ~last~0=v_~last~0_131} OutVars{main_~c~0=v_main_~c~0_635, ~last~0=v_~last~0_131} AuxVars[] AssignedVars[] [2021-05-02 23:50:21,055 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:21,075 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,077 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,097 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:21,100 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:21,103 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:21,116 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:21,118 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_132 v_main_~c~0_637)) (< v_main_~c~0_637 200000)) InVars {main_~c~0=v_main_~c~0_637, ~last~0=v_~last~0_132} OutVars{main_~c~0=v_main_~c~0_637, ~last~0=v_~last~0_132} AuxVars[] AssignedVars[] [2021-05-02 23:50:21,121 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:21,125 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,129 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,149 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:21,159 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:21,199 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:21,234 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_639 200000) (= v_~last~0_133 v_main_~c~0_639)) InVars {main_~c~0=v_main_~c~0_639, ~last~0=v_~last~0_133} OutVars{main_~c~0=v_main_~c~0_639, ~last~0=v_~last~0_133} AuxVars[] AssignedVars[] [2021-05-02 23:50:21,237 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:21,239 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,243 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,263 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:21,267 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:21,288 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:21,317 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:21,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:21,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:23,124 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:23,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803030696] [2021-05-02 23:50:23,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [803030696] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:23,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:23,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:50:23,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227340457] [2021-05-02 23:50:23,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:50:23,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:23,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:50:23,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1556, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:50:23,127 INFO L87 Difference]: Start difference. First operand 210 states and 232 transitions. Second operand has 40 states, 40 states have (on average 1.375) internal successors, (55), 38 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:24,108 INFO L93 Difference]: Finished difference Result 373 states and 411 transitions. [2021-05-02 23:50:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:50:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 38 states have internal predecessors, (55), 2 states have call successors, (3), 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 59 [2021-05-02 23:50:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:24,110 INFO L225 Difference]: With dead ends: 373 [2021-05-02 23:50:24,110 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 23:50:24,111 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1801.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:50:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 23:50:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 216. [2021-05-02 23:50:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 208 states have (on average 1.1153846153846154) internal successors, (232), 209 states have internal predecessors, (232), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 239 transitions. [2021-05-02 23:50:24,168 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 239 transitions. Word has length 59 [2021-05-02 23:50:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:24,168 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 239 transitions. [2021-05-02 23:50:24,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 38 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 239 transitions. [2021-05-02 23:50:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:50:24,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:24,169 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:24,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2021-05-02 23:50:24,170 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash -187469118, now seen corresponding path program 10 times [2021-05-02 23:50:24,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:24,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612587676] [2021-05-02 23:50:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:24,178 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_134 v_main_~c~0_658)) (< v_main_~c~0_658 199999)) InVars {main_~c~0=v_main_~c~0_658, ~last~0=v_~last~0_134} OutVars{main_~c~0=v_main_~c~0_658, ~last~0=v_~last~0_134} AuxVars[] AssignedVars[] [2021-05-02 23:50:24,181 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:24,198 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:24,201 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:24,214 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:24,221 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:24,239 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:24,266 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_660 199999) (= v_~last~0_135 v_main_~c~0_660)) InVars {main_~c~0=v_main_~c~0_660, ~last~0=v_~last~0_135} OutVars{main_~c~0=v_main_~c~0_660, ~last~0=v_~last~0_135} AuxVars[] AssignedVars[] [2021-05-02 23:50:24,268 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:24,269 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:24,271 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:24,281 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:24,284 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:24,297 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:24,307 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:24,309 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_662 200000) (not (= v_~last~0_136 v_main_~c~0_662))) InVars {main_~c~0=v_main_~c~0_662, ~last~0=v_~last~0_136} OutVars{main_~c~0=v_main_~c~0_662, ~last~0=v_~last~0_136} AuxVars[] AssignedVars[] [2021-05-02 23:50:24,311 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:24,312 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:24,315 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:24,332 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:24,342 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:24,378 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:24,410 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_137 v_main_~c~0_664) (< v_main_~c~0_664 200000)) InVars {main_~c~0=v_main_~c~0_664, ~last~0=v_~last~0_137} OutVars{main_~c~0=v_main_~c~0_664, ~last~0=v_~last~0_137} AuxVars[] AssignedVars[] [2021-05-02 23:50:24,413 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:24,434 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:24,436 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:24,452 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:24,454 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:24,457 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:24,466 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:24,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:24,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:25,431 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:25,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612587676] [2021-05-02 23:50:25,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1612587676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:25,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:25,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:50:25,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778169892] [2021-05-02 23:50:25,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:50:25,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:50:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:50:25,433 INFO L87 Difference]: Start difference. First operand 216 states and 239 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:26,168 INFO L93 Difference]: Finished difference Result 403 states and 440 transitions. [2021-05-02 23:50:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:50:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 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 59 [2021-05-02 23:50:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:26,170 INFO L225 Difference]: With dead ends: 403 [2021-05-02 23:50:26,170 INFO L226 Difference]: Without dead ends: 324 [2021-05-02 23:50:26,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 891.2ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:50:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-02 23:50:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 216. [2021-05-02 23:50:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 208 states have (on average 1.1153846153846154) internal successors, (232), 209 states have internal predecessors, (232), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 239 transitions. [2021-05-02 23:50:26,225 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 239 transitions. Word has length 59 [2021-05-02 23:50:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:26,225 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 239 transitions. [2021-05-02 23:50:26,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 239 transitions. [2021-05-02 23:50:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:50:26,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:26,226 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:26,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2021-05-02 23:50:26,226 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash 840030726, now seen corresponding path program 11 times [2021-05-02 23:50:26,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:26,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625337472] [2021-05-02 23:50:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:26,236 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_683 199999) (not (= v_~last~0_138 v_main_~c~0_683))) InVars {main_~c~0=v_main_~c~0_683, ~last~0=v_~last~0_138} OutVars{main_~c~0=v_main_~c~0_683, ~last~0=v_~last~0_138} AuxVars[] AssignedVars[] [2021-05-02 23:50:26,238 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:26,250 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:26,252 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:26,264 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:26,271 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:26,287 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:26,312 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_139 v_main_~c~0_685) (< v_main_~c~0_685 199999)) InVars {main_~c~0=v_main_~c~0_685, ~last~0=v_~last~0_139} OutVars{main_~c~0=v_main_~c~0_685, ~last~0=v_~last~0_139} AuxVars[] AssignedVars[] [2021-05-02 23:50:26,314 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:26,330 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:26,332 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:26,343 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:26,345 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:26,347 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:26,356 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:26,359 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_140 v_main_~c~0_687)) (< v_main_~c~0_687 200000)) InVars {main_~c~0=v_main_~c~0_687, ~last~0=v_~last~0_140} OutVars{main_~c~0=v_main_~c~0_687, ~last~0=v_~last~0_140} AuxVars[] AssignedVars[] [2021-05-02 23:50:26,361 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:26,363 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:26,365 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:26,379 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:26,387 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:26,415 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:26,439 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_689 200000) (= v_~last~0_141 v_main_~c~0_689)) InVars {main_~c~0=v_main_~c~0_689, ~last~0=v_~last~0_141} OutVars{main_~c~0=v_main_~c~0_689, ~last~0=v_~last~0_141} AuxVars[] AssignedVars[] [2021-05-02 23:50:26,441 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:26,443 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:26,445 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:26,457 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:26,460 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:26,473 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:26,482 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:26,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:26,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:27,645 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:27,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625337472] [2021-05-02 23:50:27,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [625337472] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:27,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:27,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:50:27,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297731038] [2021-05-02 23:50:27,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:50:27,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:27,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:50:27,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:50:27,647 INFO L87 Difference]: Start difference. First operand 216 states and 239 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 33 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:28,855 INFO L93 Difference]: Finished difference Result 388 states and 425 transitions. [2021-05-02 23:50:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:50:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 33 states have internal predecessors, (55), 2 states have call successors, (3), 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 59 [2021-05-02 23:50:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:28,857 INFO L225 Difference]: With dead ends: 388 [2021-05-02 23:50:28,857 INFO L226 Difference]: Without dead ends: 309 [2021-05-02 23:50:28,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1365.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1863, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:50:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-02 23:50:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 216. [2021-05-02 23:50:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 208 states have (on average 1.1153846153846154) internal successors, (232), 209 states have internal predecessors, (232), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 239 transitions. [2021-05-02 23:50:28,916 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 239 transitions. Word has length 59 [2021-05-02 23:50:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:28,916 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 239 transitions. [2021-05-02 23:50:28,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 33 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 239 transitions. [2021-05-02 23:50:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 23:50:28,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:28,917 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:28,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-05-02 23:50:28,918 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:28,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:28,918 INFO L82 PathProgramCache]: Analyzing trace with hash 706017220, now seen corresponding path program 15 times [2021-05-02 23:50:28,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:28,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752103783] [2021-05-02 23:50:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:28,926 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_708 199999) (not (= v_~last~0_142 v_main_~c~0_708))) InVars {main_~c~0=v_main_~c~0_708, ~last~0=v_~last~0_142} OutVars{main_~c~0=v_main_~c~0_708, ~last~0=v_~last~0_142} AuxVars[] AssignedVars[] [2021-05-02 23:50:28,929 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:28,931 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:28,933 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:28,950 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:28,959 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:28,991 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:29,017 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:29,019 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_143 v_main_~c~0_710)) (< v_main_~c~0_710 200000)) InVars {main_~c~0=v_main_~c~0_710, ~last~0=v_~last~0_143} OutVars{main_~c~0=v_main_~c~0_710, ~last~0=v_~last~0_143} AuxVars[] AssignedVars[] [2021-05-02 23:50:29,021 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:29,035 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:29,038 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:29,052 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:29,059 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:29,077 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:29,119 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:29,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:30,768 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:30,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752103783] [2021-05-02 23:50:30,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [752103783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:30,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:30,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:50:30,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850580664] [2021-05-02 23:50:30,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:50:30,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:30,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:50:30,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:50:30,770 INFO L87 Difference]: Start difference. First operand 216 states and 239 transitions. Second operand has 40 states, 40 states have (on average 1.375) internal successors, (55), 38 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:32,738 INFO L93 Difference]: Finished difference Result 381 states and 420 transitions. [2021-05-02 23:50:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:50:32,740 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 38 states have internal predecessors, (55), 2 states have call successors, (3), 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 59 [2021-05-02 23:50:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:32,742 INFO L225 Difference]: With dead ends: 381 [2021-05-02 23:50:32,742 INFO L226 Difference]: Without dead ends: 302 [2021-05-02 23:50:32,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 2241.3ms TimeCoverageRelationStatistics Valid=279, Invalid=3027, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:50:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-02 23:50:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 219. [2021-05-02 23:50:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 211 states have (on average 1.1184834123222749) internal successors, (236), 212 states have internal predecessors, (236), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 243 transitions. [2021-05-02 23:50:32,824 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 243 transitions. Word has length 59 [2021-05-02 23:50:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:32,824 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 243 transitions. [2021-05-02 23:50:32,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 38 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 243 transitions. [2021-05-02 23:50:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:50:32,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:32,826 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:32,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-05-02 23:50:32,826 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1256427993, now seen corresponding path program 15 times [2021-05-02 23:50:32,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:32,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466910244] [2021-05-02 23:50:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:32,835 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_144 v_main_~c~0_728)) (< v_main_~c~0_728 199999)) InVars {main_~c~0=v_main_~c~0_728, ~last~0=v_~last~0_144} OutVars{main_~c~0=v_main_~c~0_728, ~last~0=v_~last~0_144} AuxVars[] AssignedVars[] [2021-05-02 23:50:32,839 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:32,860 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:32,864 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:32,883 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:32,893 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:32,917 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:32,951 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_145 v_main_~c~0_730) (< v_main_~c~0_730 199999)) InVars {main_~c~0=v_main_~c~0_730, ~last~0=v_~last~0_145} OutVars{main_~c~0=v_main_~c~0_730, ~last~0=v_~last~0_145} AuxVars[] AssignedVars[] [2021-05-02 23:50:32,953 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:32,977 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:32,980 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:32,998 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:33,003 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:33,008 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:33,026 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:33,030 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_146 v_main_~c~0_732)) (< v_main_~c~0_732 200000)) InVars {main_~c~0=v_main_~c~0_732, ~last~0=v_~last~0_146} OutVars{main_~c~0=v_main_~c~0_732, ~last~0=v_~last~0_146} AuxVars[] AssignedVars[] [2021-05-02 23:50:33,033 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:33,055 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:33,058 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:33,079 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:33,090 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:33,117 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:33,166 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_734 200000) (= v_~last~0_147 v_main_~c~0_734)) InVars {main_~c~0=v_main_~c~0_734, ~last~0=v_~last~0_147} OutVars{main_~c~0=v_main_~c~0_734, ~last~0=v_~last~0_147} AuxVars[] AssignedVars[] [2021-05-02 23:50:33,169 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:33,171 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:33,174 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:33,194 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:33,197 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:33,216 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:33,229 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:33,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:33,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:34,447 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:34,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466910244] [2021-05-02 23:50:34,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1466910244] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:34,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:34,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:50:34,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369045635] [2021-05-02 23:50:34,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:50:34,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:34,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:50:34,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:50:34,450 INFO L87 Difference]: Start difference. First operand 219 states and 243 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 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 23:50:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:35,854 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2021-05-02 23:50:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:50:35,856 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 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 23:50:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:35,858 INFO L225 Difference]: With dead ends: 324 [2021-05-02 23:50:35,858 INFO L226 Difference]: Without dead ends: 245 [2021-05-02 23:50:35,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1131.7ms TimeCoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:50:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-02 23:50:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 225. [2021-05-02 23:50:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 217 states have (on average 1.119815668202765) internal successors, (243), 218 states have internal predecessors, (243), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 250 transitions. [2021-05-02 23:50:35,958 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 250 transitions. Word has length 62 [2021-05-02 23:50:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:35,958 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 250 transitions. [2021-05-02 23:50:35,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 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 23:50:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 250 transitions. [2021-05-02 23:50:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:50:35,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:35,959 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:35,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-05-02 23:50:35,959 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1705435425, now seen corresponding path program 12 times [2021-05-02 23:50:35,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:35,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299235325] [2021-05-02 23:50:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:35,971 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_754 199999) (not (= v_~last~0_148 v_main_~c~0_754))) InVars {main_~c~0=v_main_~c~0_754, ~last~0=v_~last~0_148} OutVars{main_~c~0=v_main_~c~0_754, ~last~0=v_~last~0_148} AuxVars[] AssignedVars[] [2021-05-02 23:50:35,973 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:35,993 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:35,996 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:36,014 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:36,025 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:36,051 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:36,086 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_149 v_main_~c~0_756) (< v_main_~c~0_756 199999)) InVars {main_~c~0=v_main_~c~0_756, ~last~0=v_~last~0_149} OutVars{main_~c~0=v_main_~c~0_756, ~last~0=v_~last~0_149} AuxVars[] AssignedVars[] [2021-05-02 23:50:36,090 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:36,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:36,095 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:36,114 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:36,118 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:36,137 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:36,149 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:36,153 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_150 v_main_~c~0_758)) (< v_main_~c~0_758 200000)) InVars {main_~c~0=v_main_~c~0_758, ~last~0=v_~last~0_150} OutVars{main_~c~0=v_main_~c~0_758, ~last~0=v_~last~0_150} AuxVars[] AssignedVars[] [2021-05-02 23:50:36,155 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:36,157 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:36,166 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:36,187 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:36,197 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:36,238 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:36,276 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_151 v_main_~c~0_760) (< v_main_~c~0_760 200000)) InVars {main_~c~0=v_main_~c~0_760, ~last~0=v_~last~0_151} OutVars{main_~c~0=v_main_~c~0_760, ~last~0=v_~last~0_151} AuxVars[] AssignedVars[] [2021-05-02 23:50:36,280 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:36,306 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:36,310 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:36,328 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:36,332 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:36,335 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:36,347 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:36,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:36,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:37,767 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:37,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299235325] [2021-05-02 23:50:37,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299235325] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:37,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:37,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:50:37,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805521059] [2021-05-02 23:50:37,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:50:37,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:37,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:50:37,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:50:37,769 INFO L87 Difference]: Start difference. First operand 225 states and 250 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 26 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 23:50:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:38,904 INFO L93 Difference]: Finished difference Result 430 states and 471 transitions. [2021-05-02 23:50:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:50:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 26 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 23:50:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:38,907 INFO L225 Difference]: With dead ends: 430 [2021-05-02 23:50:38,908 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 23:50:38,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 20 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1277.0ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:50:38,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 23:50:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 269. [2021-05-02 23:50:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 261 states have (on average 1.0996168582375478) internal successors, (287), 262 states have internal predecessors, (287), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 294 transitions. [2021-05-02 23:50:39,064 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 294 transitions. Word has length 62 [2021-05-02 23:50:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:39,064 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 294 transitions. [2021-05-02 23:50:39,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 26 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 23:50:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 294 transitions. [2021-05-02 23:50:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:50:39,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:39,066 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:39,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-05-02 23:50:39,066 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:39,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1216637023, now seen corresponding path program 13 times [2021-05-02 23:50:39,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:39,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628377855] [2021-05-02 23:50:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:39,080 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_152 v_main_~c~0_780)) (< v_main_~c~0_780 199999)) InVars {main_~c~0=v_main_~c~0_780, ~last~0=v_~last~0_152} OutVars{main_~c~0=v_main_~c~0_780, ~last~0=v_~last~0_152} AuxVars[] AssignedVars[] [2021-05-02 23:50:39,084 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:39,105 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:39,109 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:39,127 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:39,138 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:39,163 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:39,208 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_782 199999) (= v_~last~0_153 v_main_~c~0_782)) InVars {main_~c~0=v_main_~c~0_782, ~last~0=v_~last~0_153} OutVars{main_~c~0=v_main_~c~0_782, ~last~0=v_~last~0_153} AuxVars[] AssignedVars[] [2021-05-02 23:50:39,210 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:39,212 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:39,215 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:39,231 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:39,235 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:39,254 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:39,268 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:39,271 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_154 v_main_~c~0_784)) (< v_main_~c~0_784 200000)) InVars {main_~c~0=v_main_~c~0_784, ~last~0=v_~last~0_154} OutVars{main_~c~0=v_main_~c~0_784, ~last~0=v_~last~0_154} AuxVars[] AssignedVars[] [2021-05-02 23:50:39,274 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:39,295 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:39,297 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:39,317 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:39,327 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:39,353 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:39,388 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_155 v_main_~c~0_786) (< v_main_~c~0_786 200000)) InVars {main_~c~0=v_main_~c~0_786, ~last~0=v_~last~0_155} OutVars{main_~c~0=v_main_~c~0_786, ~last~0=v_~last~0_155} AuxVars[] AssignedVars[] [2021-05-02 23:50:39,391 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:39,416 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:39,419 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:39,436 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:39,439 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:39,443 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:39,456 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:39,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:39,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:39,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:41,030 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:41,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628377855] [2021-05-02 23:50:41,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628377855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:41,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:41,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:50:41,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167849923] [2021-05-02 23:50:41,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:50:41,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:50:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:50:41,033 INFO L87 Difference]: Start difference. First operand 269 states and 294 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) 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 23:50:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:42,270 INFO L93 Difference]: Finished difference Result 468 states and 509 transitions. [2021-05-02 23:50:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:50:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) 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 23:50:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:42,273 INFO L225 Difference]: With dead ends: 468 [2021-05-02 23:50:42,273 INFO L226 Difference]: Without dead ends: 383 [2021-05-02 23:50:42,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1498.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:50:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-02 23:50:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 269. [2021-05-02 23:50:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 261 states have (on average 1.0996168582375478) internal successors, (287), 262 states have internal predecessors, (287), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 294 transitions. [2021-05-02 23:50:42,406 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 294 transitions. Word has length 62 [2021-05-02 23:50:42,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:42,406 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 294 transitions. [2021-05-02 23:50:42,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) 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 23:50:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 294 transitions. [2021-05-02 23:50:42,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:50:42,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:42,409 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:42,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-05-02 23:50:42,409 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:42,410 INFO L82 PathProgramCache]: Analyzing trace with hash -189137179, now seen corresponding path program 14 times [2021-05-02 23:50:42,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:42,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158156787] [2021-05-02 23:50:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:42,421 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_156 v_main_~c~0_806)) (< v_main_~c~0_806 199999)) InVars {main_~c~0=v_main_~c~0_806, ~last~0=v_~last~0_156} OutVars{main_~c~0=v_main_~c~0_806, ~last~0=v_~last~0_156} AuxVars[] AssignedVars[] [2021-05-02 23:50:42,424 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:42,426 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,429 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,448 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:42,459 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:42,506 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:42,546 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_808 199999) (= v_~last~0_157 v_main_~c~0_808)) InVars {main_~c~0=v_main_~c~0_808, ~last~0=v_~last~0_157} OutVars{main_~c~0=v_main_~c~0_808, ~last~0=v_~last~0_157} AuxVars[] AssignedVars[] [2021-05-02 23:50:42,549 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:42,551 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,555 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,574 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:42,578 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:42,599 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:42,613 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:42,616 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_810 200000) (not (= v_~last~0_158 v_main_~c~0_810))) InVars {main_~c~0=v_main_~c~0_810, ~last~0=v_~last~0_158} OutVars{main_~c~0=v_main_~c~0_810, ~last~0=v_~last~0_158} AuxVars[] AssignedVars[] [2021-05-02 23:50:42,619 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:42,641 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,647 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,667 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:42,679 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:42,706 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:42,759 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_812 200000) (= v_~last~0_159 v_main_~c~0_812)) InVars {main_~c~0=v_main_~c~0_812, ~last~0=v_~last~0_159} OutVars{main_~c~0=v_main_~c~0_812, ~last~0=v_~last~0_159} AuxVars[] AssignedVars[] [2021-05-02 23:50:42,762 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:42,765 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,769 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:42,794 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:42,798 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:42,825 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:42,841 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:42,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:43,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:43,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:44,970 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:44,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158156787] [2021-05-02 23:50:44,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [158156787] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:44,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:44,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:50:44,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143123278] [2021-05-02 23:50:44,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:50:44,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:50:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:50:44,973 INFO L87 Difference]: Start difference. First operand 269 states and 294 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 35 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 23:50:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:47,057 INFO L93 Difference]: Finished difference Result 453 states and 494 transitions. [2021-05-02 23:50:47,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:50:47,058 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 35 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 23:50:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:47,060 INFO L225 Difference]: With dead ends: 453 [2021-05-02 23:50:47,060 INFO L226 Difference]: Without dead ends: 368 [2021-05-02 23:50:47,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2389.0ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:50:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-05-02 23:50:47,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 269. [2021-05-02 23:50:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 261 states have (on average 1.0996168582375478) internal successors, (287), 262 states have internal predecessors, (287), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 294 transitions. [2021-05-02 23:50:47,173 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 294 transitions. Word has length 62 [2021-05-02 23:50:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:47,173 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 294 transitions. [2021-05-02 23:50:47,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 35 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 23:50:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 294 transitions. [2021-05-02 23:50:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:50:47,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:47,175 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:47,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2021-05-02 23:50:47,175 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:47,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:47,176 INFO L82 PathProgramCache]: Analyzing trace with hash -323150685, now seen corresponding path program 16 times [2021-05-02 23:50:47,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:47,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131340484] [2021-05-02 23:50:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:47,184 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_832 199999) (not (= v_~last~0_160 v_main_~c~0_832))) InVars {main_~c~0=v_main_~c~0_832, ~last~0=v_~last~0_160} OutVars{main_~c~0=v_main_~c~0_832, ~last~0=v_~last~0_160} AuxVars[] AssignedVars[] [2021-05-02 23:50:47,187 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:47,212 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:47,216 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:47,237 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:47,247 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:47,273 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:47,304 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:47,309 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_161 v_main_~c~0_834)) (< v_main_~c~0_834 200000)) InVars {main_~c~0=v_main_~c~0_834, ~last~0=v_~last~0_161} OutVars{main_~c~0=v_main_~c~0_834, ~last~0=v_~last~0_161} AuxVars[] AssignedVars[] [2021-05-02 23:50:47,312 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:47,314 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:47,317 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:47,334 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:47,344 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:47,386 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:47,415 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:50:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:47,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:49,718 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:49,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131340484] [2021-05-02 23:50:49,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1131340484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:49,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:49,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:50:49,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366361808] [2021-05-02 23:50:49,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:50:49,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:49,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:50:49,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1713, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:50:49,720 INFO L87 Difference]: Start difference. First operand 269 states and 294 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 40 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 23:50:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:52,468 INFO L93 Difference]: Finished difference Result 446 states and 489 transitions. [2021-05-02 23:50:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:50:52,469 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 40 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 23:50:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:52,471 INFO L225 Difference]: With dead ends: 446 [2021-05-02 23:50:52,471 INFO L226 Difference]: Without dead ends: 361 [2021-05-02 23:50:52,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 3189.3ms TimeCoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:50:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-02 23:50:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 272. [2021-05-02 23:50:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 264 states have (on average 1.1022727272727273) internal successors, (291), 265 states have internal predecessors, (291), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 298 transitions. [2021-05-02 23:50:52,603 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 298 transitions. Word has length 62 [2021-05-02 23:50:52,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:52,604 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 298 transitions. [2021-05-02 23:50:52,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 40 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 23:50:52,604 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 298 transitions. [2021-05-02 23:50:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:50:52,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:52,606 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:52,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2021-05-02 23:50:52,606 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 189142052, now seen corresponding path program 16 times [2021-05-02 23:50:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:52,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860165241] [2021-05-02 23:50:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:52,621 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_853 199999) (not (= v_~last~0_162 v_main_~c~0_853))) InVars {main_~c~0=v_main_~c~0_853, ~last~0=v_~last~0_162} OutVars{main_~c~0=v_main_~c~0_853, ~last~0=v_~last~0_162} AuxVars[] AssignedVars[] [2021-05-02 23:50:52,625 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:52,627 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:52,633 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:52,657 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:52,671 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:52,734 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:52,787 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_855 199999) (= v_~last~0_163 v_main_~c~0_855)) InVars {main_~c~0=v_main_~c~0_855, ~last~0=v_~last~0_163} OutVars{main_~c~0=v_main_~c~0_855, ~last~0=v_~last~0_163} AuxVars[] AssignedVars[] [2021-05-02 23:50:52,790 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:52,792 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:52,797 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:52,817 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:52,821 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:52,848 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:52,864 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:52,867 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_164 v_main_~c~0_857)) (< v_main_~c~0_857 200000)) InVars {main_~c~0=v_main_~c~0_857, ~last~0=v_~last~0_164} OutVars{main_~c~0=v_main_~c~0_857, ~last~0=v_~last~0_164} AuxVars[] AssignedVars[] [2021-05-02 23:50:52,870 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:52,895 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:52,898 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:52,922 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:52,935 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:52,970 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:53,006 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_165 v_main_~c~0_859) (< v_main_~c~0_859 200000)) InVars {main_~c~0=v_main_~c~0_859, ~last~0=v_~last~0_165} OutVars{main_~c~0=v_main_~c~0_859, ~last~0=v_~last~0_165} AuxVars[] AssignedVars[] [2021-05-02 23:50:53,009 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:53,011 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:53,013 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:53,026 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:53,030 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:53,050 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:53,062 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:53,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:53,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:54,298 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:54,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860165241] [2021-05-02 23:50:54,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1860165241] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:54,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:54,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:50:54,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533010799] [2021-05-02 23:50:54,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:50:54,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:50:54,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:50:54,300 INFO L87 Difference]: Start difference. First operand 272 states and 298 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 38 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:55,712 INFO L93 Difference]: Finished difference Result 380 states and 420 transitions. [2021-05-02 23:50:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:50:55,713 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 38 states have internal predecessors, (61), 2 states have call successors, (3), 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 65 [2021-05-02 23:50:55,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:55,715 INFO L225 Difference]: With dead ends: 380 [2021-05-02 23:50:55,715 INFO L226 Difference]: Without dead ends: 295 [2021-05-02 23:50:55,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1137.5ms TimeCoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:50:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-02 23:50:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 275. [2021-05-02 23:50:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 267 states have (on average 1.101123595505618) internal successors, (294), 268 states have internal predecessors, (294), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 301 transitions. [2021-05-02 23:50:55,859 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 301 transitions. Word has length 65 [2021-05-02 23:50:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:55,860 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 301 transitions. [2021-05-02 23:50:55,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 38 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 301 transitions. [2021-05-02 23:50:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:50:55,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:55,862 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:55,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-05-02 23:50:55,862 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:55,862 INFO L82 PathProgramCache]: Analyzing trace with hash -759063582, now seen corresponding path program 15 times [2021-05-02 23:50:55,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:55,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146522282] [2021-05-02 23:50:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:55,901 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_880 199999) (not (= v_~last~0_166 v_main_~c~0_880))) InVars {main_~c~0=v_main_~c~0_880, ~last~0=v_~last~0_166} OutVars{main_~c~0=v_main_~c~0_880, ~last~0=v_~last~0_166} AuxVars[] AssignedVars[] [2021-05-02 23:50:55,904 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:55,929 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:55,938 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:55,965 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:55,981 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:56,017 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:56,064 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_167 v_main_~c~0_882) (< v_main_~c~0_882 199999)) InVars {main_~c~0=v_main_~c~0_882, ~last~0=v_~last~0_167} OutVars{main_~c~0=v_main_~c~0_882, ~last~0=v_~last~0_167} AuxVars[] AssignedVars[] [2021-05-02 23:50:56,067 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:56,101 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:56,105 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:56,128 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:56,132 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:56,136 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:56,151 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:56,153 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_168 v_main_~c~0_884)) (< v_main_~c~0_884 200000)) InVars {main_~c~0=v_main_~c~0_884, ~last~0=v_~last~0_168} OutVars{main_~c~0=v_main_~c~0_884, ~last~0=v_~last~0_168} AuxVars[] AssignedVars[] [2021-05-02 23:50:56,156 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:56,159 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:56,162 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:56,190 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:56,207 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:56,259 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:56,304 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_886 200000) (= v_~last~0_169 v_main_~c~0_886)) InVars {main_~c~0=v_main_~c~0_886, ~last~0=v_~last~0_169} OutVars{main_~c~0=v_main_~c~0_886, ~last~0=v_~last~0_169} AuxVars[] AssignedVars[] [2021-05-02 23:50:56,308 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:56,339 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:56,345 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:56,367 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:56,372 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:56,376 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:56,393 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:56,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:56,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:57,967 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:57,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146522282] [2021-05-02 23:50:57,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146522282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:57,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:57,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:50:57,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895446367] [2021-05-02 23:50:57,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:50:57,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:57,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:50:57,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:50:57,969 INFO L87 Difference]: Start difference. First operand 275 states and 301 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:59,060 INFO L93 Difference]: Finished difference Result 486 states and 528 transitions. [2021-05-02 23:50:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:50:59,062 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 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 65 [2021-05-02 23:50:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:59,064 INFO L225 Difference]: With dead ends: 486 [2021-05-02 23:50:59,064 INFO L226 Difference]: Without dead ends: 398 [2021-05-02 23:50:59,065 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1435.1ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:50:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-02 23:50:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 275. [2021-05-02 23:50:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 267 states have (on average 1.101123595505618) internal successors, (294), 268 states have internal predecessors, (294), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:50:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 301 transitions. [2021-05-02 23:50:59,198 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 301 transitions. Word has length 65 [2021-05-02 23:50:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:59,199 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 301 transitions. [2021-05-02 23:50:59,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 301 transitions. [2021-05-02 23:50:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:50:59,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:59,201 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:59,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-05-02 23:50:59,201 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash 613831266, now seen corresponding path program 16 times [2021-05-02 23:50:59,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:59,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465883527] [2021-05-02 23:50:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:59,216 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_907 199999) (not (= v_~last~0_170 v_main_~c~0_907))) InVars {main_~c~0=v_main_~c~0_907, ~last~0=v_~last~0_170} OutVars{main_~c~0=v_main_~c~0_907, ~last~0=v_~last~0_170} AuxVars[] AssignedVars[] [2021-05-02 23:50:59,219 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:59,241 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:59,244 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:59,266 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:59,278 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:59,306 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:59,344 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_171 v_main_~c~0_909) (< v_main_~c~0_909 199999)) InVars {main_~c~0=v_main_~c~0_909, ~last~0=v_~last~0_171} OutVars{main_~c~0=v_main_~c~0_909, ~last~0=v_~last~0_171} AuxVars[] AssignedVars[] [2021-05-02 23:50:59,347 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:59,379 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:59,383 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:59,401 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:59,405 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:59,409 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:59,422 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:59,425 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_911 200000) (not (= v_~last~0_172 v_main_~c~0_911))) InVars {main_~c~0=v_main_~c~0_911, ~last~0=v_~last~0_172} OutVars{main_~c~0=v_main_~c~0_911, ~last~0=v_~last~0_172} AuxVars[] AssignedVars[] [2021-05-02 23:50:59,427 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:50:59,429 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:59,433 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:59,453 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:50:59,464 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:50:59,512 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:50:59,546 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_173 v_main_~c~0_913) (< v_main_~c~0_913 200000)) InVars {main_~c~0=v_main_~c~0_913, ~last~0=v_~last~0_173} OutVars{main_~c~0=v_main_~c~0_913, ~last~0=v_~last~0_173} AuxVars[] AssignedVars[] [2021-05-02 23:50:59,549 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:50:59,551 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:59,554 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:59,585 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:50:59,589 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:50:59,612 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:50:59,625 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:59,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:59,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:01,257 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:01,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465883527] [2021-05-02 23:51:01,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [465883527] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:01,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:01,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:51:01,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037198512] [2021-05-02 23:51:01,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:51:01,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:51:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:51:01,259 INFO L87 Difference]: Start difference. First operand 275 states and 301 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 30 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:02,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:02,741 INFO L93 Difference]: Finished difference Result 481 states and 523 transitions. [2021-05-02 23:51:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:51:02,742 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 30 states have internal predecessors, (61), 2 states have call successors, (3), 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 65 [2021-05-02 23:51:02,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:02,745 INFO L225 Difference]: With dead ends: 481 [2021-05-02 23:51:02,745 INFO L226 Difference]: Without dead ends: 393 [2021-05-02 23:51:02,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1606.7ms TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:51:02,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-02 23:51:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 275. [2021-05-02 23:51:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 267 states have (on average 1.101123595505618) internal successors, (294), 268 states have internal predecessors, (294), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 301 transitions. [2021-05-02 23:51:02,894 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 301 transitions. Word has length 65 [2021-05-02 23:51:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:02,895 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 301 transitions. [2021-05-02 23:51:02,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 30 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 301 transitions. [2021-05-02 23:51:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:51:02,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:02,897 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:02,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2021-05-02 23:51:02,897 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1641331110, now seen corresponding path program 17 times [2021-05-02 23:51:02,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:02,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255043691] [2021-05-02 23:51:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:02,911 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_174 v_main_~c~0_934)) (< v_main_~c~0_934 199999)) InVars {main_~c~0=v_main_~c~0_934, ~last~0=v_~last~0_174} OutVars{main_~c~0=v_main_~c~0_934, ~last~0=v_~last~0_174} AuxVars[] AssignedVars[] [2021-05-02 23:51:02,914 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:02,937 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:02,941 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:02,965 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:02,979 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:03,011 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:03,054 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_175 v_main_~c~0_936) (< v_main_~c~0_936 199999)) InVars {main_~c~0=v_main_~c~0_936, ~last~0=v_~last~0_175} OutVars{main_~c~0=v_main_~c~0_936, ~last~0=v_~last~0_175} AuxVars[] AssignedVars[] [2021-05-02 23:51:03,058 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:03,089 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:03,093 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:03,114 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:03,119 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:03,123 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:03,136 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:03,140 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_938 200000) (not (= v_~last~0_176 v_main_~c~0_938))) InVars {main_~c~0=v_main_~c~0_938, ~last~0=v_~last~0_176} OutVars{main_~c~0=v_main_~c~0_938, ~last~0=v_~last~0_176} AuxVars[] AssignedVars[] [2021-05-02 23:51:03,142 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:03,144 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:03,152 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:03,171 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:03,183 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:03,230 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:03,268 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_177 v_main_~c~0_940) (< v_main_~c~0_940 200000)) InVars {main_~c~0=v_main_~c~0_940, ~last~0=v_~last~0_177} OutVars{main_~c~0=v_main_~c~0_940, ~last~0=v_~last~0_177} AuxVars[] AssignedVars[] [2021-05-02 23:51:03,271 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:03,296 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:03,299 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:03,320 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:03,324 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:03,328 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:03,341 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:03,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:03,486 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 23:51:03,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:05,438 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:05,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255043691] [2021-05-02 23:51:05,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255043691] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:05,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:05,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:51:05,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176592731] [2021-05-02 23:51:05,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:51:05,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:05,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:51:05,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:51:05,440 INFO L87 Difference]: Start difference. First operand 275 states and 301 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 37 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:07,721 INFO L93 Difference]: Finished difference Result 466 states and 508 transitions. [2021-05-02 23:51:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:51:07,723 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 37 states have internal predecessors, (61), 2 states have call successors, (3), 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 65 [2021-05-02 23:51:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:07,725 INFO L225 Difference]: With dead ends: 466 [2021-05-02 23:51:07,726 INFO L226 Difference]: Without dead ends: 378 [2021-05-02 23:51:07,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2482.2ms TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:51:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-02 23:51:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 275. [2021-05-02 23:51:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 267 states have (on average 1.101123595505618) internal successors, (294), 268 states have internal predecessors, (294), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 301 transitions. [2021-05-02 23:51:07,854 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 301 transitions. Word has length 65 [2021-05-02 23:51:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:07,855 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 301 transitions. [2021-05-02 23:51:07,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 37 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 301 transitions. [2021-05-02 23:51:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 23:51:07,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:07,857 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:07,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2021-05-02 23:51:07,858 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:07,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1507317604, now seen corresponding path program 17 times [2021-05-02 23:51:07,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:07,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733096547] [2021-05-02 23:51:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:07,867 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_961 199999) (not (= v_~last~0_178 v_main_~c~0_961))) InVars {main_~c~0=v_main_~c~0_961, ~last~0=v_~last~0_178} OutVars{main_~c~0=v_main_~c~0_961, ~last~0=v_~last~0_178} AuxVars[] AssignedVars[] [2021-05-02 23:51:07,870 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:07,892 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:07,897 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:07,917 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:07,934 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:07,963 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:08,004 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:08,008 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_963 200000) (not (= v_~last~0_179 v_main_~c~0_963))) InVars {main_~c~0=v_main_~c~0_963, ~last~0=v_~last~0_179} OutVars{main_~c~0=v_main_~c~0_963, ~last~0=v_~last~0_179} AuxVars[] AssignedVars[] [2021-05-02 23:51:08,011 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:08,013 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:08,016 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:08,039 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:08,052 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:08,110 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:08,141 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:08,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:10,127 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:10,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733096547] [2021-05-02 23:51:10,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [733096547] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:10,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:10,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:51:10,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225039772] [2021-05-02 23:51:10,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:51:10,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:10,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:51:10,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:51:10,129 INFO L87 Difference]: Start difference. First operand 275 states and 301 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 42 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:12,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:12,347 INFO L93 Difference]: Finished difference Result 459 states and 503 transitions. [2021-05-02 23:51:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:51:12,349 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 42 states have internal predecessors, (61), 2 states have call successors, (3), 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 65 [2021-05-02 23:51:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:12,350 INFO L225 Difference]: With dead ends: 459 [2021-05-02 23:51:12,351 INFO L226 Difference]: Without dead ends: 371 [2021-05-02 23:51:12,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2681.3ms TimeCoverageRelationStatistics Valid=311, Invalid=3721, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:51:12,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-02 23:51:12,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 278. [2021-05-02 23:51:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 270 states have (on average 1.1037037037037036) internal successors, (298), 271 states have internal predecessors, (298), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 305 transitions. [2021-05-02 23:51:12,529 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 305 transitions. Word has length 65 [2021-05-02 23:51:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:12,529 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 305 transitions. [2021-05-02 23:51:12,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 42 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 305 transitions. [2021-05-02 23:51:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:51:12,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:12,531 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:12,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-05-02 23:51:12,532 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1153036353, now seen corresponding path program 2 times [2021-05-02 23:51:12,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:12,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949791302] [2021-05-02 23:51:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:12,546 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:51:12,548 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:12,570 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-02 23:51:12,588 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:12,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:13,355 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:13,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949791302] [2021-05-02 23:51:13,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949791302] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:13,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:13,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:51:13,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006343767] [2021-05-02 23:51:13,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:51:13,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:51:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:51:13,358 INFO L87 Difference]: Start difference. First operand 278 states and 305 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:51:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:14,251 INFO L93 Difference]: Finished difference Result 429 states and 468 transitions. [2021-05-02 23:51:14,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:51:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2021-05-02 23:51:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:14,255 INFO L225 Difference]: With dead ends: 429 [2021-05-02 23:51:14,255 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 23:51:14,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 14 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 676.0ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:51:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 23:51:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 278. [2021-05-02 23:51:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 270 states have (on average 1.1) internal successors, (297), 271 states have internal predecessors, (297), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 304 transitions. [2021-05-02 23:51:14,374 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 304 transitions. Word has length 68 [2021-05-02 23:51:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:14,374 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 304 transitions. [2021-05-02 23:51:14,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:51:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 304 transitions. [2021-05-02 23:51:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:51:14,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:14,375 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:14,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-05-02 23:51:14,376 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:14,376 INFO L82 PathProgramCache]: Analyzing trace with hash -470724345, now seen corresponding path program 17 times [2021-05-02 23:51:14,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:14,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379010804] [2021-05-02 23:51:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:14,389 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1013 199999) (not (= v_~last~0_181 v_main_~c~0_1013))) InVars {main_~c~0=v_main_~c~0_1013, ~last~0=v_~last~0_181} OutVars{main_~c~0=v_main_~c~0_1013, ~last~0=v_~last~0_181} AuxVars[] AssignedVars[] [2021-05-02 23:51:14,392 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:14,395 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:14,399 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:14,423 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:14,435 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:14,491 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:14,537 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1015 199999) (= v_~last~0_182 v_main_~c~0_1015)) InVars {main_~c~0=v_main_~c~0_1015, ~last~0=v_~last~0_182} OutVars{main_~c~0=v_main_~c~0_1015, ~last~0=v_~last~0_182} AuxVars[] AssignedVars[] [2021-05-02 23:51:14,541 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:14,574 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:14,578 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:14,602 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:14,606 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:14,610 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:14,627 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:14,631 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1017 200000) (not (= v_~last~0_183 v_main_~c~0_1017))) InVars {main_~c~0=v_main_~c~0_1017, ~last~0=v_~last~0_183} OutVars{main_~c~0=v_main_~c~0_1017, ~last~0=v_~last~0_183} AuxVars[] AssignedVars[] [2021-05-02 23:51:14,634 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:14,664 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:14,668 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:14,694 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:14,714 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:14,751 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:14,800 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_184 v_main_~c~0_1019) (< v_main_~c~0_1019 200000)) InVars {main_~c~0=v_main_~c~0_1019, ~last~0=v_~last~0_184} OutVars{main_~c~0=v_main_~c~0_1019, ~last~0=v_~last~0_184} AuxVars[] AssignedVars[] [2021-05-02 23:51:14,804 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:14,806 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:14,811 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:14,832 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:14,837 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:14,866 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:14,885 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:14,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:14,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:16,358 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:16,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379010804] [2021-05-02 23:51:16,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379010804] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:16,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:16,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:51:16,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821116566] [2021-05-02 23:51:16,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:51:16,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:16,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:51:16,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:51:16,361 INFO L87 Difference]: Start difference. First operand 278 states and 304 transitions. Second operand has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 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 23:51:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:17,982 INFO L93 Difference]: Finished difference Result 410 states and 450 transitions. [2021-05-02 23:51:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:51:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 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 23:51:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:17,985 INFO L225 Difference]: With dead ends: 410 [2021-05-02 23:51:17,986 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 23:51:17,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1365.0ms TimeCoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:51:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 23:51:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2021-05-02 23:51:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 273 states have (on average 1.098901098901099) internal successors, (300), 274 states have internal predecessors, (300), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 307 transitions. [2021-05-02 23:51:18,151 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 307 transitions. Word has length 68 [2021-05-02 23:51:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:18,151 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 307 transitions. [2021-05-02 23:51:18,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 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 23:51:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 307 transitions. [2021-05-02 23:51:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:51:18,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:18,153 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:18,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-05-02 23:51:18,153 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1816944001, now seen corresponding path program 18 times [2021-05-02 23:51:18,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:18,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653695554] [2021-05-02 23:51:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:18,169 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1041 199999) (not (= v_~last~0_185 v_main_~c~0_1041))) InVars {main_~c~0=v_main_~c~0_1041, ~last~0=v_~last~0_185} OutVars{main_~c~0=v_main_~c~0_1041, ~last~0=v_~last~0_185} AuxVars[] AssignedVars[] [2021-05-02 23:51:18,172 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:18,199 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:18,203 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:18,231 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:18,246 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:18,284 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:18,323 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1043 199999) (= v_~last~0_186 v_main_~c~0_1043)) InVars {main_~c~0=v_main_~c~0_1043, ~last~0=v_~last~0_186} OutVars{main_~c~0=v_main_~c~0_1043, ~last~0=v_~last~0_186} AuxVars[] AssignedVars[] [2021-05-02 23:51:18,326 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:18,358 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:18,361 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:18,382 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:18,386 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:18,390 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:18,403 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:18,410 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1045 200000) (not (= v_~last~0_187 v_main_~c~0_1045))) InVars {main_~c~0=v_main_~c~0_1045, ~last~0=v_~last~0_187} OutVars{main_~c~0=v_main_~c~0_1045, ~last~0=v_~last~0_187} AuxVars[] AssignedVars[] [2021-05-02 23:51:18,417 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:18,419 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:18,423 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:18,447 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:18,460 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:18,504 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:18,546 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_188 v_main_~c~0_1047) (< v_main_~c~0_1047 200000)) InVars {main_~c~0=v_main_~c~0_1047, ~last~0=v_~last~0_188} OutVars{main_~c~0=v_main_~c~0_1047, ~last~0=v_~last~0_188} AuxVars[] AssignedVars[] [2021-05-02 23:51:18,549 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:18,552 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:18,556 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:18,574 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:18,578 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:18,602 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:18,619 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:18,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:18,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:20,804 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:20,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653695554] [2021-05-02 23:51:20,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653695554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:20,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:20,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:51:20,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679381125] [2021-05-02 23:51:20,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:51:20,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:20,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:51:20,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:51:20,806 INFO L87 Difference]: Start difference. First operand 281 states and 307 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 30 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 23:51:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:21,986 INFO L93 Difference]: Finished difference Result 547 states and 591 transitions. [2021-05-02 23:51:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:51:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 30 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 23:51:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:21,988 INFO L225 Difference]: With dead ends: 547 [2021-05-02 23:51:21,988 INFO L226 Difference]: Without dead ends: 432 [2021-05-02 23:51:21,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 18 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 2052.2ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:51:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-02 23:51:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 281. [2021-05-02 23:51:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 273 states have (on average 1.098901098901099) internal successors, (300), 274 states have internal predecessors, (300), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 307 transitions. [2021-05-02 23:51:22,095 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 307 transitions. Word has length 68 [2021-05-02 23:51:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:22,095 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 307 transitions. [2021-05-02 23:51:22,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 30 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 23:51:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 307 transitions. [2021-05-02 23:51:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:51:22,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:22,096 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:22,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-05-02 23:51:22,096 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1105128447, now seen corresponding path program 19 times [2021-05-02 23:51:22,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:22,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574306711] [2021-05-02 23:51:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:22,104 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1069 199999) (not (= v_~last~0_189 v_main_~c~0_1069))) InVars {main_~c~0=v_main_~c~0_1069, ~last~0=v_~last~0_189} OutVars{main_~c~0=v_main_~c~0_1069, ~last~0=v_~last~0_189} AuxVars[] AssignedVars[] [2021-05-02 23:51:22,106 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:22,119 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:22,121 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:22,134 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:22,141 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:22,158 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:22,183 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1071 199999) (= v_~last~0_190 v_main_~c~0_1071)) InVars {main_~c~0=v_main_~c~0_1071, ~last~0=v_~last~0_190} OutVars{main_~c~0=v_main_~c~0_1071, ~last~0=v_~last~0_190} AuxVars[] AssignedVars[] [2021-05-02 23:51:22,185 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:22,186 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:22,187 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:22,199 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:22,202 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:22,215 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:22,224 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:22,225 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_191 v_main_~c~0_1073)) (< v_main_~c~0_1073 200000)) InVars {main_~c~0=v_main_~c~0_1073, ~last~0=v_~last~0_191} OutVars{main_~c~0=v_main_~c~0_1073, ~last~0=v_~last~0_191} AuxVars[] AssignedVars[] [2021-05-02 23:51:22,227 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:22,239 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:22,241 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:22,253 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:22,260 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:22,277 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:22,305 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_192 v_main_~c~0_1075) (< v_main_~c~0_1075 200000)) InVars {main_~c~0=v_main_~c~0_1075, ~last~0=v_~last~0_192} OutVars{main_~c~0=v_main_~c~0_1075, ~last~0=v_~last~0_192} AuxVars[] AssignedVars[] [2021-05-02 23:51:22,306 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:22,307 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:22,309 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:22,320 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:22,322 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:22,336 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:22,345 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:22,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:22,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:23,691 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574306711] [2021-05-02 23:51:23,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [574306711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:23,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:23,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:51:23,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831457330] [2021-05-02 23:51:23,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:51:23,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:23,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:51:23,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:51:23,693 INFO L87 Difference]: Start difference. First operand 281 states and 307 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 32 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 23:51:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:25,094 INFO L93 Difference]: Finished difference Result 542 states and 586 transitions. [2021-05-02 23:51:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:51:25,096 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 32 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 23:51:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:25,097 INFO L225 Difference]: With dead ends: 542 [2021-05-02 23:51:25,097 INFO L226 Difference]: Without dead ends: 427 [2021-05-02 23:51:25,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1377.6ms TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:51:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-02 23:51:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 281. [2021-05-02 23:51:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 273 states have (on average 1.098901098901099) internal successors, (300), 274 states have internal predecessors, (300), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 307 transitions. [2021-05-02 23:51:25,249 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 307 transitions. Word has length 68 [2021-05-02 23:51:25,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:25,249 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 307 transitions. [2021-05-02 23:51:25,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 32 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 23:51:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 307 transitions. [2021-05-02 23:51:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:51:25,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:25,250 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:25,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2021-05-02 23:51:25,250 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:25,250 INFO L82 PathProgramCache]: Analyzing trace with hash -77628603, now seen corresponding path program 20 times [2021-05-02 23:51:25,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:25,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547793349] [2021-05-02 23:51:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:25,258 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1097 199999) (not (= v_~last~0_193 v_main_~c~0_1097))) InVars {main_~c~0=v_main_~c~0_1097, ~last~0=v_~last~0_193} OutVars{main_~c~0=v_main_~c~0_1097, ~last~0=v_~last~0_193} AuxVars[] AssignedVars[] [2021-05-02 23:51:25,260 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:25,276 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,279 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,293 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:25,301 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:25,320 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:25,351 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_194 v_main_~c~0_1099) (< v_main_~c~0_1099 199999)) InVars {main_~c~0=v_main_~c~0_1099, ~last~0=v_~last~0_194} OutVars{main_~c~0=v_main_~c~0_1099, ~last~0=v_~last~0_194} AuxVars[] AssignedVars[] [2021-05-02 23:51:25,353 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:25,354 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,356 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,371 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:25,375 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:25,390 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:25,401 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:25,411 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1101 200000) (not (= v_~last~0_195 v_main_~c~0_1101))) InVars {main_~c~0=v_main_~c~0_1101, ~last~0=v_~last~0_195} OutVars{main_~c~0=v_main_~c~0_1101, ~last~0=v_~last~0_195} AuxVars[] AssignedVars[] [2021-05-02 23:51:25,413 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:25,428 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,431 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,446 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:25,454 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:25,474 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:25,505 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1103 200000) (= v_~last~0_196 v_main_~c~0_1103)) InVars {main_~c~0=v_main_~c~0_1103, ~last~0=v_~last~0_196} OutVars{main_~c~0=v_main_~c~0_1103, ~last~0=v_~last~0_196} AuxVars[] AssignedVars[] [2021-05-02 23:51:25,507 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:25,509 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,511 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:25,526 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:25,529 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:25,544 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:25,555 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:25,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:25,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:27,402 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547793349] [2021-05-02 23:51:27,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [547793349] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:27,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:27,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:51:27,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122337186] [2021-05-02 23:51:27,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:51:27,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:51:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:51:27,404 INFO L87 Difference]: Start difference. First operand 281 states and 307 transitions. Second operand has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 39 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 23:51:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:29,259 INFO L93 Difference]: Finished difference Result 527 states and 571 transitions. [2021-05-02 23:51:29,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:51:29,260 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 39 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 23:51:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:29,262 INFO L225 Difference]: With dead ends: 527 [2021-05-02 23:51:29,262 INFO L226 Difference]: Without dead ends: 412 [2021-05-02 23:51:29,262 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2182.6ms TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:51:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-02 23:51:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 281. [2021-05-02 23:51:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 273 states have (on average 1.098901098901099) internal successors, (300), 274 states have internal predecessors, (300), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 307 transitions. [2021-05-02 23:51:29,364 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 307 transitions. Word has length 68 [2021-05-02 23:51:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:29,364 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 307 transitions. [2021-05-02 23:51:29,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 39 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 23:51:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 307 transitions. [2021-05-02 23:51:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:51:29,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:29,366 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:29,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2021-05-02 23:51:29,366 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash -211642109, now seen corresponding path program 18 times [2021-05-02 23:51:29,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:29,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082414785] [2021-05-02 23:51:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:29,374 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1125 199999) (not (= v_~last~0_197 v_main_~c~0_1125))) InVars {main_~c~0=v_main_~c~0_1125, ~last~0=v_~last~0_197} OutVars{main_~c~0=v_main_~c~0_1125, ~last~0=v_~last~0_197} AuxVars[] AssignedVars[] [2021-05-02 23:51:29,376 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:29,390 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:29,392 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:29,407 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:29,415 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:29,434 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:29,461 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:29,463 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_198 v_main_~c~0_1127)) (< v_main_~c~0_1127 200000)) InVars {main_~c~0=v_main_~c~0_1127, ~last~0=v_~last~0_198} OutVars{main_~c~0=v_main_~c~0_1127, ~last~0=v_~last~0_198} AuxVars[] AssignedVars[] [2021-05-02 23:51:29,464 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:29,465 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:29,467 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:29,481 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:29,488 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:29,517 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:29,541 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:29,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:32,223 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:32,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082414785] [2021-05-02 23:51:32,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082414785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:32,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:32,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:51:32,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483142626] [2021-05-02 23:51:32,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:51:32,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:32,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:51:32,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2059, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:51:32,226 INFO L87 Difference]: Start difference. First operand 281 states and 307 transitions. Second operand has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 44 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 23:51:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:36,309 INFO L93 Difference]: Finished difference Result 520 states and 566 transitions. [2021-05-02 23:51:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:51:36,311 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 44 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 23:51:36,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:36,313 INFO L225 Difference]: With dead ends: 520 [2021-05-02 23:51:36,313 INFO L226 Difference]: Without dead ends: 405 [2021-05-02 23:51:36,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 3965.5ms TimeCoverageRelationStatistics Valid=327, Invalid=4095, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:51:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-02 23:51:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 284. [2021-05-02 23:51:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 276 states have (on average 1.1014492753623188) internal successors, (304), 277 states have internal predecessors, (304), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 311 transitions. [2021-05-02 23:51:36,444 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 311 transitions. Word has length 68 [2021-05-02 23:51:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:36,445 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 311 transitions. [2021-05-02 23:51:36,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 44 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 23:51:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 311 transitions. [2021-05-02 23:51:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:51:36,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:36,447 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:36,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2021-05-02 23:51:36,447 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:36,447 INFO L82 PathProgramCache]: Analyzing trace with hash -485243580, now seen corresponding path program 18 times [2021-05-02 23:51:36,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:36,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975229682] [2021-05-02 23:51:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:36,469 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1148 199999) (not (= v_~last~0_199 v_main_~c~0_1148))) InVars {main_~c~0=v_main_~c~0_1148, ~last~0=v_~last~0_199} OutVars{main_~c~0=v_main_~c~0_1148, ~last~0=v_~last~0_199} AuxVars[] AssignedVars[] [2021-05-02 23:51:36,474 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:36,495 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:36,499 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:36,517 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:36,529 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:36,556 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:36,593 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1150 199999) (= v_~last~0_200 v_main_~c~0_1150)) InVars {main_~c~0=v_main_~c~0_1150, ~last~0=v_~last~0_200} OutVars{main_~c~0=v_main_~c~0_1150, ~last~0=v_~last~0_200} AuxVars[] AssignedVars[] [2021-05-02 23:51:36,596 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:36,623 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:36,625 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:36,641 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:36,645 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:36,649 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:36,663 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:36,666 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_201 v_main_~c~0_1152)) (< v_main_~c~0_1152 200000)) InVars {main_~c~0=v_main_~c~0_1152, ~last~0=v_~last~0_201} OutVars{main_~c~0=v_main_~c~0_1152, ~last~0=v_~last~0_201} AuxVars[] AssignedVars[] [2021-05-02 23:51:36,669 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:36,671 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:36,675 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:36,697 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:36,723 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:36,780 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:36,822 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_202 v_main_~c~0_1154) (< v_main_~c~0_1154 200000)) InVars {main_~c~0=v_main_~c~0_1154, ~last~0=v_~last~0_202} OutVars{main_~c~0=v_main_~c~0_1154, ~last~0=v_~last~0_202} AuxVars[] AssignedVars[] [2021-05-02 23:51:36,826 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:36,828 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:36,831 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:36,853 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:36,857 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:36,880 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:36,895 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:36,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:36,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:38,545 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:38,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975229682] [2021-05-02 23:51:38,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975229682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:38,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:38,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:51:38,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252682060] [2021-05-02 23:51:38,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:51:38,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:38,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:51:38,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1704, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:51:38,548 INFO L87 Difference]: Start difference. First operand 284 states and 311 transitions. Second operand has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 42 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:40,511 INFO L93 Difference]: Finished difference Result 419 states and 460 transitions. [2021-05-02 23:51:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:51:40,513 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 42 states have internal predecessors, (67), 2 states have call successors, (3), 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 71 [2021-05-02 23:51:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:40,515 INFO L225 Difference]: With dead ends: 419 [2021-05-02 23:51:40,516 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 23:51:40,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1536.2ms TimeCoverageRelationStatistics Valid=102, Invalid=1704, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:51:40,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 23:51:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 287. [2021-05-02 23:51:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 279 states have (on average 1.1003584229390682) internal successors, (307), 280 states have internal predecessors, (307), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 314 transitions. [2021-05-02 23:51:40,718 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 314 transitions. Word has length 71 [2021-05-02 23:51:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:40,718 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 314 transitions. [2021-05-02 23:51:40,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 42 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 314 transitions. [2021-05-02 23:51:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:51:40,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:40,720 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:40,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2021-05-02 23:51:40,720 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:40,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1183204226, now seen corresponding path program 21 times [2021-05-02 23:51:40,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:40,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552194562] [2021-05-02 23:51:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:40,736 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1177 199999) (not (= v_~last~0_203 v_main_~c~0_1177))) InVars {main_~c~0=v_main_~c~0_1177, ~last~0=v_~last~0_203} OutVars{main_~c~0=v_main_~c~0_1177, ~last~0=v_~last~0_203} AuxVars[] AssignedVars[] [2021-05-02 23:51:40,740 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:40,774 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:40,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:40,809 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:40,823 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:40,865 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:40,925 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1179 199999) (= v_~last~0_204 v_main_~c~0_1179)) InVars {main_~c~0=v_main_~c~0_1179, ~last~0=v_~last~0_204} OutVars{main_~c~0=v_main_~c~0_1179, ~last~0=v_~last~0_204} AuxVars[] AssignedVars[] [2021-05-02 23:51:40,935 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:40,975 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:40,980 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:41,003 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:41,008 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:41,013 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:41,031 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:41,036 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1181 200000) (not (= v_~last~0_205 v_main_~c~0_1181))) InVars {main_~c~0=v_main_~c~0_1181, ~last~0=v_~last~0_205} OutVars{main_~c~0=v_main_~c~0_1181, ~last~0=v_~last~0_205} AuxVars[] AssignedVars[] [2021-05-02 23:51:41,044 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:41,079 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:41,085 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:41,114 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:41,130 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:41,172 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:41,233 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1183 200000) (= v_~last~0_206 v_main_~c~0_1183)) InVars {main_~c~0=v_main_~c~0_1183, ~last~0=v_~last~0_206} OutVars{main_~c~0=v_main_~c~0_1183, ~last~0=v_~last~0_206} AuxVars[] AssignedVars[] [2021-05-02 23:51:41,242 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:41,246 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:41,254 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:41,280 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:41,286 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:41,320 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:41,343 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:41,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:41,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:41,651 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-02 23:51:43,963 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:43,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552194562] [2021-05-02 23:51:43,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [552194562] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:43,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:43,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:51:43,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668230249] [2021-05-02 23:51:43,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:51:43,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:51:43,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:51:43,966 INFO L87 Difference]: Start difference. First operand 287 states and 314 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:46,029 INFO L93 Difference]: Finished difference Result 560 states and 605 transitions. [2021-05-02 23:51:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:51:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 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 71 [2021-05-02 23:51:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:46,034 INFO L225 Difference]: With dead ends: 560 [2021-05-02 23:51:46,034 INFO L226 Difference]: Without dead ends: 442 [2021-05-02 23:51:46,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 18 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2505.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:51:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-02 23:51:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 287. [2021-05-02 23:51:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 279 states have (on average 1.1003584229390682) internal successors, (307), 280 states have internal predecessors, (307), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 314 transitions. [2021-05-02 23:51:46,184 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 314 transitions. Word has length 71 [2021-05-02 23:51:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:46,185 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 314 transitions. [2021-05-02 23:51:46,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 314 transitions. [2021-05-02 23:51:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:51:46,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:46,186 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:46,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2021-05-02 23:51:46,186 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1738868222, now seen corresponding path program 22 times [2021-05-02 23:51:46,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:46,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481827931] [2021-05-02 23:51:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:46,202 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1206 199999) (not (= v_~last~0_207 v_main_~c~0_1206))) InVars {main_~c~0=v_main_~c~0_1206, ~last~0=v_~last~0_207} OutVars{main_~c~0=v_main_~c~0_1206, ~last~0=v_~last~0_207} AuxVars[] AssignedVars[] [2021-05-02 23:51:46,205 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:46,235 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:46,245 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:46,265 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:46,274 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:46,293 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:46,320 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_208 v_main_~c~0_1208) (< v_main_~c~0_1208 199999)) InVars {main_~c~0=v_main_~c~0_1208, ~last~0=v_~last~0_208} OutVars{main_~c~0=v_main_~c~0_1208, ~last~0=v_~last~0_208} AuxVars[] AssignedVars[] [2021-05-02 23:51:46,321 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:46,338 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:46,349 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:46,360 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:46,363 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:46,365 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:46,375 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:46,377 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_209 v_main_~c~0_1210)) (< v_main_~c~0_1210 200000)) InVars {main_~c~0=v_main_~c~0_1210, ~last~0=v_~last~0_209} OutVars{main_~c~0=v_main_~c~0_1210, ~last~0=v_~last~0_209} AuxVars[] AssignedVars[] [2021-05-02 23:51:46,378 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:46,379 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:46,388 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:46,405 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:46,412 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:46,443 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:46,469 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_210 v_main_~c~0_1212) (< v_main_~c~0_1212 200000)) InVars {main_~c~0=v_main_~c~0_1212, ~last~0=v_~last~0_210} OutVars{main_~c~0=v_main_~c~0_1212, ~last~0=v_~last~0_210} AuxVars[] AssignedVars[] [2021-05-02 23:51:46,472 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:46,489 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:46,491 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:46,504 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:46,507 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:46,509 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:46,518 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:46,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:46,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:48,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:48,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481827931] [2021-05-02 23:51:48,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481827931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:48,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:48,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:51:48,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233538295] [2021-05-02 23:51:48,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:51:48,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:48,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:51:48,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:51:48,007 INFO L87 Difference]: Start difference. First operand 287 states and 314 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:49,427 INFO L93 Difference]: Finished difference Result 555 states and 600 transitions. [2021-05-02 23:51:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:51:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 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 71 [2021-05-02 23:51:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:49,429 INFO L225 Difference]: With dead ends: 555 [2021-05-02 23:51:49,429 INFO L226 Difference]: Without dead ends: 437 [2021-05-02 23:51:49,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 15 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1575.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:51:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-02 23:51:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 287. [2021-05-02 23:51:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 279 states have (on average 1.1003584229390682) internal successors, (307), 280 states have internal predecessors, (307), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 314 transitions. [2021-05-02 23:51:49,544 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 314 transitions. Word has length 71 [2021-05-02 23:51:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:49,544 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 314 transitions. [2021-05-02 23:51:49,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 314 transitions. [2021-05-02 23:51:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:51:49,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:49,545 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:49,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2021-05-02 23:51:49,545 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:49,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:49,546 INFO L82 PathProgramCache]: Analyzing trace with hash -711368378, now seen corresponding path program 23 times [2021-05-02 23:51:49,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:49,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030785566] [2021-05-02 23:51:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:49,553 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1235 199999) (not (= v_~last~0_211 v_main_~c~0_1235))) InVars {main_~c~0=v_main_~c~0_1235, ~last~0=v_~last~0_211} OutVars{main_~c~0=v_main_~c~0_1235, ~last~0=v_~last~0_211} AuxVars[] AssignedVars[] [2021-05-02 23:51:49,558 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:49,573 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:49,575 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:49,587 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:49,594 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:49,613 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:49,642 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_212 v_main_~c~0_1237) (< v_main_~c~0_1237 199999)) InVars {main_~c~0=v_main_~c~0_1237, ~last~0=v_~last~0_212} OutVars{main_~c~0=v_main_~c~0_1237, ~last~0=v_~last~0_212} AuxVars[] AssignedVars[] [2021-05-02 23:51:49,655 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:49,680 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:49,683 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:49,696 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:49,699 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:49,702 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:49,718 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:49,720 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1239 200000) (not (= v_~last~0_213 v_main_~c~0_1239))) InVars {main_~c~0=v_main_~c~0_1239, ~last~0=v_~last~0_213} OutVars{main_~c~0=v_main_~c~0_1239, ~last~0=v_~last~0_213} AuxVars[] AssignedVars[] [2021-05-02 23:51:49,721 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:49,722 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:49,724 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:49,737 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:49,744 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:49,776 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:49,804 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_214 v_main_~c~0_1241) (< v_main_~c~0_1241 200000)) InVars {main_~c~0=v_main_~c~0_1241, ~last~0=v_~last~0_214} OutVars{main_~c~0=v_main_~c~0_1241, ~last~0=v_~last~0_214} AuxVars[] AssignedVars[] [2021-05-02 23:51:49,807 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:51:49,832 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:49,835 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:49,849 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:51:49,853 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:51:49,857 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:51:49,870 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:50,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:50,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:52,067 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:52,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030785566] [2021-05-02 23:51:52,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030785566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:52,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:52,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:51:52,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455845623] [2021-05-02 23:51:52,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:51:52,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:52,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:51:52,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1796, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:51:52,069 INFO L87 Difference]: Start difference. First operand 287 states and 314 transitions. Second operand has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 41 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:54,138 INFO L93 Difference]: Finished difference Result 540 states and 585 transitions. [2021-05-02 23:51:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:51:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 41 states have internal predecessors, (67), 2 states have call successors, (3), 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 71 [2021-05-02 23:51:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:54,141 INFO L225 Difference]: With dead ends: 540 [2021-05-02 23:51:54,141 INFO L226 Difference]: Without dead ends: 422 [2021-05-02 23:51:54,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 2615.0ms TimeCoverageRelationStatistics Valid=272, Invalid=3034, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:51:54,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-02 23:51:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 287. [2021-05-02 23:51:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 279 states have (on average 1.1003584229390682) internal successors, (307), 280 states have internal predecessors, (307), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:51:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 314 transitions. [2021-05-02 23:51:54,260 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 314 transitions. Word has length 71 [2021-05-02 23:51:54,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:54,261 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 314 transitions. [2021-05-02 23:51:54,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 41 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 314 transitions. [2021-05-02 23:51:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 23:51:54,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:54,262 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:54,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2021-05-02 23:51:54,262 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:54,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:54,262 INFO L82 PathProgramCache]: Analyzing trace with hash -845381884, now seen corresponding path program 19 times [2021-05-02 23:51:54,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:54,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713292605] [2021-05-02 23:51:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:54,267 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1264 199999) (not (= v_~last~0_215 v_main_~c~0_1264))) InVars {main_~c~0=v_main_~c~0_1264, ~last~0=v_~last~0_215} OutVars{main_~c~0=v_main_~c~0_1264, ~last~0=v_~last~0_215} AuxVars[] AssignedVars[] [2021-05-02 23:51:54,269 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:54,282 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:54,285 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:54,302 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:54,313 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:54,339 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:54,372 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:54,375 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1266 200000) (not (= v_~last~0_216 v_main_~c~0_1266))) InVars {main_~c~0=v_main_~c~0_1266, ~last~0=v_~last~0_216} OutVars{main_~c~0=v_main_~c~0_1266, ~last~0=v_~last~0_216} AuxVars[] AssignedVars[] [2021-05-02 23:51:54,377 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:51:54,378 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:54,381 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:54,399 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:51:54,409 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:51:54,443 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:51:54,468 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:51:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:54,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:57,356 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:51:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713292605] [2021-05-02 23:51:57,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713292605] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:51:57,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:51:57,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:51:57,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917390568] [2021-05-02 23:51:57,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:51:57,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:51:57,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:51:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2244, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:51:57,357 INFO L87 Difference]: Start difference. First operand 287 states and 314 transitions. Second operand has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 46 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:00,428 INFO L93 Difference]: Finished difference Result 533 states and 580 transitions. [2021-05-02 23:52:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:52:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 46 states have internal predecessors, (67), 2 states have call successors, (3), 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 71 [2021-05-02 23:52:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:00,430 INFO L225 Difference]: With dead ends: 533 [2021-05-02 23:52:00,430 INFO L226 Difference]: Without dead ends: 415 [2021-05-02 23:52:00,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 13 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 3865.1ms TimeCoverageRelationStatistics Valid=343, Invalid=4487, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:52:00,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-02 23:52:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 290. [2021-05-02 23:52:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 282 states have (on average 1.1028368794326242) internal successors, (311), 283 states have internal predecessors, (311), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:52:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 318 transitions. [2021-05-02 23:52:00,550 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 318 transitions. Word has length 71 [2021-05-02 23:52:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:00,550 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 318 transitions. [2021-05-02 23:52:00,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 46 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 318 transitions. [2021-05-02 23:52:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:52:00,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:00,551 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:00,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2021-05-02 23:52:00,552 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash 763923431, now seen corresponding path program 19 times [2021-05-02 23:52:00,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:00,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114307824] [2021-05-02 23:52:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:00,562 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1288 199999) (not (= v_~last~0_217 v_main_~c~0_1288))) InVars {main_~c~0=v_main_~c~0_1288, ~last~0=v_~last~0_217} OutVars{main_~c~0=v_main_~c~0_1288, ~last~0=v_~last~0_217} AuxVars[] AssignedVars[] [2021-05-02 23:52:00,564 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:00,579 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:00,581 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:00,595 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:00,603 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:00,623 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:00,657 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1290 199999) (= v_~last~0_218 v_main_~c~0_1290)) InVars {main_~c~0=v_main_~c~0_1290, ~last~0=v_~last~0_218} OutVars{main_~c~0=v_main_~c~0_1290, ~last~0=v_~last~0_218} AuxVars[] AssignedVars[] [2021-05-02 23:52:00,659 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:00,678 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:00,680 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:00,690 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:00,693 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:00,695 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:00,705 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:00,707 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_219 v_main_~c~0_1292)) (< v_main_~c~0_1292 200000)) InVars {main_~c~0=v_main_~c~0_1292, ~last~0=v_~last~0_219} OutVars{main_~c~0=v_main_~c~0_1292, ~last~0=v_~last~0_219} AuxVars[] AssignedVars[] [2021-05-02 23:52:00,708 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:00,709 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:00,712 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:00,732 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:00,741 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:00,780 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:00,835 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1294 200000) (= v_~last~0_220 v_main_~c~0_1294)) InVars {main_~c~0=v_main_~c~0_1294, ~last~0=v_~last~0_220} OutVars{main_~c~0=v_main_~c~0_1294, ~last~0=v_~last~0_220} AuxVars[] AssignedVars[] [2021-05-02 23:52:00,837 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:00,839 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:00,841 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:00,861 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:00,864 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:00,892 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:00,917 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:01,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:01,010 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 23:52:01,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:02,282 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:02,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114307824] [2021-05-02 23:52:02,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1114307824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:02,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:02,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:52:02,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686614744] [2021-05-02 23:52:02,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:52:02,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:52:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1873, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:52:02,284 INFO L87 Difference]: Start difference. First operand 290 states and 318 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 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 23:52:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:04,473 INFO L93 Difference]: Finished difference Result 428 states and 470 transitions. [2021-05-02 23:52:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:52:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 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 23:52:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:04,478 INFO L225 Difference]: With dead ends: 428 [2021-05-02 23:52:04,478 INFO L226 Difference]: Without dead ends: 310 [2021-05-02 23:52:04,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1235.1ms TimeCoverageRelationStatistics Valid=107, Invalid=1873, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:52:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-02 23:52:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 293. [2021-05-02 23:52:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 285 states have (on average 1.1017543859649124) internal successors, (314), 286 states have internal predecessors, (314), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:52:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 321 transitions. [2021-05-02 23:52:04,672 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 321 transitions. Word has length 74 [2021-05-02 23:52:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:04,672 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 321 transitions. [2021-05-02 23:52:04,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 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 23:52:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 321 transitions. [2021-05-02 23:52:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:52:04,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:04,674 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:04,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2021-05-02 23:52:04,674 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:04,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:04,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2117800417, now seen corresponding path program 24 times [2021-05-02 23:52:04,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:04,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895819223] [2021-05-02 23:52:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:04,689 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1318 199999) (not (= v_~last~0_221 v_main_~c~0_1318))) InVars {main_~c~0=v_main_~c~0_1318, ~last~0=v_~last~0_221} OutVars{main_~c~0=v_main_~c~0_1318, ~last~0=v_~last~0_221} AuxVars[] AssignedVars[] [2021-05-02 23:52:04,691 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:04,718 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:04,734 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:04,763 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:04,783 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:04,826 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:04,866 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1320 199999) (= v_~last~0_222 v_main_~c~0_1320)) InVars {main_~c~0=v_main_~c~0_1320, ~last~0=v_~last~0_222} OutVars{main_~c~0=v_main_~c~0_1320, ~last~0=v_~last~0_222} AuxVars[] AssignedVars[] [2021-05-02 23:52:04,868 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:04,871 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:04,876 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:04,896 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:04,901 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:04,929 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:04,947 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:04,950 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1322 200000) (not (= v_~last~0_223 v_main_~c~0_1322))) InVars {main_~c~0=v_main_~c~0_1322, ~last~0=v_~last~0_223} OutVars{main_~c~0=v_main_~c~0_1322, ~last~0=v_~last~0_223} AuxVars[] AssignedVars[] [2021-05-02 23:52:04,953 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:04,956 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:04,960 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:04,987 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:05,000 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:05,060 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:05,108 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1324 200000) (= v_~last~0_224 v_main_~c~0_1324)) InVars {main_~c~0=v_main_~c~0_1324, ~last~0=v_~last~0_224} OutVars{main_~c~0=v_main_~c~0_1324, ~last~0=v_~last~0_224} AuxVars[] AssignedVars[] [2021-05-02 23:52:05,111 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:05,114 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:05,118 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:05,141 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:05,145 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:05,171 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:05,187 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:05,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:05,387 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 23:52:05,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:07,709 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:07,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895819223] [2021-05-02 23:52:07,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [895819223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:07,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:07,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:52:07,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247631684] [2021-05-02 23:52:07,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:52:07,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:52:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:52:07,712 INFO L87 Difference]: Start difference. First operand 293 states and 321 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) 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 23:52:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:10,437 INFO L93 Difference]: Finished difference Result 573 states and 619 transitions. [2021-05-02 23:52:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:52:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) 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 23:52:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:10,442 INFO L225 Difference]: With dead ends: 573 [2021-05-02 23:52:10,443 INFO L226 Difference]: Without dead ends: 452 [2021-05-02 23:52:10,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 16 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2596.5ms TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:52:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-02 23:52:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 293. [2021-05-02 23:52:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 285 states have (on average 1.1017543859649124) internal successors, (314), 286 states have internal predecessors, (314), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:52:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 321 transitions. [2021-05-02 23:52:10,621 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 321 transitions. Word has length 74 [2021-05-02 23:52:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:10,621 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 321 transitions. [2021-05-02 23:52:10,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) 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 23:52:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 321 transitions. [2021-05-02 23:52:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:52:10,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:10,622 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:10,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2021-05-02 23:52:10,623 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash -804272031, now seen corresponding path program 25 times [2021-05-02 23:52:10,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:10,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791064103] [2021-05-02 23:52:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:10,635 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_225 v_main_~c~0_1348)) (< v_main_~c~0_1348 199999)) InVars {main_~c~0=v_main_~c~0_1348, ~last~0=v_~last~0_225} OutVars{main_~c~0=v_main_~c~0_1348, ~last~0=v_~last~0_225} AuxVars[] AssignedVars[] [2021-05-02 23:52:10,638 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:10,640 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:10,644 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:10,665 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:10,679 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:10,745 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:10,794 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_226 v_main_~c~0_1350) (< v_main_~c~0_1350 199999)) InVars {main_~c~0=v_main_~c~0_1350, ~last~0=v_~last~0_226} OutVars{main_~c~0=v_main_~c~0_1350, ~last~0=v_~last~0_226} AuxVars[] AssignedVars[] [2021-05-02 23:52:10,797 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:10,836 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:10,841 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:10,860 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:10,865 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:10,869 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:10,881 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:10,883 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1352 200000) (not (= v_~last~0_227 v_main_~c~0_1352))) InVars {main_~c~0=v_main_~c~0_1352, ~last~0=v_~last~0_227} OutVars{main_~c~0=v_main_~c~0_1352, ~last~0=v_~last~0_227} AuxVars[] AssignedVars[] [2021-05-02 23:52:10,884 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:10,898 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:10,900 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:10,919 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:10,929 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:10,954 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:10,994 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1354 200000) (= v_~last~0_228 v_main_~c~0_1354)) InVars {main_~c~0=v_main_~c~0_1354, ~last~0=v_~last~0_228} OutVars{main_~c~0=v_main_~c~0_1354, ~last~0=v_~last~0_228} AuxVars[] AssignedVars[] [2021-05-02 23:52:10,996 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:10,998 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:11,001 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:11,019 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:11,023 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:11,044 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:11,059 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:11,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:11,197 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 23:52:11,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:12,908 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:12,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791064103] [2021-05-02 23:52:12,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [791064103] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:12,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:12,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:52:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234990465] [2021-05-02 23:52:12,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:52:12,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:52:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:52:12,909 INFO L87 Difference]: Start difference. First operand 293 states and 321 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 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 23:52:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:14,767 INFO L93 Difference]: Finished difference Result 568 states and 614 transitions. [2021-05-02 23:52:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:52:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 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 23:52:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:14,770 INFO L225 Difference]: With dead ends: 568 [2021-05-02 23:52:14,770 INFO L226 Difference]: Without dead ends: 447 [2021-05-02 23:52:14,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1968.5ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:52:14,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-02 23:52:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 293. [2021-05-02 23:52:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 285 states have (on average 1.1017543859649124) internal successors, (314), 286 states have internal predecessors, (314), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:52:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 321 transitions. [2021-05-02 23:52:14,893 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 321 transitions. Word has length 74 [2021-05-02 23:52:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:14,893 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 321 transitions. [2021-05-02 23:52:14,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 36 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 23:52:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 321 transitions. [2021-05-02 23:52:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:52:14,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:14,894 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:14,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2021-05-02 23:52:14,894 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:14,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:14,895 INFO L82 PathProgramCache]: Analyzing trace with hash 223227813, now seen corresponding path program 26 times [2021-05-02 23:52:14,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:14,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168748367] [2021-05-02 23:52:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:14,903 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_229 v_main_~c~0_1378)) (< v_main_~c~0_1378 199999)) InVars {main_~c~0=v_main_~c~0_1378, ~last~0=v_~last~0_229} OutVars{main_~c~0=v_main_~c~0_1378, ~last~0=v_~last~0_229} AuxVars[] AssignedVars[] [2021-05-02 23:52:14,905 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:14,906 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:14,908 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:14,921 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:14,928 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:14,957 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:14,986 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1380 199999) (= v_~last~0_230 v_main_~c~0_1380)) InVars {main_~c~0=v_main_~c~0_1380, ~last~0=v_~last~0_230} OutVars{main_~c~0=v_main_~c~0_1380, ~last~0=v_~last~0_230} AuxVars[] AssignedVars[] [2021-05-02 23:52:14,988 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:15,007 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:15,010 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:15,023 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:15,026 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:15,029 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:15,040 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:15,042 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1382 200000) (not (= v_~last~0_231 v_main_~c~0_1382))) InVars {main_~c~0=v_main_~c~0_1382, ~last~0=v_~last~0_231} OutVars{main_~c~0=v_main_~c~0_1382, ~last~0=v_~last~0_231} AuxVars[] AssignedVars[] [2021-05-02 23:52:15,043 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:15,058 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:15,060 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:15,075 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:15,083 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:15,103 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:15,133 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_232 v_main_~c~0_1384) (< v_main_~c~0_1384 200000)) InVars {main_~c~0=v_main_~c~0_1384, ~last~0=v_~last~0_232} OutVars{main_~c~0=v_main_~c~0_1384, ~last~0=v_~last~0_232} AuxVars[] AssignedVars[] [2021-05-02 23:52:15,134 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:15,153 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:15,155 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:15,169 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:15,172 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:15,174 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:15,185 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:15,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:15,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:17,859 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:17,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168748367] [2021-05-02 23:52:17,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [168748367] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:17,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:17,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:52:17,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130973247] [2021-05-02 23:52:17,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:52:17,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:52:17,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:52:17,861 INFO L87 Difference]: Start difference. First operand 293 states and 321 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 43 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 23:52:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:23,123 INFO L93 Difference]: Finished difference Result 553 states and 599 transitions. [2021-05-02 23:52:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:52:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 43 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 23:52:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:23,127 INFO L225 Difference]: With dead ends: 553 [2021-05-02 23:52:23,128 INFO L226 Difference]: Without dead ends: 432 [2021-05-02 23:52:23,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 3996.8ms TimeCoverageRelationStatistics Valid=288, Invalid=3372, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:52:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-02 23:52:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 293. [2021-05-02 23:52:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 285 states have (on average 1.1017543859649124) internal successors, (314), 286 states have internal predecessors, (314), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:52:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 321 transitions. [2021-05-02 23:52:23,293 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 321 transitions. Word has length 74 [2021-05-02 23:52:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:23,293 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 321 transitions. [2021-05-02 23:52:23,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 43 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 23:52:23,293 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 321 transitions. [2021-05-02 23:52:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:52:23,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:23,294 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:23,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2021-05-02 23:52:23,294 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 89214307, now seen corresponding path program 20 times [2021-05-02 23:52:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:23,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144076950] [2021-05-02 23:52:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:23,302 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1408 199999) (not (= v_~last~0_233 v_main_~c~0_1408))) InVars {main_~c~0=v_main_~c~0_1408, ~last~0=v_~last~0_233} OutVars{main_~c~0=v_main_~c~0_1408, ~last~0=v_~last~0_233} AuxVars[] AssignedVars[] [2021-05-02 23:52:23,305 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:23,307 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:23,311 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:23,333 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:23,346 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:23,395 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:23,435 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:23,439 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_234 v_main_~c~0_1410)) (< v_main_~c~0_1410 200000)) InVars {main_~c~0=v_main_~c~0_1410, ~last~0=v_~last~0_234} OutVars{main_~c~0=v_main_~c~0_1410, ~last~0=v_~last~0_234} AuxVars[] AssignedVars[] [2021-05-02 23:52:23,442 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:23,443 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:23,447 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:23,471 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:23,485 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:23,548 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:23,591 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:23,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:23,823 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 23:52:29,260 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 23:52:29,264 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:29,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144076950] [2021-05-02 23:52:29,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144076950] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:29,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:29,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:52:29,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317497538] [2021-05-02 23:52:29,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:52:29,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:29,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:52:29,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2437, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:52:29,266 INFO L87 Difference]: Start difference. First operand 293 states and 321 transitions. Second operand has 50 states, 50 states have (on average 1.4) internal successors, (70), 48 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 23:52:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:34,786 INFO L93 Difference]: Finished difference Result 546 states and 594 transitions. [2021-05-02 23:52:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:52:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 48 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 23:52:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:34,790 INFO L225 Difference]: With dead ends: 546 [2021-05-02 23:52:34,790 INFO L226 Difference]: Without dead ends: 425 [2021-05-02 23:52:34,791 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 7392.9ms TimeCoverageRelationStatistics Valid=359, Invalid=4897, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:52:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-02 23:52:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 296. [2021-05-02 23:52:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 288 states have (on average 1.1041666666666667) internal successors, (318), 289 states have internal predecessors, (318), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:52:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 325 transitions. [2021-05-02 23:52:34,950 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 325 transitions. Word has length 74 [2021-05-02 23:52:34,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:34,950 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 325 transitions. [2021-05-02 23:52:34,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 48 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 23:52:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 325 transitions. [2021-05-02 23:52:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:52:34,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:34,952 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:34,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2021-05-02 23:52:34,953 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1717194790, now seen corresponding path program 3 times [2021-05-02 23:52:34,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:34,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998536267] [2021-05-02 23:52:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:34,976 INFO L181 rdanLoopAcceleration]: Guard: Formula: false InVars {} OutVars{} AuxVars[] AssignedVars[] [2021-05-02 23:52:34,979 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:35,012 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-02 23:52:35,033 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:52:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:35,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:35,147 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 23:52:35,960 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:35,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998536267] [2021-05-02 23:52:35,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [998536267] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:35,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:35,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:52:35,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999031689] [2021-05-02 23:52:35,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:52:35,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:52:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:52:35,962 INFO L87 Difference]: Start difference. First operand 296 states and 325 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:52:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:37,196 INFO L93 Difference]: Finished difference Result 497 states and 540 transitions. [2021-05-02 23:52:37,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:52:37,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 77 [2021-05-02 23:52:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:37,199 INFO L225 Difference]: With dead ends: 497 [2021-05-02 23:52:37,199 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 23:52:37,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 15 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 810.6ms TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:52:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 23:52:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 245. [2021-05-02 23:52:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 239 states have (on average 1.1213389121338913) internal successors, (268), 239 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:52:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 273 transitions. [2021-05-02 23:52:37,381 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 273 transitions. Word has length 77 [2021-05-02 23:52:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:37,381 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 273 transitions. [2021-05-02 23:52:37,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:52:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 273 transitions. [2021-05-02 23:52:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:52:37,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:37,382 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:37,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2021-05-02 23:52:37,382 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:37,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:37,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1193271708, now seen corresponding path program 20 times [2021-05-02 23:52:37,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:37,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593779877] [2021-05-02 23:52:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:37,392 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_236 v_main_~c~0_1467)) (< v_main_~c~0_1467 199999)) InVars {main_~c~0=v_main_~c~0_1467, ~last~0=v_~last~0_236} OutVars{main_~c~0=v_main_~c~0_1467, ~last~0=v_~last~0_236} AuxVars[] AssignedVars[] [2021-05-02 23:52:37,394 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:37,395 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:37,397 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:37,414 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:37,423 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:37,459 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:37,493 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1469 199999) (= v_~last~0_237 v_main_~c~0_1469)) InVars {main_~c~0=v_main_~c~0_1469, ~last~0=v_~last~0_237} OutVars{main_~c~0=v_main_~c~0_1469, ~last~0=v_~last~0_237} AuxVars[] AssignedVars[] [2021-05-02 23:52:37,495 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:37,496 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:37,498 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:37,512 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:37,515 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:37,532 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:37,543 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:37,545 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1471 200000) (not (= v_~last~0_238 v_main_~c~0_1471))) InVars {main_~c~0=v_main_~c~0_1471, ~last~0=v_~last~0_238} OutVars{main_~c~0=v_main_~c~0_1471, ~last~0=v_~last~0_238} AuxVars[] AssignedVars[] [2021-05-02 23:52:37,547 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:37,563 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:37,565 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:37,582 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:37,590 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:37,612 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:37,643 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_239 v_main_~c~0_1473) (< v_main_~c~0_1473 200000)) InVars {main_~c~0=v_main_~c~0_1473, ~last~0=v_~last~0_239} OutVars{main_~c~0=v_main_~c~0_1473, ~last~0=v_~last~0_239} AuxVars[] AssignedVars[] [2021-05-02 23:52:37,646 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:37,647 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:37,649 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:37,660 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:37,663 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:37,680 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:37,691 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:37,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:37,739 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 23:52:37,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:39,355 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:39,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593779877] [2021-05-02 23:52:39,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [593779877] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:39,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:39,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:52:39,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602494119] [2021-05-02 23:52:39,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:52:39,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:52:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2050, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:52:39,357 INFO L87 Difference]: Start difference. First operand 245 states and 273 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:41,968 INFO L93 Difference]: Finished difference Result 395 states and 438 transitions. [2021-05-02 23:52:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:52:41,970 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 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 77 [2021-05-02 23:52:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:41,971 INFO L225 Difference]: With dead ends: 395 [2021-05-02 23:52:41,971 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 23:52:41,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1571.2ms TimeCoverageRelationStatistics Valid=112, Invalid=2050, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:52:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 23:52:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 248. [2021-05-02 23:52:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.1198347107438016) internal successors, (271), 242 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:52:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 276 transitions. [2021-05-02 23:52:42,101 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 276 transitions. Word has length 77 [2021-05-02 23:52:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:42,101 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 276 transitions. [2021-05-02 23:52:42,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 276 transitions. [2021-05-02 23:52:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:52:42,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:42,102 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:42,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2021-05-02 23:52:42,102 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:42,103 INFO L82 PathProgramCache]: Analyzing trace with hash 399946530, now seen corresponding path program 27 times [2021-05-02 23:52:42,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:42,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262338813] [2021-05-02 23:52:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:42,111 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_240 v_main_~c~0_1498)) (< v_main_~c~0_1498 199999)) InVars {main_~c~0=v_main_~c~0_1498, ~last~0=v_~last~0_240} OutVars{main_~c~0=v_main_~c~0_1498, ~last~0=v_~last~0_240} AuxVars[] AssignedVars[] [2021-05-02 23:52:42,112 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:42,113 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:42,115 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:42,130 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:42,138 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:42,171 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:42,202 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1500 199999) (= v_~last~0_241 v_main_~c~0_1500)) InVars {main_~c~0=v_main_~c~0_1500, ~last~0=v_~last~0_241} OutVars{main_~c~0=v_main_~c~0_1500, ~last~0=v_~last~0_241} AuxVars[] AssignedVars[] [2021-05-02 23:52:42,204 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:42,224 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:42,227 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:42,240 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:42,243 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:42,246 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:42,257 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:42,259 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_242 v_main_~c~0_1502)) (< v_main_~c~0_1502 200000)) InVars {main_~c~0=v_main_~c~0_1502, ~last~0=v_~last~0_242} OutVars{main_~c~0=v_main_~c~0_1502, ~last~0=v_~last~0_242} AuxVars[] AssignedVars[] [2021-05-02 23:52:42,261 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:42,276 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:42,278 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:42,305 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:42,313 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:42,333 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:42,362 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_243 v_main_~c~0_1504) (< v_main_~c~0_1504 200000)) InVars {main_~c~0=v_main_~c~0_1504, ~last~0=v_~last~0_243} OutVars{main_~c~0=v_main_~c~0_1504, ~last~0=v_~last~0_243} AuxVars[] AssignedVars[] [2021-05-02 23:52:42,364 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:42,365 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:42,367 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:42,379 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:42,382 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:42,397 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:42,407 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:42,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:42,542 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 23:52:42,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:44,369 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:44,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262338813] [2021-05-02 23:52:44,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [262338813] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:44,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:44,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:52:44,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482341684] [2021-05-02 23:52:44,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:52:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:52:44,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:52:44,370 INFO L87 Difference]: Start difference. First operand 248 states and 276 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:46,285 INFO L93 Difference]: Finished difference Result 554 states and 602 transitions. [2021-05-02 23:52:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:52:46,286 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 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 77 [2021-05-02 23:52:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:46,288 INFO L225 Difference]: With dead ends: 554 [2021-05-02 23:52:46,288 INFO L226 Difference]: Without dead ends: 421 [2021-05-02 23:52:46,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2029.5ms TimeCoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:52:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-05-02 23:52:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 248. [2021-05-02 23:52:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.1198347107438016) internal successors, (271), 242 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:52:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 276 transitions. [2021-05-02 23:52:46,414 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 276 transitions. Word has length 77 [2021-05-02 23:52:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:46,414 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 276 transitions. [2021-05-02 23:52:46,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 276 transitions. [2021-05-02 23:52:46,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:52:46,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:46,415 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:46,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2021-05-02 23:52:46,415 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1772841378, now seen corresponding path program 28 times [2021-05-02 23:52:46,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:46,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822032885] [2021-05-02 23:52:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:46,426 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_244 v_main_~c~0_1529)) (< v_main_~c~0_1529 199999)) InVars {main_~c~0=v_main_~c~0_1529, ~last~0=v_~last~0_244} OutVars{main_~c~0=v_main_~c~0_1529, ~last~0=v_~last~0_244} AuxVars[] AssignedVars[] [2021-05-02 23:52:46,427 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:46,429 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:46,436 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:46,453 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:46,463 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:46,503 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:46,535 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1531 199999) (= v_~last~0_245 v_main_~c~0_1531)) InVars {main_~c~0=v_main_~c~0_1531, ~last~0=v_~last~0_245} OutVars{main_~c~0=v_main_~c~0_1531, ~last~0=v_~last~0_245} AuxVars[] AssignedVars[] [2021-05-02 23:52:46,537 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:46,539 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:46,541 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:46,552 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:46,555 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:46,575 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:46,586 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:46,589 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_246 v_main_~c~0_1533)) (< v_main_~c~0_1533 200000)) InVars {main_~c~0=v_main_~c~0_1533, ~last~0=v_~last~0_246} OutVars{main_~c~0=v_main_~c~0_1533, ~last~0=v_~last~0_246} AuxVars[] AssignedVars[] [2021-05-02 23:52:46,591 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:46,607 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:46,610 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:46,624 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:46,632 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:46,653 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:46,683 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1535 200000) (= v_~last~0_247 v_main_~c~0_1535)) InVars {main_~c~0=v_main_~c~0_1535, ~last~0=v_~last~0_247} OutVars{main_~c~0=v_main_~c~0_1535, ~last~0=v_~last~0_247} AuxVars[] AssignedVars[] [2021-05-02 23:52:46,685 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:46,705 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:46,707 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:46,732 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:46,735 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:46,738 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:46,748 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:46,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:46,875 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 23:52:46,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:46,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:48,745 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:48,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822032885] [2021-05-02 23:52:48,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [822032885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:48,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:48,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:52:48,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234755081] [2021-05-02 23:52:48,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:52:48,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:48,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:52:48,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:52:48,746 INFO L87 Difference]: Start difference. First operand 248 states and 276 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 38 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:51,499 INFO L93 Difference]: Finished difference Result 549 states and 597 transitions. [2021-05-02 23:52:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:52:51,502 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 38 states have internal predecessors, (73), 2 states have call successors, (3), 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 77 [2021-05-02 23:52:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:51,503 INFO L225 Difference]: With dead ends: 549 [2021-05-02 23:52:51,503 INFO L226 Difference]: Without dead ends: 416 [2021-05-02 23:52:51,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 16 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2208.2ms TimeCoverageRelationStatistics Valid=220, Invalid=2230, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:52:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-02 23:52:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 248. [2021-05-02 23:52:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.1198347107438016) internal successors, (271), 242 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:52:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 276 transitions. [2021-05-02 23:52:51,684 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 276 transitions. Word has length 77 [2021-05-02 23:52:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:51,684 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 276 transitions. [2021-05-02 23:52:51,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 38 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 276 transitions. [2021-05-02 23:52:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:52:51,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:51,685 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:51,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2021-05-02 23:52:51,685 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:51,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1494626074, now seen corresponding path program 29 times [2021-05-02 23:52:51,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:51,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803945359] [2021-05-02 23:52:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:51,703 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_248 v_main_~c~0_1560)) (< v_main_~c~0_1560 199999)) InVars {main_~c~0=v_main_~c~0_1560, ~last~0=v_~last~0_248} OutVars{main_~c~0=v_main_~c~0_1560, ~last~0=v_~last~0_248} AuxVars[] AssignedVars[] [2021-05-02 23:52:51,706 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:51,737 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:51,741 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:51,770 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:51,785 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:51,828 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:51,887 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1562 199999) (= v_~last~0_249 v_main_~c~0_1562)) InVars {main_~c~0=v_main_~c~0_1562, ~last~0=v_~last~0_249} OutVars{main_~c~0=v_main_~c~0_1562, ~last~0=v_~last~0_249} AuxVars[] AssignedVars[] [2021-05-02 23:52:51,890 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:51,928 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:51,933 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:51,956 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:51,961 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:51,966 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:51,981 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:51,986 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1564 200000) (not (= v_~last~0_250 v_main_~c~0_1564))) InVars {main_~c~0=v_main_~c~0_1564, ~last~0=v_~last~0_250} OutVars{main_~c~0=v_main_~c~0_1564, ~last~0=v_~last~0_250} AuxVars[] AssignedVars[] [2021-05-02 23:52:51,988 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:52:52,036 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:52,040 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:52,067 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:52:52,082 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:52:52,115 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:52:52,163 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1566 200000) (= v_~last~0_251 v_main_~c~0_1566)) InVars {main_~c~0=v_main_~c~0_1566, ~last~0=v_~last~0_251} OutVars{main_~c~0=v_main_~c~0_1566, ~last~0=v_~last~0_251} AuxVars[] AssignedVars[] [2021-05-02 23:52:52,166 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:52:52,200 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:52,203 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:52,222 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:52:52,227 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:52:52,231 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:52:52,249 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:52,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:52,436 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 23:52:52,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:56,827 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:56,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803945359] [2021-05-02 23:52:56,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803945359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:56,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:56,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:52:56,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3252659] [2021-05-02 23:52:56,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:52:56,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:56,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:52:56,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:52:56,833 INFO L87 Difference]: Start difference. First operand 248 states and 276 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:03,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:03,567 INFO L93 Difference]: Finished difference Result 534 states and 582 transitions. [2021-05-02 23:53:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:53:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 2 states have call successors, (3), 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 77 [2021-05-02 23:53:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:03,572 INFO L225 Difference]: With dead ends: 534 [2021-05-02 23:53:03,572 INFO L226 Difference]: Without dead ends: 401 [2021-05-02 23:53:03,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 5787.7ms TimeCoverageRelationStatistics Valid=303, Invalid=3729, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:53:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-02 23:53:03,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 248. [2021-05-02 23:53:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.1198347107438016) internal successors, (271), 242 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:53:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 276 transitions. [2021-05-02 23:53:03,809 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 276 transitions. Word has length 77 [2021-05-02 23:53:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:03,810 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 276 transitions. [2021-05-02 23:53:03,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 45 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 276 transitions. [2021-05-02 23:53:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 23:53:03,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:03,811 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:03,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2021-05-02 23:53:03,811 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:03,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1628639580, now seen corresponding path program 21 times [2021-05-02 23:53:03,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:03,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678809492] [2021-05-02 23:53:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:03,822 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1591 199999) (not (= v_~last~0_252 v_main_~c~0_1591))) InVars {main_~c~0=v_main_~c~0_1591, ~last~0=v_~last~0_252} OutVars{main_~c~0=v_main_~c~0_1591, ~last~0=v_~last~0_252} AuxVars[] AssignedVars[] [2021-05-02 23:53:03,825 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:03,854 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:03,859 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:03,887 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:03,901 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:03,943 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:03,998 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:04,003 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_253 v_main_~c~0_1593)) (< v_main_~c~0_1593 200000)) InVars {main_~c~0=v_main_~c~0_1593, ~last~0=v_~last~0_253} OutVars{main_~c~0=v_main_~c~0_1593, ~last~0=v_~last~0_253} AuxVars[] AssignedVars[] [2021-05-02 23:53:04,007 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:04,010 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:04,016 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:04,045 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:04,061 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:04,140 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:04,194 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:53:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:04,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:04,395 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 23:53:09,594 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-02 23:53:09,875 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 23:53:10,299 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 23:53:10,977 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 23:53:11,231 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 23:53:11,235 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:11,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678809492] [2021-05-02 23:53:11,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678809492] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:11,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:11,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:53:11,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031406303] [2021-05-02 23:53:11,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:53:11,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:11,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:53:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2638, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:53:11,237 INFO L87 Difference]: Start difference. First operand 248 states and 276 transitions. Second operand has 52 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 50 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:19,962 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 11 [2021-05-02 23:53:20,482 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 11 [2021-05-02 23:53:21,635 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2021-05-02 23:53:22,171 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 11 [2021-05-02 23:53:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:23,409 INFO L93 Difference]: Finished difference Result 527 states and 577 transitions. [2021-05-02 23:53:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:53:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 50 states have internal predecessors, (73), 2 states have call successors, (3), 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 77 [2021-05-02 23:53:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:23,414 INFO L225 Difference]: With dead ends: 527 [2021-05-02 23:53:23,414 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 23:53:23,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 9668.9ms TimeCoverageRelationStatistics Valid=375, Invalid=5325, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:53:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 23:53:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 251. [2021-05-02 23:53:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.1224489795918366) internal successors, (275), 245 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 23:53:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 280 transitions. [2021-05-02 23:53:23,601 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 280 transitions. Word has length 77 [2021-05-02 23:53:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:23,601 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 280 transitions. [2021-05-02 23:53:23,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 50 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:53:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 280 transitions. [2021-05-02 23:53:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:53:23,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:23,603 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:23,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313 [2021-05-02 23:53:23,603 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash 482352839, now seen corresponding path program 21 times [2021-05-02 23:53:23,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:23,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825916390] [2021-05-02 23:53:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:23,632 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_254 v_main_~c~0_1617)) (< v_main_~c~0_1617 199999)) InVars {main_~c~0=v_main_~c~0_1617, ~last~0=v_~last~0_254} OutVars{main_~c~0=v_main_~c~0_1617, ~last~0=v_~last~0_254} AuxVars[] AssignedVars[] [2021-05-02 23:53:23,636 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:23,670 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:23,673 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:23,703 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:23,720 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:23,760 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:23,823 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_255 v_main_~c~0_1619) (< v_main_~c~0_1619 199999)) InVars {main_~c~0=v_main_~c~0_1619, ~last~0=v_~last~0_255} OutVars{main_~c~0=v_main_~c~0_1619, ~last~0=v_~last~0_255} AuxVars[] AssignedVars[] [2021-05-02 23:53:23,828 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:53:23,876 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:23,880 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:23,905 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:23,910 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:23,916 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:53:23,933 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:23,937 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_256 v_main_~c~0_1621)) (< v_main_~c~0_1621 200000)) InVars {main_~c~0=v_main_~c~0_1621, ~last~0=v_~last~0_256} OutVars{main_~c~0=v_main_~c~0_1621, ~last~0=v_~last~0_256} AuxVars[] AssignedVars[] [2021-05-02 23:53:23,941 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:23,970 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:23,974 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:23,999 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:24,015 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:24,056 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:24,112 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1623 200000) (= v_~last~0_257 v_main_~c~0_1623)) InVars {main_~c~0=v_main_~c~0_1623, ~last~0=v_~last~0_257} OutVars{main_~c~0=v_main_~c~0_1623, ~last~0=v_~last~0_257} AuxVars[] AssignedVars[] [2021-05-02 23:53:24,116 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:53:24,118 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:24,122 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:24,142 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:24,148 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:24,178 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:53:24,195 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:24,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:53:24,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:24,595 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-05-02 23:53:30,208 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:30,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825916390] [2021-05-02 23:53:30,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [825916390] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:30,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:30,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:53:30,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436296927] [2021-05-02 23:53:30,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:53:30,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:30,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:53:30,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2851, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:53:30,211 INFO L87 Difference]: Start difference. First operand 251 states and 280 transitions. Second operand has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 52 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 23:53:33,938 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-02 23:53:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:35,014 INFO L93 Difference]: Finished difference Result 581 states and 632 transitions. [2021-05-02 23:53:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:53:35,017 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 52 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 23:53:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:35,019 INFO L225 Difference]: With dead ends: 581 [2021-05-02 23:53:35,019 INFO L226 Difference]: Without dead ends: 448 [2021-05-02 23:53:35,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 6052.6ms TimeCoverageRelationStatistics Valid=251, Invalid=3289, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:53:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-05-02 23:53:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 323. [2021-05-02 23:53:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 315 states have (on average 1.0984126984126985) internal successors, (346), 316 states have internal predecessors, (346), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:53:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 353 transitions. [2021-05-02 23:53:35,249 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 353 transitions. Word has length 80 [2021-05-02 23:53:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:35,250 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 353 transitions. [2021-05-02 23:53:35,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 52 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 23:53:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 353 transitions. [2021-05-02 23:53:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:53:35,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:35,251 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:35,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318 [2021-05-02 23:53:35,251 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:35,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1649869247, now seen corresponding path program 30 times [2021-05-02 23:53:35,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:35,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897175292] [2021-05-02 23:53:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:35,272 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1649 199999) (not (= v_~last~0_258 v_main_~c~0_1649))) InVars {main_~c~0=v_main_~c~0_1649, ~last~0=v_~last~0_258} OutVars{main_~c~0=v_main_~c~0_1649, ~last~0=v_~last~0_258} AuxVars[] AssignedVars[] [2021-05-02 23:53:35,275 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:35,278 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:35,282 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:35,314 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:35,331 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:35,408 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:35,461 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_259 v_main_~c~0_1651) (< v_main_~c~0_1651 199999)) InVars {main_~c~0=v_main_~c~0_1651, ~last~0=v_~last~0_259} OutVars{main_~c~0=v_main_~c~0_1651, ~last~0=v_~last~0_259} AuxVars[] AssignedVars[] [2021-05-02 23:53:35,465 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:53:35,468 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:35,473 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:35,498 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:35,502 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:35,528 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:53:35,549 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:35,555 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_260 v_main_~c~0_1653)) (< v_main_~c~0_1653 200000)) InVars {main_~c~0=v_main_~c~0_1653, ~last~0=v_~last~0_260} OutVars{main_~c~0=v_main_~c~0_1653, ~last~0=v_~last~0_260} AuxVars[] AssignedVars[] [2021-05-02 23:53:35,557 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:35,587 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:35,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:35,619 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:35,635 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:35,675 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:35,744 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1655 200000) (= v_~last~0_261 v_main_~c~0_1655)) InVars {main_~c~0=v_main_~c~0_1655, ~last~0=v_~last~0_261} OutVars{main_~c~0=v_main_~c~0_1655, ~last~0=v_~last~0_261} AuxVars[] AssignedVars[] [2021-05-02 23:53:35,748 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:53:35,750 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:35,755 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:35,779 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:35,784 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:35,817 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:53:35,840 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:36,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:36,151 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 23:53:36,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:36,309 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-05-02 23:53:40,150 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:40,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897175292] [2021-05-02 23:53:40,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [897175292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:40,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:40,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:53:40,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589425221] [2021-05-02 23:53:40,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:53:40,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:40,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:53:40,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:53:40,152 INFO L87 Difference]: Start difference. First operand 323 states and 353 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 38 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 23:53:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:45,544 INFO L93 Difference]: Finished difference Result 629 states and 679 transitions. [2021-05-02 23:53:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:53:45,547 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 38 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 23:53:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:45,549 INFO L225 Difference]: With dead ends: 629 [2021-05-02 23:53:45,549 INFO L226 Difference]: Without dead ends: 496 [2021-05-02 23:53:45,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 18 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 4765.8ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:53:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-05-02 23:53:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 323. [2021-05-02 23:53:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 315 states have (on average 1.0984126984126985) internal successors, (346), 316 states have internal predecessors, (346), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:53:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 353 transitions. [2021-05-02 23:53:45,802 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 353 transitions. Word has length 80 [2021-05-02 23:53:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:45,802 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 353 transitions. [2021-05-02 23:53:45,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 38 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 23:53:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 353 transitions. [2021-05-02 23:53:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:53:45,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:45,804 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:45,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323 [2021-05-02 23:53:45,804 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash -276974399, now seen corresponding path program 31 times [2021-05-02 23:53:45,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:45,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945554071] [2021-05-02 23:53:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:45,827 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1681 199999) (not (= v_~last~0_262 v_main_~c~0_1681))) InVars {main_~c~0=v_main_~c~0_1681, ~last~0=v_~last~0_262} OutVars{main_~c~0=v_main_~c~0_1681, ~last~0=v_~last~0_262} AuxVars[] AssignedVars[] [2021-05-02 23:53:45,830 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:45,862 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:45,867 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:45,896 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:45,913 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:45,954 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:46,011 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1683 199999) (= v_~last~0_263 v_main_~c~0_1683)) InVars {main_~c~0=v_main_~c~0_1683, ~last~0=v_~last~0_263} OutVars{main_~c~0=v_main_~c~0_1683, ~last~0=v_~last~0_263} AuxVars[] AssignedVars[] [2021-05-02 23:53:46,014 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:53:46,055 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:46,059 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:46,089 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:46,095 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:46,101 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:53:46,124 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:46,131 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_264 v_main_~c~0_1685)) (< v_main_~c~0_1685 200000)) InVars {main_~c~0=v_main_~c~0_1685, ~last~0=v_~last~0_264} OutVars{main_~c~0=v_main_~c~0_1685, ~last~0=v_~last~0_264} AuxVars[] AssignedVars[] [2021-05-02 23:53:46,135 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:46,169 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:46,174 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:46,205 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:46,222 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:46,262 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:46,319 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1687 200000) (= v_~last~0_265 v_main_~c~0_1687)) InVars {main_~c~0=v_main_~c~0_1687, ~last~0=v_~last~0_265} OutVars{main_~c~0=v_main_~c~0_1687, ~last~0=v_~last~0_265} AuxVars[] AssignedVars[] [2021-05-02 23:53:46,323 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:53:46,358 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:46,363 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:46,383 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:46,389 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:46,395 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:53:46,414 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:46,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:53:46,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:53:46,734 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-02 23:53:51,055 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:51,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945554071] [2021-05-02 23:53:51,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945554071] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:51,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:51,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:53:51,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60677932] [2021-05-02 23:53:51,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:53:51,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:51,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:53:51,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1716, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:53:51,058 INFO L87 Difference]: Start difference. First operand 323 states and 353 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 40 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 23:53:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:53:56,000 INFO L93 Difference]: Finished difference Result 624 states and 674 transitions. [2021-05-02 23:53:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:53:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 40 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 23:53:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:53:56,004 INFO L225 Difference]: With dead ends: 624 [2021-05-02 23:53:56,004 INFO L226 Difference]: Without dead ends: 491 [2021-05-02 23:53:56,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 18 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 5135.0ms TimeCoverageRelationStatistics Valid=236, Invalid=2520, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:53:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-05-02 23:53:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 323. [2021-05-02 23:53:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 315 states have (on average 1.0984126984126985) internal successors, (346), 316 states have internal predecessors, (346), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:53:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 353 transitions. [2021-05-02 23:53:56,266 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 353 transitions. Word has length 80 [2021-05-02 23:53:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:53:56,266 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 353 transitions. [2021-05-02 23:53:56,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 40 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 23:53:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 353 transitions. [2021-05-02 23:53:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:53:56,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:53:56,267 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:53:56,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328 [2021-05-02 23:53:56,268 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:53:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:53:56,268 INFO L82 PathProgramCache]: Analyzing trace with hash 750525445, now seen corresponding path program 32 times [2021-05-02 23:53:56,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:53:56,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361490960] [2021-05-02 23:53:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:53:56,287 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_266 v_main_~c~0_1713)) (< v_main_~c~0_1713 199999)) InVars {main_~c~0=v_main_~c~0_1713, ~last~0=v_~last~0_266} OutVars{main_~c~0=v_main_~c~0_1713, ~last~0=v_~last~0_266} AuxVars[] AssignedVars[] [2021-05-02 23:53:56,291 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:56,315 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:56,319 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:56,340 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:56,351 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:56,383 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:56,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_267 v_main_~c~0_1715) (< v_main_~c~0_1715 199999)) InVars {main_~c~0=v_main_~c~0_1715, ~last~0=v_~last~0_267} OutVars{main_~c~0=v_main_~c~0_1715, ~last~0=v_~last~0_267} AuxVars[] AssignedVars[] [2021-05-02 23:53:56,421 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:53:56,447 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:56,450 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:56,466 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:56,469 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:56,473 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:53:56,486 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:56,489 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1717 200000) (not (= v_~last~0_268 v_main_~c~0_1717))) InVars {main_~c~0=v_main_~c~0_1717, ~last~0=v_~last~0_268} OutVars{main_~c~0=v_main_~c~0_1717, ~last~0=v_~last~0_268} AuxVars[] AssignedVars[] [2021-05-02 23:53:56,492 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:53:56,515 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:56,517 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:56,536 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:53:56,547 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:53:56,573 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:53:56,610 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_269 v_main_~c~0_1719) (< v_main_~c~0_1719 200000)) InVars {main_~c~0=v_main_~c~0_1719, ~last~0=v_~last~0_269} OutVars{main_~c~0=v_main_~c~0_1719, ~last~0=v_~last~0_269} AuxVars[] AssignedVars[] [2021-05-02 23:53:56,614 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:53:56,615 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:56,618 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:53:56,631 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:53:56,635 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:53:56,654 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:53:56,667 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:53:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:56,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:53:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:53:56,843 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 23:53:56,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:01,102 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:01,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361490960] [2021-05-02 23:54:01,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361490960] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:01,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:01,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:54:01,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267725846] [2021-05-02 23:54:01,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:54:01,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:01,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:54:01,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2339, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:54:01,104 INFO L87 Difference]: Start difference. First operand 323 states and 353 transitions. Second operand has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 47 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 23:54:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:07,752 INFO L93 Difference]: Finished difference Result 609 states and 659 transitions. [2021-05-02 23:54:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:54:07,755 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 47 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 23:54:07,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:07,757 INFO L225 Difference]: With dead ends: 609 [2021-05-02 23:54:07,757 INFO L226 Difference]: Without dead ends: 476 [2021-05-02 23:54:07,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 5630.2ms TimeCoverageRelationStatistics Valid=320, Invalid=4102, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:54:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-05-02 23:54:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 323. [2021-05-02 23:54:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 315 states have (on average 1.0984126984126985) internal successors, (346), 316 states have internal predecessors, (346), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:54:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 353 transitions. [2021-05-02 23:54:07,981 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 353 transitions. Word has length 80 [2021-05-02 23:54:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:07,982 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 353 transitions. [2021-05-02 23:54:07,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 47 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 23:54:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 353 transitions. [2021-05-02 23:54:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:54:07,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:07,983 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:07,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333 [2021-05-02 23:54:07,983 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash 616511939, now seen corresponding path program 22 times [2021-05-02 23:54:07,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:07,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693772324] [2021-05-02 23:54:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:08,004 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_270 v_main_~c~0_1745)) (< v_main_~c~0_1745 199999)) InVars {main_~c~0=v_main_~c~0_1745, ~last~0=v_~last~0_270} OutVars{main_~c~0=v_main_~c~0_1745, ~last~0=v_~last~0_270} AuxVars[] AssignedVars[] [2021-05-02 23:54:08,007 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:08,010 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:08,014 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:08,047 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:08,064 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:08,119 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:08,157 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:08,164 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_271 v_main_~c~0_1747)) (< v_main_~c~0_1747 200000)) InVars {main_~c~0=v_main_~c~0_1747, ~last~0=v_~last~0_271} OutVars{main_~c~0=v_main_~c~0_1747, ~last~0=v_~last~0_271} AuxVars[] AssignedVars[] [2021-05-02 23:54:08,166 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:08,195 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:08,206 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:08,229 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:08,241 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:08,271 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:08,319 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:54:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:08,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:08,531 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 23:54:08,640 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 23:54:14,271 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:14,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693772324] [2021-05-02 23:54:14,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [693772324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:14,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:14,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:54:14,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294300358] [2021-05-02 23:54:14,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:54:14,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:14,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:54:14,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:54:14,273 INFO L87 Difference]: Start difference. First operand 323 states and 353 transitions. Second operand has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 52 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 23:54:21,950 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2021-05-02 23:54:22,464 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 11 [2021-05-02 23:54:23,000 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 11 [2021-05-02 23:54:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:23,350 INFO L93 Difference]: Finished difference Result 602 states and 654 transitions. [2021-05-02 23:54:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:54:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 52 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 23:54:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:23,354 INFO L225 Difference]: With dead ends: 602 [2021-05-02 23:54:23,354 INFO L226 Difference]: Without dead ends: 469 [2021-05-02 23:54:23,355 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 8051.6ms TimeCoverageRelationStatistics Valid=391, Invalid=5771, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:54:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-02 23:54:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 326. [2021-05-02 23:54:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 318 states have (on average 1.10062893081761) internal successors, (350), 319 states have internal predecessors, (350), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:54:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 357 transitions. [2021-05-02 23:54:23,578 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 357 transitions. Word has length 80 [2021-05-02 23:54:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:23,578 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 357 transitions. [2021-05-02 23:54:23,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 52 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 23:54:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 357 transitions. [2021-05-02 23:54:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:54:23,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:23,579 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:23,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336 [2021-05-02 23:54:23,579 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1391648892, now seen corresponding path program 22 times [2021-05-02 23:54:23,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:23,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159910438] [2021-05-02 23:54:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:23,593 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_272 v_main_~c~0_1772)) (< v_main_~c~0_1772 199999)) InVars {main_~c~0=v_main_~c~0_1772, ~last~0=v_~last~0_272} OutVars{main_~c~0=v_main_~c~0_1772, ~last~0=v_~last~0_272} AuxVars[] AssignedVars[] [2021-05-02 23:54:23,596 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:23,597 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:23,601 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:23,626 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:23,642 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:23,701 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:23,758 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1774 199999) (= v_~last~0_273 v_main_~c~0_1774)) InVars {main_~c~0=v_main_~c~0_1774, ~last~0=v_~last~0_273} OutVars{main_~c~0=v_main_~c~0_1774, ~last~0=v_~last~0_273} AuxVars[] AssignedVars[] [2021-05-02 23:54:23,762 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:23,800 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:23,805 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:23,830 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:23,835 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:23,839 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:23,861 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:23,866 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_274 v_main_~c~0_1776)) (< v_main_~c~0_1776 200000)) InVars {main_~c~0=v_main_~c~0_1776, ~last~0=v_~last~0_274} OutVars{main_~c~0=v_main_~c~0_1776, ~last~0=v_~last~0_274} AuxVars[] AssignedVars[] [2021-05-02 23:54:23,868 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:23,870 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:23,874 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:23,899 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:23,912 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:23,964 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:24,013 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1778 200000) (= v_~last~0_275 v_main_~c~0_1778)) InVars {main_~c~0=v_main_~c~0_1778, ~last~0=v_~last~0_275} OutVars{main_~c~0=v_main_~c~0_1778, ~last~0=v_~last~0_275} AuxVars[] AssignedVars[] [2021-05-02 23:54:24,016 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:24,017 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:24,020 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:24,041 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:24,046 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:24,070 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:24,089 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:24,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:24,170 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 23:54:24,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:27,510 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:27,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159910438] [2021-05-02 23:54:27,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [159910438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:27,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:27,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:54:27,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093525314] [2021-05-02 23:54:27,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:54:27,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:27,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:54:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2428, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:54:27,513 INFO L87 Difference]: Start difference. First operand 326 states and 357 transitions. Second operand has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 50 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:31,893 INFO L93 Difference]: Finished difference Result 486 states and 535 transitions. [2021-05-02 23:54:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:54:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 50 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2021-05-02 23:54:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:31,896 INFO L225 Difference]: With dead ends: 486 [2021-05-02 23:54:31,896 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 23:54:31,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 3252.6ms TimeCoverageRelationStatistics Valid=122, Invalid=2428, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:54:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 23:54:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 332. [2021-05-02 23:54:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 324 states have (on average 1.1018518518518519) internal successors, (357), 325 states have internal predecessors, (357), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:54:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 364 transitions. [2021-05-02 23:54:32,109 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 364 transitions. Word has length 83 [2021-05-02 23:54:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:32,109 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 364 transitions. [2021-05-02 23:54:32,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 50 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 364 transitions. [2021-05-02 23:54:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:54:32,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:32,110 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:32,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341 [2021-05-02 23:54:32,110 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:32,111 INFO L82 PathProgramCache]: Analyzing trace with hash 322813062, now seen corresponding path program 33 times [2021-05-02 23:54:32,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:32,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762106354] [2021-05-02 23:54:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:32,117 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_276 v_main_~c~0_1805)) (< v_main_~c~0_1805 199999)) InVars {main_~c~0=v_main_~c~0_1805, ~last~0=v_~last~0_276} OutVars{main_~c~0=v_main_~c~0_1805, ~last~0=v_~last~0_276} AuxVars[] AssignedVars[] [2021-05-02 23:54:32,119 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:32,120 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:32,122 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:32,137 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:32,144 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:32,176 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:32,205 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_277 v_main_~c~0_1807) (< v_main_~c~0_1807 199999)) InVars {main_~c~0=v_main_~c~0_1807, ~last~0=v_~last~0_277} OutVars{main_~c~0=v_main_~c~0_1807, ~last~0=v_~last~0_277} AuxVars[] AssignedVars[] [2021-05-02 23:54:32,207 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:32,223 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:32,225 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:32,239 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:32,241 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:32,243 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:32,253 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:32,255 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_278 v_main_~c~0_1809)) (< v_main_~c~0_1809 200000)) InVars {main_~c~0=v_main_~c~0_1809, ~last~0=v_~last~0_278} OutVars{main_~c~0=v_main_~c~0_1809, ~last~0=v_~last~0_278} AuxVars[] AssignedVars[] [2021-05-02 23:54:32,257 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:32,257 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:32,275 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:32,288 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:32,295 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:32,321 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:32,350 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_279 v_main_~c~0_1811) (< v_main_~c~0_1811 200000)) InVars {main_~c~0=v_main_~c~0_1811, ~last~0=v_~last~0_279} OutVars{main_~c~0=v_main_~c~0_1811, ~last~0=v_~last~0_279} AuxVars[] AssignedVars[] [2021-05-02 23:54:32,352 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:32,373 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:32,375 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:32,389 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:32,392 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:32,394 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:32,404 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:32,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:32,515 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 23:54:32,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:34,422 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:34,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762106354] [2021-05-02 23:54:34,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [762106354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:34,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:34,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:54:34,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371304337] [2021-05-02 23:54:34,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:54:34,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:34,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:54:34,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:54:34,424 INFO L87 Difference]: Start difference. First operand 332 states and 364 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 33 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:36,959 INFO L93 Difference]: Finished difference Result 666 states and 720 transitions. [2021-05-02 23:54:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:54:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 33 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2021-05-02 23:54:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:36,962 INFO L225 Difference]: With dead ends: 666 [2021-05-02 23:54:36,962 INFO L226 Difference]: Without dead ends: 527 [2021-05-02 23:54:36,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 28 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1890.4ms TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:54:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-05-02 23:54:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 397. [2021-05-02 23:54:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 389 states have (on average 1.0848329048843188) internal successors, (422), 390 states have internal predecessors, (422), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:54:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 429 transitions. [2021-05-02 23:54:37,241 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 429 transitions. Word has length 83 [2021-05-02 23:54:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:37,241 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 429 transitions. [2021-05-02 23:54:37,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 33 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 429 transitions. [2021-05-02 23:54:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:54:37,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:37,242 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:37,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346 [2021-05-02 23:54:37,242 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:37,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1866667326, now seen corresponding path program 34 times [2021-05-02 23:54:37,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:37,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186600278] [2021-05-02 23:54:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:37,249 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1838 199999) (not (= v_~last~0_280 v_main_~c~0_1838))) InVars {main_~c~0=v_main_~c~0_1838, ~last~0=v_~last~0_280} OutVars{main_~c~0=v_main_~c~0_1838, ~last~0=v_~last~0_280} AuxVars[] AssignedVars[] [2021-05-02 23:54:37,251 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:37,263 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:37,266 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:37,279 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:37,286 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:37,305 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:37,336 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1840 199999) (= v_~last~0_281 v_main_~c~0_1840)) InVars {main_~c~0=v_main_~c~0_1840, ~last~0=v_~last~0_281} OutVars{main_~c~0=v_main_~c~0_1840, ~last~0=v_~last~0_281} AuxVars[] AssignedVars[] [2021-05-02 23:54:37,338 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:37,340 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:37,342 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:37,356 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:37,359 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:37,375 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:37,386 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:37,387 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1842 200000) (not (= v_~last~0_282 v_main_~c~0_1842))) InVars {main_~c~0=v_main_~c~0_1842, ~last~0=v_~last~0_282} OutVars{main_~c~0=v_main_~c~0_1842, ~last~0=v_~last~0_282} AuxVars[] AssignedVars[] [2021-05-02 23:54:37,389 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:37,390 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:37,391 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:37,403 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:37,410 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:37,440 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:37,470 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1844 200000) (= v_~last~0_283 v_main_~c~0_1844)) InVars {main_~c~0=v_main_~c~0_1844, ~last~0=v_~last~0_283} OutVars{main_~c~0=v_main_~c~0_1844, ~last~0=v_~last~0_283} AuxVars[] AssignedVars[] [2021-05-02 23:54:37,472 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:37,473 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:37,474 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:37,485 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:37,488 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:37,502 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:37,513 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:37,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:37,646 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 23:54:37,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:41,093 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:41,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186600278] [2021-05-02 23:54:41,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [186600278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:41,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:41,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:54:41,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610081574] [2021-05-02 23:54:41,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:54:41,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:41,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:54:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:54:41,095 INFO L87 Difference]: Start difference. First operand 397 states and 429 transitions. Second operand has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:45,932 INFO L93 Difference]: Finished difference Result 715 states and 769 transitions. [2021-05-02 23:54:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:54:45,936 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2021-05-02 23:54:45,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:45,939 INFO L225 Difference]: With dead ends: 715 [2021-05-02 23:54:45,939 INFO L226 Difference]: Without dead ends: 576 [2021-05-02 23:54:45,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 19 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 3962.7ms TimeCoverageRelationStatistics Valid=228, Invalid=2424, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:54:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-05-02 23:54:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 397. [2021-05-02 23:54:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 389 states have (on average 1.0848329048843188) internal successors, (422), 390 states have internal predecessors, (422), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:54:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 429 transitions. [2021-05-02 23:54:46,249 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 429 transitions. Word has length 83 [2021-05-02 23:54:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:46,249 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 429 transitions. [2021-05-02 23:54:46,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 429 transitions. [2021-05-02 23:54:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:54:46,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:46,250 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:46,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351 [2021-05-02 23:54:46,250 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:46,250 INFO L82 PathProgramCache]: Analyzing trace with hash -493772478, now seen corresponding path program 35 times [2021-05-02 23:54:46,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:46,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796258335] [2021-05-02 23:54:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:46,263 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_284 v_main_~c~0_1871)) (< v_main_~c~0_1871 199999)) InVars {main_~c~0=v_main_~c~0_1871, ~last~0=v_~last~0_284} OutVars{main_~c~0=v_main_~c~0_1871, ~last~0=v_~last~0_284} AuxVars[] AssignedVars[] [2021-05-02 23:54:46,266 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:46,267 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,270 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,293 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:46,307 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:46,359 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:46,410 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_285 v_main_~c~0_1873) (< v_main_~c~0_1873 199999)) InVars {main_~c~0=v_main_~c~0_1873, ~last~0=v_~last~0_285} OutVars{main_~c~0=v_main_~c~0_1873, ~last~0=v_~last~0_285} AuxVars[] AssignedVars[] [2021-05-02 23:54:46,413 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:46,446 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,451 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,470 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:46,475 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:46,479 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:46,495 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:46,499 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_286 v_main_~c~0_1875)) (< v_main_~c~0_1875 200000)) InVars {main_~c~0=v_main_~c~0_1875, ~last~0=v_~last~0_286} OutVars{main_~c~0=v_main_~c~0_1875, ~last~0=v_~last~0_286} AuxVars[] AssignedVars[] [2021-05-02 23:54:46,502 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:46,535 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,540 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,569 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:46,588 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:46,636 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:46,723 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1877 200000) (= v_~last~0_287 v_main_~c~0_1877)) InVars {main_~c~0=v_main_~c~0_1877, ~last~0=v_~last~0_287} OutVars{main_~c~0=v_main_~c~0_1877, ~last~0=v_~last~0_287} AuxVars[] AssignedVars[] [2021-05-02 23:54:46,727 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:46,730 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,736 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:46,776 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:46,783 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:46,820 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:46,844 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:47,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:54:47,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:47,271 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-02 23:54:47,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:51,060 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:54:51,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796258335] [2021-05-02 23:54:51,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1796258335] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:54:51,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:54:51,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:54:51,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270713586] [2021-05-02 23:54:51,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:54:51,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:54:51,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:54:51,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1885, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:54:51,068 INFO L87 Difference]: Start difference. First operand 397 states and 429 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 42 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:54:55,881 INFO L93 Difference]: Finished difference Result 710 states and 764 transitions. [2021-05-02 23:54:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:54:55,884 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 42 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2021-05-02 23:54:55,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:54:55,887 INFO L225 Difference]: With dead ends: 710 [2021-05-02 23:54:55,887 INFO L226 Difference]: Without dead ends: 571 [2021-05-02 23:54:55,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 16 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 4674.2ms TimeCoverageRelationStatistics Valid=252, Invalid=2828, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:54:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-02 23:54:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 397. [2021-05-02 23:54:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 389 states have (on average 1.0848329048843188) internal successors, (422), 390 states have internal predecessors, (422), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:54:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 429 transitions. [2021-05-02 23:54:56,189 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 429 transitions. Word has length 83 [2021-05-02 23:54:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:54:56,189 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 429 transitions. [2021-05-02 23:54:56,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 42 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 429 transitions. [2021-05-02 23:54:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:54:56,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:54:56,191 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:54:56,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356 [2021-05-02 23:54:56,191 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:54:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:54:56,192 INFO L82 PathProgramCache]: Analyzing trace with hash 533727366, now seen corresponding path program 36 times [2021-05-02 23:54:56,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:54:56,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865637214] [2021-05-02 23:54:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:54:56,208 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1904 199999) (not (= v_~last~0_288 v_main_~c~0_1904))) InVars {main_~c~0=v_main_~c~0_1904, ~last~0=v_~last~0_288} OutVars{main_~c~0=v_main_~c~0_1904, ~last~0=v_~last~0_288} AuxVars[] AssignedVars[] [2021-05-02 23:54:56,212 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:56,252 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:56,256 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:56,288 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:56,308 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:56,360 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:56,447 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1906 199999) (= v_~last~0_289 v_main_~c~0_1906)) InVars {main_~c~0=v_main_~c~0_1906, ~last~0=v_~last~0_289} OutVars{main_~c~0=v_main_~c~0_1906, ~last~0=v_~last~0_289} AuxVars[] AssignedVars[] [2021-05-02 23:54:56,450 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:56,496 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:56,501 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:56,532 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:56,538 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:56,544 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:56,567 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:56,573 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1908 200000) (not (= v_~last~0_290 v_main_~c~0_1908))) InVars {main_~c~0=v_main_~c~0_1908, ~last~0=v_~last~0_290} OutVars{main_~c~0=v_main_~c~0_1908, ~last~0=v_~last~0_290} AuxVars[] AssignedVars[] [2021-05-02 23:54:56,576 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:54:56,579 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:56,584 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:56,618 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:54:56,639 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:54:56,725 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:54:56,807 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1910 200000) (= v_~last~0_291 v_main_~c~0_1910)) InVars {main_~c~0=v_main_~c~0_1910, ~last~0=v_~last~0_291} OutVars{main_~c~0=v_main_~c~0_1910, ~last~0=v_~last~0_291} AuxVars[] AssignedVars[] [2021-05-02 23:54:56,810 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:54:56,812 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:56,816 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:54:56,839 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:54:56,847 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:54:56,884 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:54:56,911 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:54:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:57,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:54:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:54:57,189 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 23:54:57,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:54:57,366 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-02 23:54:57,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:03,420 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:55:03,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865637214] [2021-05-02 23:55:03,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1865637214] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:55:03,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:55:03,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:55:03,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502517053] [2021-05-02 23:55:03,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:55:03,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:55:03,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:55:03,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2536, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:55:03,423 INFO L87 Difference]: Start difference. First operand 397 states and 429 transitions. Second operand has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:55:13,419 INFO L93 Difference]: Finished difference Result 695 states and 749 transitions. [2021-05-02 23:55:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:55:13,424 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2021-05-02 23:55:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:55:13,426 INFO L225 Difference]: With dead ends: 695 [2021-05-02 23:55:13,427 INFO L226 Difference]: Without dead ends: 556 [2021-05-02 23:55:13,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 18 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 8048.8ms TimeCoverageRelationStatistics Valid=336, Invalid=4494, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:55:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-05-02 23:55:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 397. [2021-05-02 23:55:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 389 states have (on average 1.0848329048843188) internal successors, (422), 390 states have internal predecessors, (422), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:55:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 429 transitions. [2021-05-02 23:55:13,737 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 429 transitions. Word has length 83 [2021-05-02 23:55:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:55:13,737 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 429 transitions. [2021-05-02 23:55:13,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 49 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 429 transitions. [2021-05-02 23:55:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 23:55:13,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:55:13,739 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:55:13,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361 [2021-05-02 23:55:13,739 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:55:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:55:13,740 INFO L82 PathProgramCache]: Analyzing trace with hash 399713860, now seen corresponding path program 23 times [2021-05-02 23:55:13,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:55:13,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126756625] [2021-05-02 23:55:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:55:13,749 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1937 199999) (not (= v_~last~0_292 v_main_~c~0_1937))) InVars {main_~c~0=v_main_~c~0_1937, ~last~0=v_~last~0_292} OutVars{main_~c~0=v_main_~c~0_1937, ~last~0=v_~last~0_292} AuxVars[] AssignedVars[] [2021-05-02 23:55:13,752 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:55:13,787 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:13,791 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:13,825 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:55:13,842 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:55:13,883 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:55:13,945 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:13,950 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1939 200000) (not (= v_~last~0_293 v_main_~c~0_1939))) InVars {main_~c~0=v_main_~c~0_1939, ~last~0=v_~last~0_293} OutVars{main_~c~0=v_main_~c~0_1939, ~last~0=v_~last~0_293} AuxVars[] AssignedVars[] [2021-05-02 23:55:13,953 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:55:13,956 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:13,960 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:13,989 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:55:14,012 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:55:14,096 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:55:14,164 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:55:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:14,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:55:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:14,396 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 23:55:14,513 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 23:55:18,795 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-02 23:55:20,820 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 23:55:21,092 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-02 23:55:21,510 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-02 23:55:22,393 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-02 23:55:22,924 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:55:22,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126756625] [2021-05-02 23:55:22,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [126756625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:55:22,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:55:22,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:55:22,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949294816] [2021-05-02 23:55:22,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:55:22,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:55:22,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:55:22,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:55:22,925 INFO L87 Difference]: Start difference. First operand 397 states and 429 transitions. Second operand has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 54 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:32,087 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 11 [2021-05-02 23:55:32,691 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 11 [2021-05-02 23:55:33,270 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 11 [2021-05-02 23:55:33,943 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2021-05-02 23:55:34,590 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 11 [2021-05-02 23:55:35,365 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 11 [2021-05-02 23:55:36,085 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 11 [2021-05-02 23:55:36,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:55:36,510 INFO L93 Difference]: Finished difference Result 688 states and 744 transitions. [2021-05-02 23:55:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:55:36,513 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 54 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2021-05-02 23:55:36,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:55:36,515 INFO L225 Difference]: With dead ends: 688 [2021-05-02 23:55:36,516 INFO L226 Difference]: Without dead ends: 549 [2021-05-02 23:55:36,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 11729.5ms TimeCoverageRelationStatistics Valid=407, Invalid=6235, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:55:36,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-02 23:55:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 400. [2021-05-02 23:55:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 392 states have (on average 1.086734693877551) internal successors, (426), 393 states have internal predecessors, (426), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:55:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2021-05-02 23:55:36,846 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 83 [2021-05-02 23:55:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:55:36,847 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2021-05-02 23:55:36,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 54 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2021-05-02 23:55:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:55:36,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:55:36,848 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:55:36,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364 [2021-05-02 23:55:36,849 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:55:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:55:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash 502663591, now seen corresponding path program 23 times [2021-05-02 23:55:36,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:55:36,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301076763] [2021-05-02 23:55:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:55:36,866 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_294 v_main_~c~0_1965)) (< v_main_~c~0_1965 199999)) InVars {main_~c~0=v_main_~c~0_1965, ~last~0=v_~last~0_294} OutVars{main_~c~0=v_main_~c~0_1965, ~last~0=v_~last~0_294} AuxVars[] AssignedVars[] [2021-05-02 23:55:36,868 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:55:36,903 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:36,907 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:36,936 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:55:36,956 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:55:37,005 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:55:37,081 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1967 199999) (= v_~last~0_295 v_main_~c~0_1967)) InVars {main_~c~0=v_main_~c~0_1967, ~last~0=v_~last~0_295} OutVars{main_~c~0=v_main_~c~0_1967, ~last~0=v_~last~0_295} AuxVars[] AssignedVars[] [2021-05-02 23:55:37,084 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:55:37,087 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:37,095 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:37,124 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:55:37,131 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:55:37,163 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:55:37,186 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:55:37,191 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_296 v_main_~c~0_1969)) (< v_main_~c~0_1969 200000)) InVars {main_~c~0=v_main_~c~0_1969, ~last~0=v_~last~0_296} OutVars{main_~c~0=v_main_~c~0_1969, ~last~0=v_~last~0_296} AuxVars[] AssignedVars[] [2021-05-02 23:55:37,194 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:55:37,223 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:37,228 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:37,259 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:55:37,278 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:55:37,322 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:55:37,398 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_297 v_main_~c~0_1971) (< v_main_~c~0_1971 200000)) InVars {main_~c~0=v_main_~c~0_1971, ~last~0=v_~last~0_297} OutVars{main_~c~0=v_main_~c~0_1971, ~last~0=v_~last~0_297} AuxVars[] AssignedVars[] [2021-05-02 23:55:37,402 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:55:37,445 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:37,451 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:37,476 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:55:37,482 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:55:37,488 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:55:37,516 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:55:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:37,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:55:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:37,626 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 23:55:37,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:41,764 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:55:41,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301076763] [2021-05-02 23:55:41,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301076763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:55:41,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:55:41,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:55:41,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172503070] [2021-05-02 23:55:41,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:55:41,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:55:41,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:55:41,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:55:41,766 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 52 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 23:55:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:55:50,677 INFO L93 Difference]: Finished difference Result 563 states and 613 transitions. [2021-05-02 23:55:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:55:50,682 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 52 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 23:55:50,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:55:50,683 INFO L225 Difference]: With dead ends: 563 [2021-05-02 23:55:50,683 INFO L226 Difference]: Without dead ends: 424 [2021-05-02 23:55:50,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 4020.6ms TimeCoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:55:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-02 23:55:51,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 403. [2021-05-02 23:55:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 395 states have (on average 1.0860759493670886) internal successors, (429), 396 states have internal predecessors, (429), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:55:51,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 436 transitions. [2021-05-02 23:55:51,009 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 436 transitions. Word has length 86 [2021-05-02 23:55:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:55:51,010 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 436 transitions. [2021-05-02 23:55:51,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 52 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 23:55:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 436 transitions. [2021-05-02 23:55:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:55:51,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:55:51,011 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:55:51,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369 [2021-05-02 23:55:51,011 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:55:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:55:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1322054757, now seen corresponding path program 37 times [2021-05-02 23:55:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:55:51,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874832970] [2021-05-02 23:55:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:55:51,028 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_1999 199999) (not (= v_~last~0_298 v_main_~c~0_1999))) InVars {main_~c~0=v_main_~c~0_1999, ~last~0=v_~last~0_298} OutVars{main_~c~0=v_main_~c~0_1999, ~last~0=v_~last~0_298} AuxVars[] AssignedVars[] [2021-05-02 23:55:51,032 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:55:51,070 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:51,074 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:51,111 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:55:51,129 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:55:51,179 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:55:51,251 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2001 199999) (= v_~last~0_299 v_main_~c~0_2001)) InVars {main_~c~0=v_main_~c~0_2001, ~last~0=v_~last~0_299} OutVars{main_~c~0=v_main_~c~0_2001, ~last~0=v_~last~0_299} AuxVars[] AssignedVars[] [2021-05-02 23:55:51,255 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:55:51,257 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:51,263 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:51,293 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:55:51,300 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:55:51,333 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:55:51,360 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:55:51,366 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2003 200000) (not (= v_~last~0_300 v_main_~c~0_2003))) InVars {main_~c~0=v_main_~c~0_2003, ~last~0=v_~last~0_300} OutVars{main_~c~0=v_main_~c~0_2003, ~last~0=v_~last~0_300} AuxVars[] AssignedVars[] [2021-05-02 23:55:51,369 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:55:51,372 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:51,376 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:51,408 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:55:51,427 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:55:51,510 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:55:51,601 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_301 v_main_~c~0_2005) (< v_main_~c~0_2005 200000)) InVars {main_~c~0=v_main_~c~0_2005, ~last~0=v_~last~0_301} OutVars{main_~c~0=v_main_~c~0_2005, ~last~0=v_~last~0_301} AuxVars[] AssignedVars[] [2021-05-02 23:55:51,605 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:55:51,607 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:51,613 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:51,642 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:55:51,650 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:55:51,690 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:55:51,720 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:55:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:51,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:55:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:52,001 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 23:55:52,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:52,154 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-02 23:55:56,344 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:55:56,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874832970] [2021-05-02 23:55:56,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874832970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:55:56,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:55:56,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:55:56,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895226574] [2021-05-02 23:55:56,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:55:56,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:55:56,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:55:56,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:55:56,346 INFO L87 Difference]: Start difference. First operand 403 states and 436 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 35 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 23:56:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:56:01,122 INFO L93 Difference]: Finished difference Result 743 states and 798 transitions. [2021-05-02 23:56:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:56:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 35 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 23:56:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:56:01,127 INFO L225 Difference]: With dead ends: 743 [2021-05-02 23:56:01,127 INFO L226 Difference]: Without dead ends: 601 [2021-05-02 23:56:01,128 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 26 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 4417.2ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:56:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-05-02 23:56:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 403. [2021-05-02 23:56:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 395 states have (on average 1.0860759493670886) internal successors, (429), 396 states have internal predecessors, (429), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:56:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 436 transitions. [2021-05-02 23:56:01,447 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 436 transitions. Word has length 86 [2021-05-02 23:56:01,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:56:01,447 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 436 transitions. [2021-05-02 23:56:01,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 35 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 23:56:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 436 transitions. [2021-05-02 23:56:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:56:01,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:56:01,449 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:56:01,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374 [2021-05-02 23:56:01,449 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:56:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:56:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash -867425631, now seen corresponding path program 38 times [2021-05-02 23:56:01,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:56:01,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051540528] [2021-05-02 23:56:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:56:01,475 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2033 199999) (not (= v_~last~0_302 v_main_~c~0_2033))) InVars {main_~c~0=v_main_~c~0_2033, ~last~0=v_~last~0_302} OutVars{main_~c~0=v_main_~c~0_2033, ~last~0=v_~last~0_302} AuxVars[] AssignedVars[] [2021-05-02 23:56:01,478 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:01,514 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:01,520 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:01,557 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:01,577 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:01,627 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:01,709 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2035 199999) (= v_~last~0_303 v_main_~c~0_2035)) InVars {main_~c~0=v_main_~c~0_2035, ~last~0=v_~last~0_303} OutVars{main_~c~0=v_main_~c~0_2035, ~last~0=v_~last~0_303} AuxVars[] AssignedVars[] [2021-05-02 23:56:01,713 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:56:01,757 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:01,762 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:01,789 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:56:01,796 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:56:01,801 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:56:01,830 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:56:01,834 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2037 200000) (not (= v_~last~0_304 v_main_~c~0_2037))) InVars {main_~c~0=v_main_~c~0_2037, ~last~0=v_~last~0_304} OutVars{main_~c~0=v_main_~c~0_2037, ~last~0=v_~last~0_304} AuxVars[] AssignedVars[] [2021-05-02 23:56:01,838 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:01,872 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:01,877 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:01,913 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:01,934 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:01,984 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:02,069 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2039 200000) (= v_~last~0_305 v_main_~c~0_2039)) InVars {main_~c~0=v_main_~c~0_2039, ~last~0=v_~last~0_305} OutVars{main_~c~0=v_main_~c~0_2039, ~last~0=v_~last~0_305} AuxVars[] AssignedVars[] [2021-05-02 23:56:02,072 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:56:02,074 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:02,078 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:02,104 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:56:02,111 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:56:02,146 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:56:02,173 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:56:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:02,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:56:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:02,430 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 23:56:02,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:56:02,570 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-02 23:56:07,411 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:07,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051540528] [2021-05-02 23:56:07,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1051540528] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:07,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:07,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:56:07,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849759090] [2021-05-02 23:56:07,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:56:07,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:07,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:56:07,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1886, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:56:07,413 INFO L87 Difference]: Start difference. First operand 403 states and 436 transitions. Second operand has 44 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 42 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 23:56:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:56:12,644 INFO L93 Difference]: Finished difference Result 728 states and 783 transitions. [2021-05-02 23:56:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:56:12,647 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 42 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 23:56:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:56:12,649 INFO L225 Difference]: With dead ends: 728 [2021-05-02 23:56:12,649 INFO L226 Difference]: Without dead ends: 586 [2021-05-02 23:56:12,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 22 SyntacticMatches, 20 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5594.7ms TimeCoverageRelationStatistics Valid=244, Invalid=2726, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:56:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-05-02 23:56:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 403. [2021-05-02 23:56:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 395 states have (on average 1.0860759493670886) internal successors, (429), 396 states have internal predecessors, (429), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:56:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 436 transitions. [2021-05-02 23:56:12,945 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 436 transitions. Word has length 86 [2021-05-02 23:56:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:56:12,946 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 436 transitions. [2021-05-02 23:56:12,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 42 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 23:56:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 436 transitions. [2021-05-02 23:56:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:56:12,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:56:12,947 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:56:12,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379 [2021-05-02 23:56:12,947 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:56:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:56:12,947 INFO L82 PathProgramCache]: Analyzing trace with hash 505469217, now seen corresponding path program 39 times [2021-05-02 23:56:12,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:56:12,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012449267] [2021-05-02 23:56:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:56:12,956 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2067 199999) (not (= v_~last~0_306 v_main_~c~0_2067))) InVars {main_~c~0=v_main_~c~0_2067, ~last~0=v_~last~0_306} OutVars{main_~c~0=v_main_~c~0_2067, ~last~0=v_~last~0_306} AuxVars[] AssignedVars[] [2021-05-02 23:56:12,958 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:12,978 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:12,981 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:13,000 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:13,011 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:13,035 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:13,074 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_307 v_main_~c~0_2069) (< v_main_~c~0_2069 199999)) InVars {main_~c~0=v_main_~c~0_2069, ~last~0=v_~last~0_307} OutVars{main_~c~0=v_main_~c~0_2069, ~last~0=v_~last~0_307} AuxVars[] AssignedVars[] [2021-05-02 23:56:13,076 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:56:13,100 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:13,102 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:13,119 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:56:13,123 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:56:13,127 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:56:13,143 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:56:13,146 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2071 200000) (not (= v_~last~0_308 v_main_~c~0_2071))) InVars {main_~c~0=v_main_~c~0_2071, ~last~0=v_~last~0_308} OutVars{main_~c~0=v_main_~c~0_2071, ~last~0=v_~last~0_308} AuxVars[] AssignedVars[] [2021-05-02 23:56:13,148 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:13,149 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:13,156 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:13,174 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:13,184 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:13,226 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:13,268 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2073 200000) (= v_~last~0_309 v_main_~c~0_2073)) InVars {main_~c~0=v_main_~c~0_2073, ~last~0=v_~last~0_309} OutVars{main_~c~0=v_main_~c~0_2073, ~last~0=v_~last~0_309} AuxVars[] AssignedVars[] [2021-05-02 23:56:13,270 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:56:13,293 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:13,297 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:13,315 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:56:13,319 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:56:13,322 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:56:13,335 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:56:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:13,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:56:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:13,467 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 23:56:13,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:56:16,732 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012449267] [2021-05-02 23:56:16,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012449267] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:16,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:16,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:56:16,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850557281] [2021-05-02 23:56:16,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:56:16,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:16,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:56:16,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2062, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:56:16,734 INFO L87 Difference]: Start difference. First operand 403 states and 436 transitions. Second operand has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 44 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 23:56:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:56:20,789 INFO L93 Difference]: Finished difference Result 723 states and 778 transitions. [2021-05-02 23:56:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:56:20,792 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 44 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 23:56:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:56:20,794 INFO L225 Difference]: With dead ends: 723 [2021-05-02 23:56:20,794 INFO L226 Difference]: Without dead ends: 581 [2021-05-02 23:56:20,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 3874.7ms TimeCoverageRelationStatistics Valid=268, Invalid=3154, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:56:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-05-02 23:56:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 403. [2021-05-02 23:56:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 395 states have (on average 1.0860759493670886) internal successors, (429), 396 states have internal predecessors, (429), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:56:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 436 transitions. [2021-05-02 23:56:21,084 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 436 transitions. Word has length 86 [2021-05-02 23:56:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:56:21,084 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 436 transitions. [2021-05-02 23:56:21,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 44 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 23:56:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 436 transitions. [2021-05-02 23:56:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:56:21,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:56:21,085 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:56:21,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384 [2021-05-02 23:56:21,085 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:56:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:56:21,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1532969061, now seen corresponding path program 40 times [2021-05-02 23:56:21,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:56:21,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023201838] [2021-05-02 23:56:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:56:21,099 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2101 199999) (not (= v_~last~0_310 v_main_~c~0_2101))) InVars {main_~c~0=v_main_~c~0_2101, ~last~0=v_~last~0_310} OutVars{main_~c~0=v_main_~c~0_2101, ~last~0=v_~last~0_310} AuxVars[] AssignedVars[] [2021-05-02 23:56:21,105 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:21,106 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:21,108 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:21,125 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:21,136 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:21,177 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:21,221 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2103 199999) (= v_~last~0_311 v_main_~c~0_2103)) InVars {main_~c~0=v_main_~c~0_2103, ~last~0=v_~last~0_311} OutVars{main_~c~0=v_main_~c~0_2103, ~last~0=v_~last~0_311} AuxVars[] AssignedVars[] [2021-05-02 23:56:21,224 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:56:21,238 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:21,241 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:21,257 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:56:21,261 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:56:21,281 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:56:21,295 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:56:21,298 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_312 v_main_~c~0_2105)) (< v_main_~c~0_2105 200000)) InVars {main_~c~0=v_main_~c~0_2105, ~last~0=v_~last~0_312} OutVars{main_~c~0=v_main_~c~0_2105, ~last~0=v_~last~0_312} AuxVars[] AssignedVars[] [2021-05-02 23:56:21,299 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:21,300 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:21,303 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:21,319 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:21,328 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:21,370 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:21,417 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_313 v_main_~c~0_2107) (< v_main_~c~0_2107 200000)) InVars {main_~c~0=v_main_~c~0_2107, ~last~0=v_~last~0_313} OutVars{main_~c~0=v_main_~c~0_2107, ~last~0=v_~last~0_313} AuxVars[] AssignedVars[] [2021-05-02 23:56:21,419 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:56:21,421 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:21,423 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:21,438 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:56:21,441 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:56:21,459 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:56:21,473 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:56:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:21,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:56:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:56:21,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:56:26,370 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:26,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023201838] [2021-05-02 23:56:26,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023201838] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:26,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:26,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:56:26,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683143058] [2021-05-02 23:56:26,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:56:26,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:26,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:56:26,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2742, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:56:26,372 INFO L87 Difference]: Start difference. First operand 403 states and 436 transitions. Second operand has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 51 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 23:56:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:56:33,025 INFO L93 Difference]: Finished difference Result 708 states and 763 transitions. [2021-05-02 23:56:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:56:33,028 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 51 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 23:56:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:56:33,029 INFO L225 Difference]: With dead ends: 708 [2021-05-02 23:56:33,029 INFO L226 Difference]: Without dead ends: 566 [2021-05-02 23:56:33,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 19 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 6074.3ms TimeCoverageRelationStatistics Valid=351, Invalid=4905, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:56:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-05-02 23:56:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 403. [2021-05-02 23:56:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 395 states have (on average 1.0860759493670886) internal successors, (429), 396 states have internal predecessors, (429), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:56:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 436 transitions. [2021-05-02 23:56:33,319 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 436 transitions. Word has length 86 [2021-05-02 23:56:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:56:33,319 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 436 transitions. [2021-05-02 23:56:33,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 51 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 23:56:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 436 transitions. [2021-05-02 23:56:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:56:33,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:56:33,320 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:56:33,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable389 [2021-05-02 23:56:33,320 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:56:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:56:33,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1398955555, now seen corresponding path program 24 times [2021-05-02 23:56:33,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:56:33,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154134276] [2021-05-02 23:56:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:56:33,331 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_314 v_main_~c~0_2135)) (< v_main_~c~0_2135 199999)) InVars {main_~c~0=v_main_~c~0_2135, ~last~0=v_~last~0_314} OutVars{main_~c~0=v_main_~c~0_2135, ~last~0=v_~last~0_314} AuxVars[] AssignedVars[] [2021-05-02 23:56:33,333 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:33,353 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:33,356 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:33,378 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:33,389 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:33,416 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:33,466 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:56:33,470 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2137 200000) (not (= v_~last~0_315 v_main_~c~0_2137))) InVars {main_~c~0=v_main_~c~0_2137, ~last~0=v_~last~0_315} OutVars{main_~c~0=v_main_~c~0_2137, ~last~0=v_~last~0_315} AuxVars[] AssignedVars[] [2021-05-02 23:56:33,473 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:33,495 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:33,499 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:33,518 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:33,529 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:33,558 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:33,603 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:56:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:33,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:56:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:33,760 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 23:56:38,677 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 23:56:39,732 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:39,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154134276] [2021-05-02 23:56:39,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154134276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:39,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:39,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:56:39,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036650351] [2021-05-02 23:56:39,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:56:39,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:39,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:56:39,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=3289, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:56:39,734 INFO L87 Difference]: Start difference. First operand 403 states and 436 transitions. Second operand has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 56 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 23:56:49,495 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 11 [2021-05-02 23:56:50,531 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 11 [2021-05-02 23:56:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:56:51,290 INFO L93 Difference]: Finished difference Result 701 states and 758 transitions. [2021-05-02 23:56:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:56:51,293 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 56 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 23:56:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:56:51,295 INFO L225 Difference]: With dead ends: 701 [2021-05-02 23:56:51,295 INFO L226 Difference]: Without dead ends: 559 [2021-05-02 23:56:51,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 8601.9ms TimeCoverageRelationStatistics Valid=423, Invalid=6717, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:56:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-05-02 23:56:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 406. [2021-05-02 23:56:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 398 states have (on average 1.0879396984924623) internal successors, (433), 399 states have internal predecessors, (433), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:56:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 440 transitions. [2021-05-02 23:56:51,581 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 440 transitions. Word has length 86 [2021-05-02 23:56:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:56:51,581 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 440 transitions. [2021-05-02 23:56:51,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 56 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 23:56:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 440 transitions. [2021-05-02 23:56:51,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:56:51,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:56:51,582 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:56:51,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392 [2021-05-02 23:56:51,582 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:56:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:56:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1904424796, now seen corresponding path program 24 times [2021-05-02 23:56:51,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:56:51,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758003328] [2021-05-02 23:56:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:56:51,595 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_316 v_main_~c~0_2164)) (< v_main_~c~0_2164 199999)) InVars {main_~c~0=v_main_~c~0_2164, ~last~0=v_~last~0_316} OutVars{main_~c~0=v_main_~c~0_2164, ~last~0=v_~last~0_316} AuxVars[] AssignedVars[] [2021-05-02 23:56:51,597 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:51,621 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:51,624 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:51,644 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:51,657 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:51,689 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:51,742 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2166 199999) (= v_~last~0_317 v_main_~c~0_2166)) InVars {main_~c~0=v_main_~c~0_2166, ~last~0=v_~last~0_317} OutVars{main_~c~0=v_main_~c~0_2166, ~last~0=v_~last~0_317} AuxVars[] AssignedVars[] [2021-05-02 23:56:51,744 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:56:51,746 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:51,748 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:51,779 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:56:51,784 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:56:51,808 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:56:51,830 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:56:51,835 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2168 200000) (not (= v_~last~0_318 v_main_~c~0_2168))) InVars {main_~c~0=v_main_~c~0_2168, ~last~0=v_~last~0_318} OutVars{main_~c~0=v_main_~c~0_2168, ~last~0=v_~last~0_318} AuxVars[] AssignedVars[] [2021-05-02 23:56:51,837 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:56:51,859 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:51,862 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:51,882 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:56:51,894 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:56:51,932 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:56:51,990 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2170 200000) (= v_~last~0_319 v_main_~c~0_2170)) InVars {main_~c~0=v_main_~c~0_2170, ~last~0=v_~last~0_319} OutVars{main_~c~0=v_main_~c~0_2170, ~last~0=v_~last~0_319} AuxVars[] AssignedVars[] [2021-05-02 23:56:51,993 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:56:52,038 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:52,041 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:56:52,067 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:56:52,072 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:56:52,076 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:56:52,098 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:56:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:52,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:56:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:56:52,172 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 23:56:52,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:56:55,122 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:55,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758003328] [2021-05-02 23:56:55,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [758003328] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:55,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:55,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:56:55,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670483240] [2021-05-02 23:56:55,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:56:55,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:55,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:56:55,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2838, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:56:55,124 INFO L87 Difference]: Start difference. First operand 406 states and 440 transitions. Second operand has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 54 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:01,536 INFO L93 Difference]: Finished difference Result 572 states and 623 transitions. [2021-05-02 23:57:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:57:01,538 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 54 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2021-05-02 23:57:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:01,540 INFO L225 Difference]: With dead ends: 572 [2021-05-02 23:57:01,540 INFO L226 Difference]: Without dead ends: 430 [2021-05-02 23:57:01,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2844.7ms TimeCoverageRelationStatistics Valid=132, Invalid=2838, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:57:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-02 23:57:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 409. [2021-05-02 23:57:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 401 states have (on average 1.087281795511222) internal successors, (436), 402 states have internal predecessors, (436), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:57:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 443 transitions. [2021-05-02 23:57:01,832 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 443 transitions. Word has length 89 [2021-05-02 23:57:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:01,832 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 443 transitions. [2021-05-02 23:57:01,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 54 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:01,832 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 443 transitions. [2021-05-02 23:57:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:57:01,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:01,833 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:01,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397 [2021-05-02 23:57:01,833 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1313061926, now seen corresponding path program 41 times [2021-05-02 23:57:01,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:01,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132677949] [2021-05-02 23:57:01,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:01,842 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_320 v_main_~c~0_2199)) (< v_main_~c~0_2199 199999)) InVars {main_~c~0=v_main_~c~0_2199, ~last~0=v_~last~0_320} OutVars{main_~c~0=v_main_~c~0_2199, ~last~0=v_~last~0_320} AuxVars[] AssignedVars[] [2021-05-02 23:57:01,845 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:01,866 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:01,868 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:01,886 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:01,898 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:01,926 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:01,977 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2201 199999) (= v_~last~0_321 v_main_~c~0_2201)) InVars {main_~c~0=v_main_~c~0_2201, ~last~0=v_~last~0_321} OutVars{main_~c~0=v_main_~c~0_2201, ~last~0=v_~last~0_321} AuxVars[] AssignedVars[] [2021-05-02 23:57:01,979 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:57:02,004 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:02,006 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:02,024 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:57:02,028 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:57:02,032 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:57:02,051 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:02,054 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2203 200000) (not (= v_~last~0_322 v_main_~c~0_2203))) InVars {main_~c~0=v_main_~c~0_2203, ~last~0=v_~last~0_322} OutVars{main_~c~0=v_main_~c~0_2203, ~last~0=v_~last~0_322} AuxVars[] AssignedVars[] [2021-05-02 23:57:02,056 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:02,078 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:02,081 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:02,100 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:02,113 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:02,143 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:02,203 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2205 200000) (= v_~last~0_323 v_main_~c~0_2205)) InVars {main_~c~0=v_main_~c~0_2205, ~last~0=v_~last~0_323} OutVars{main_~c~0=v_main_~c~0_2205, ~last~0=v_~last~0_323} AuxVars[] AssignedVars[] [2021-05-02 23:57:02,207 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:57:02,208 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:02,211 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:02,235 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:57:02,239 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:57:02,262 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:57:02,278 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:02,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:02,471 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 23:57:02,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:02,588 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-05-02 23:57:05,957 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:57:05,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132677949] [2021-05-02 23:57:05,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [132677949] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:57:05,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:57:05,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:57:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440535384] [2021-05-02 23:57:05,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:57:05,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:57:05,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:57:05,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:57:05,959 INFO L87 Difference]: Start difference. First operand 409 states and 443 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:10,316 INFO L93 Difference]: Finished difference Result 756 states and 812 transitions. [2021-05-02 23:57:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:57:10,319 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2021-05-02 23:57:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:10,321 INFO L225 Difference]: With dead ends: 756 [2021-05-02 23:57:10,321 INFO L226 Difference]: Without dead ends: 611 [2021-05-02 23:57:10,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 30 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 3579.3ms TimeCoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:57:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-05-02 23:57:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 409. [2021-05-02 23:57:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 401 states have (on average 1.087281795511222) internal successors, (436), 402 states have internal predecessors, (436), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:57:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 443 transitions. [2021-05-02 23:57:10,627 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 443 transitions. Word has length 89 [2021-05-02 23:57:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:10,627 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 443 transitions. [2021-05-02 23:57:10,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 37 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 443 transitions. [2021-05-02 23:57:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:57:10,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:10,628 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:10,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402 [2021-05-02 23:57:10,628 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash -876418462, now seen corresponding path program 42 times [2021-05-02 23:57:10,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:10,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711251603] [2021-05-02 23:57:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:10,643 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_324 v_main_~c~0_2234)) (< v_main_~c~0_2234 199999)) InVars {main_~c~0=v_main_~c~0_2234, ~last~0=v_~last~0_324} OutVars{main_~c~0=v_main_~c~0_2234, ~last~0=v_~last~0_324} AuxVars[] AssignedVars[] [2021-05-02 23:57:10,647 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:10,649 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:10,651 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:10,674 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:10,686 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:10,735 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:10,790 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_325 v_main_~c~0_2236) (< v_main_~c~0_2236 199999)) InVars {main_~c~0=v_main_~c~0_2236, ~last~0=v_~last~0_325} OutVars{main_~c~0=v_main_~c~0_2236, ~last~0=v_~last~0_325} AuxVars[] AssignedVars[] [2021-05-02 23:57:10,792 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:57:10,793 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:10,796 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:10,813 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:57:10,817 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:57:10,840 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:57:10,858 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:10,861 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2238 200000) (not (= v_~last~0_326 v_main_~c~0_2238))) InVars {main_~c~0=v_main_~c~0_2238, ~last~0=v_~last~0_326} OutVars{main_~c~0=v_main_~c~0_2238, ~last~0=v_~last~0_326} AuxVars[] AssignedVars[] [2021-05-02 23:57:10,863 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:10,864 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:10,867 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:10,887 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:10,898 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:10,952 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:11,004 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_327 v_main_~c~0_2240) (< v_main_~c~0_2240 200000)) InVars {main_~c~0=v_main_~c~0_2240, ~last~0=v_~last~0_327} OutVars{main_~c~0=v_main_~c~0_2240, ~last~0=v_~last~0_327} AuxVars[] AssignedVars[] [2021-05-02 23:57:11,006 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:57:11,008 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:11,010 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:11,031 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:57:11,035 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:57:11,058 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:57:11,076 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:11,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:11,275 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 23:57:11,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:11,393 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-02 23:57:17,190 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:57:17,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711251603] [2021-05-02 23:57:17,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [711251603] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:57:17,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:57:17,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:57:17,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802466295] [2021-05-02 23:57:17,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:57:17,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:57:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:57:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2063, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:57:17,192 INFO L87 Difference]: Start difference. First operand 409 states and 443 transitions. Second operand has 46 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 44 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:27,770 INFO L93 Difference]: Finished difference Result 741 states and 797 transitions. [2021-05-02 23:57:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:57:27,773 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 44 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2021-05-02 23:57:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:27,776 INFO L225 Difference]: With dead ends: 741 [2021-05-02 23:57:27,776 INFO L226 Difference]: Without dead ends: 596 [2021-05-02 23:57:27,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 21 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 6975.9ms TimeCoverageRelationStatistics Valid=260, Invalid=3046, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:57:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-05-02 23:57:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 409. [2021-05-02 23:57:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 401 states have (on average 1.087281795511222) internal successors, (436), 402 states have internal predecessors, (436), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:57:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 443 transitions. [2021-05-02 23:57:28,134 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 443 transitions. Word has length 89 [2021-05-02 23:57:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:28,134 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 443 transitions. [2021-05-02 23:57:28,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 44 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 443 transitions. [2021-05-02 23:57:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:57:28,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:28,135 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:28,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407 [2021-05-02 23:57:28,135 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:28,136 INFO L82 PathProgramCache]: Analyzing trace with hash 496476386, now seen corresponding path program 43 times [2021-05-02 23:57:28,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:28,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559911043] [2021-05-02 23:57:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:28,149 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2269 199999) (not (= v_~last~0_328 v_main_~c~0_2269))) InVars {main_~c~0=v_main_~c~0_2269, ~last~0=v_~last~0_328} OutVars{main_~c~0=v_main_~c~0_2269, ~last~0=v_~last~0_328} AuxVars[] AssignedVars[] [2021-05-02 23:57:28,152 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:28,154 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,158 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,192 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:28,205 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:28,300 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:28,401 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:57:28,412 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_329 v_main_~c~0_2271) (< v_main_~c~0_2271 199999)) InVars {main_~c~0=v_main_~c~0_2271, ~last~0=v_~last~0_329} OutVars{main_~c~0=v_main_~c~0_2271, ~last~0=v_~last~0_329} AuxVars[] AssignedVars[] [2021-05-02 23:57:28,415 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:57:28,458 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,460 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,489 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:57:28,500 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:57:28,507 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:57:28,541 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:28,547 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2273 200000) (not (= v_~last~0_330 v_main_~c~0_2273))) InVars {main_~c~0=v_main_~c~0_2273, ~last~0=v_~last~0_330} OutVars{main_~c~0=v_main_~c~0_2273, ~last~0=v_~last~0_330} AuxVars[] AssignedVars[] [2021-05-02 23:57:28,550 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:28,586 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,590 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,623 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:28,653 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:28,721 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:28,796 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_331 v_main_~c~0_2275) (< v_main_~c~0_2275 200000)) InVars {main_~c~0=v_main_~c~0_2275, ~last~0=v_~last~0_331} OutVars{main_~c~0=v_main_~c~0_2275, ~last~0=v_~last~0_331} AuxVars[] AssignedVars[] [2021-05-02 23:57:28,798 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:57:28,799 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,802 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,823 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:57:28,828 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:57:28,851 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:57:28,869 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:29,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:29,023 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 23:57:29,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:33,003 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:57:33,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559911043] [2021-05-02 23:57:33,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559911043] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:57:33,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:57:33,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:57:33,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742359222] [2021-05-02 23:57:33,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:57:33,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:57:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:57:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2247, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:57:33,004 INFO L87 Difference]: Start difference. First operand 409 states and 443 transitions. Second operand has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:37,932 INFO L93 Difference]: Finished difference Result 736 states and 792 transitions. [2021-05-02 23:57:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:57:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2021-05-02 23:57:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:37,937 INFO L225 Difference]: With dead ends: 736 [2021-05-02 23:57:37,937 INFO L226 Difference]: Without dead ends: 591 [2021-05-02 23:57:37,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 21 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 4838.1ms TimeCoverageRelationStatistics Valid=284, Invalid=3498, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:57:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-02 23:57:38,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 409. [2021-05-02 23:57:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 401 states have (on average 1.087281795511222) internal successors, (436), 402 states have internal predecessors, (436), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:57:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 443 transitions. [2021-05-02 23:57:38,240 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 443 transitions. Word has length 89 [2021-05-02 23:57:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:38,240 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 443 transitions. [2021-05-02 23:57:38,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 443 transitions. [2021-05-02 23:57:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:57:38,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:38,241 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:38,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412 [2021-05-02 23:57:38,241 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:38,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:38,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1523976230, now seen corresponding path program 44 times [2021-05-02 23:57:38,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:38,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617918237] [2021-05-02 23:57:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:38,250 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2304 199999) (not (= v_~last~0_332 v_main_~c~0_2304))) InVars {main_~c~0=v_main_~c~0_2304, ~last~0=v_~last~0_332} OutVars{main_~c~0=v_main_~c~0_2304, ~last~0=v_~last~0_332} AuxVars[] AssignedVars[] [2021-05-02 23:57:38,252 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:38,254 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:38,256 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:38,276 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:38,287 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:38,335 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:38,386 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_333 v_main_~c~0_2306) (< v_main_~c~0_2306 199999)) InVars {main_~c~0=v_main_~c~0_2306, ~last~0=v_~last~0_333} OutVars{main_~c~0=v_main_~c~0_2306, ~last~0=v_~last~0_333} AuxVars[] AssignedVars[] [2021-05-02 23:57:38,388 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:57:38,413 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:38,416 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:38,433 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:57:38,438 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:57:38,443 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:57:38,463 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:38,466 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_334 v_main_~c~0_2308)) (< v_main_~c~0_2308 200000)) InVars {main_~c~0=v_main_~c~0_2308, ~last~0=v_~last~0_334} OutVars{main_~c~0=v_main_~c~0_2308, ~last~0=v_~last~0_334} AuxVars[] AssignedVars[] [2021-05-02 23:57:38,468 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:38,469 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:38,472 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:38,491 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:38,503 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:38,558 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:38,619 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_335 v_main_~c~0_2310) (< v_main_~c~0_2310 200000)) InVars {main_~c~0=v_main_~c~0_2310, ~last~0=v_~last~0_335} OutVars{main_~c~0=v_main_~c~0_2310, ~last~0=v_~last~0_335} AuxVars[] AssignedVars[] [2021-05-02 23:57:38,622 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:57:38,651 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:38,655 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:38,671 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:57:38,676 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:57:38,681 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:57:38,699 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:38,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:38,931 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 23:57:38,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:39,047 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-05-02 23:57:44,398 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:57:44,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617918237] [2021-05-02 23:57:44,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617918237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:57:44,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:57:44,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:57:44,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698896247] [2021-05-02 23:57:44,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:57:44,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:57:44,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:57:44,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2955, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:57:44,400 INFO L87 Difference]: Start difference. First operand 409 states and 443 transitions. Second operand has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 53 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:52,691 INFO L93 Difference]: Finished difference Result 721 states and 777 transitions. [2021-05-02 23:57:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:57:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 53 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2021-05-02 23:57:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:52,695 INFO L225 Difference]: With dead ends: 721 [2021-05-02 23:57:52,695 INFO L226 Difference]: Without dead ends: 576 [2021-05-02 23:57:52,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 7131.5ms TimeCoverageRelationStatistics Valid=367, Invalid=5333, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:57:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-05-02 23:57:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 409. [2021-05-02 23:57:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 401 states have (on average 1.087281795511222) internal successors, (436), 402 states have internal predecessors, (436), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:57:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 443 transitions. [2021-05-02 23:57:52,995 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 443 transitions. Word has length 89 [2021-05-02 23:57:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:52,995 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 443 transitions. [2021-05-02 23:57:52,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 53 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 443 transitions. [2021-05-02 23:57:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 23:57:52,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:52,996 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:52,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417 [2021-05-02 23:57:52,996 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:52,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1389962724, now seen corresponding path program 25 times [2021-05-02 23:57:52,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:52,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015682887] [2021-05-02 23:57:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:53,002 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_336 v_main_~c~0_2339)) (< v_main_~c~0_2339 199999)) InVars {main_~c~0=v_main_~c~0_2339, ~last~0=v_~last~0_336} OutVars{main_~c~0=v_main_~c~0_2339, ~last~0=v_~last~0_336} AuxVars[] AssignedVars[] [2021-05-02 23:57:53,003 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:53,004 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:53,006 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:53,024 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:53,034 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:53,080 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:53,124 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:57:53,126 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2341 200000) (not (= v_~last~0_337 v_main_~c~0_2341))) InVars {main_~c~0=v_main_~c~0_2341, ~last~0=v_~last~0_337} OutVars{main_~c~0=v_main_~c~0_2341, ~last~0=v_~last~0_337} AuxVars[] AssignedVars[] [2021-05-02 23:57:53,128 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:57:53,147 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:53,149 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:53,166 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:57:53,177 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:57:53,206 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:57:53,249 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:57:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:53,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:53,395 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 23:57:59,200 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-02 23:57:59,582 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-02 23:57:59,773 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:57:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015682887] [2021-05-02 23:57:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2015682887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:57:59,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:57:59,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:57:59,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354680051] [2021-05-02 23:57:59,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:57:59,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:57:59,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:57:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3522, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:57:59,775 INFO L87 Difference]: Start difference. First operand 409 states and 443 transitions. Second operand has 60 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:58:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:10,826 INFO L93 Difference]: Finished difference Result 714 states and 772 transitions. [2021-05-02 23:58:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:58:10,828 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2021-05-02 23:58:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:10,831 INFO L225 Difference]: With dead ends: 714 [2021-05-02 23:58:10,831 INFO L226 Difference]: Without dead ends: 569 [2021-05-02 23:58:10,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 9005.1ms TimeCoverageRelationStatistics Valid=439, Invalid=7217, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:58:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-05-02 23:58:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 412. [2021-05-02 23:58:11,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 404 states have (on average 1.0891089108910892) internal successors, (440), 405 states have internal predecessors, (440), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:58:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 447 transitions. [2021-05-02 23:58:11,129 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 447 transitions. Word has length 89 [2021-05-02 23:58:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:11,129 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 447 transitions. [2021-05-02 23:58:11,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:58:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 447 transitions. [2021-05-02 23:58:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:58:11,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:11,130 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:11,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420 [2021-05-02 23:58:11,130 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:11,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1594379399, now seen corresponding path program 25 times [2021-05-02 23:58:11,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:11,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301558838] [2021-05-02 23:58:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:11,141 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2369 199999) (not (= v_~last~0_338 v_main_~c~0_2369))) InVars {main_~c~0=v_main_~c~0_2369, ~last~0=v_~last~0_338} OutVars{main_~c~0=v_main_~c~0_2369, ~last~0=v_~last~0_338} AuxVars[] AssignedVars[] [2021-05-02 23:58:11,143 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:58:11,144 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:11,146 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:11,163 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:58:11,174 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:58:11,222 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:58:11,271 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2371 199999) (= v_~last~0_339 v_main_~c~0_2371)) InVars {main_~c~0=v_main_~c~0_2371, ~last~0=v_~last~0_339} OutVars{main_~c~0=v_main_~c~0_2371, ~last~0=v_~last~0_339} AuxVars[] AssignedVars[] [2021-05-02 23:58:11,273 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:58:11,296 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:11,298 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:11,315 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:58:11,319 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:58:11,322 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:58:11,340 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:11,343 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2373 200000) (not (= v_~last~0_340 v_main_~c~0_2373))) InVars {main_~c~0=v_main_~c~0_2373, ~last~0=v_~last~0_340} OutVars{main_~c~0=v_main_~c~0_2373, ~last~0=v_~last~0_340} AuxVars[] AssignedVars[] [2021-05-02 23:58:11,344 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:58:11,345 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:11,347 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:11,366 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:58:11,377 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:58:11,426 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:58:11,475 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_341 v_main_~c~0_2375) (< v_main_~c~0_2375 200000)) InVars {main_~c~0=v_main_~c~0_2375, ~last~0=v_~last~0_341} OutVars{main_~c~0=v_main_~c~0_2375, ~last~0=v_~last~0_341} AuxVars[] AssignedVars[] [2021-05-02 23:58:11,477 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:58:11,478 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:11,480 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:11,498 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:58:11,502 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:58:11,523 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:58:11,540 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:11,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:11,596 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 23:58:11,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:58:14,404 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:14,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301558838] [2021-05-02 23:58:14,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [301558838] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:14,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:14,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:58:14,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106183089] [2021-05-02 23:58:14,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:58:14,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:58:14,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:58:14,406 INFO L87 Difference]: Start difference. First operand 412 states and 447 transitions. Second operand has 57 states, 57 states have (on average 1.543859649122807) internal successors, (88), 56 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 23:58:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:21,047 INFO L93 Difference]: Finished difference Result 581 states and 633 transitions. [2021-05-02 23:58:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:58:21,049 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.543859649122807) internal successors, (88), 56 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 23:58:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:21,051 INFO L225 Difference]: With dead ends: 581 [2021-05-02 23:58:21,051 INFO L226 Difference]: Without dead ends: 436 [2021-05-02 23:58:21,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 2736.0ms TimeCoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:58:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-02 23:58:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 415. [2021-05-02 23:58:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 407 states have (on average 1.0884520884520885) internal successors, (443), 408 states have internal predecessors, (443), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:58:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 450 transitions. [2021-05-02 23:58:21,483 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 450 transitions. Word has length 92 [2021-05-02 23:58:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:21,483 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 450 transitions. [2021-05-02 23:58:21,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.543859649122807) internal successors, (88), 56 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 23:58:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 450 transitions. [2021-05-02 23:58:21,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:58:21,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:21,499 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:21,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425 [2021-05-02 23:58:21,500 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:21,500 INFO L82 PathProgramCache]: Analyzing trace with hash -304394043, now seen corresponding path program 45 times [2021-05-02 23:58:21,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:21,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447612302] [2021-05-02 23:58:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:21,513 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_342 v_main_~c~0_2405)) (< v_main_~c~0_2405 199999)) InVars {main_~c~0=v_main_~c~0_2405, ~last~0=v_~last~0_342} OutVars{main_~c~0=v_main_~c~0_2405, ~last~0=v_~last~0_342} AuxVars[] AssignedVars[] [2021-05-02 23:58:21,518 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:58:21,519 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:21,522 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:21,546 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:58:21,560 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:58:21,615 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:58:21,687 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2407 199999) (= v_~last~0_343 v_main_~c~0_2407)) InVars {main_~c~0=v_main_~c~0_2407, ~last~0=v_~last~0_343} OutVars{main_~c~0=v_main_~c~0_2407, ~last~0=v_~last~0_343} AuxVars[] AssignedVars[] [2021-05-02 23:58:21,689 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:58:21,721 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:21,732 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:21,752 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:58:21,757 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:58:21,762 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:58:21,785 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:21,788 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_344 v_main_~c~0_2409)) (< v_main_~c~0_2409 200000)) InVars {main_~c~0=v_main_~c~0_2409, ~last~0=v_~last~0_344} OutVars{main_~c~0=v_main_~c~0_2409, ~last~0=v_~last~0_344} AuxVars[] AssignedVars[] [2021-05-02 23:58:21,790 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:58:21,792 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:21,794 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:21,819 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:58:21,834 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:58:21,898 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:58:21,965 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_345 v_main_~c~0_2411) (< v_main_~c~0_2411 200000)) InVars {main_~c~0=v_main_~c~0_2411, ~last~0=v_~last~0_345} OutVars{main_~c~0=v_main_~c~0_2411, ~last~0=v_~last~0_345} AuxVars[] AssignedVars[] [2021-05-02 23:58:21,968 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:58:22,001 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:22,003 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:22,025 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:58:22,030 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:58:22,035 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:58:22,058 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:22,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:22,259 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 23:58:22,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:58:22,382 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-02 23:58:26,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:26,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447612302] [2021-05-02 23:58:26,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [447612302] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:26,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:26,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:58:26,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19670227] [2021-05-02 23:58:26,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:58:26,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:58:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:58:26,491 INFO L87 Difference]: Start difference. First operand 415 states and 450 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 39 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 23:58:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:31,636 INFO L93 Difference]: Finished difference Result 769 states and 826 transitions. [2021-05-02 23:58:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:58:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 39 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 23:58:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:31,639 INFO L225 Difference]: With dead ends: 769 [2021-05-02 23:58:31,639 INFO L226 Difference]: Without dead ends: 621 [2021-05-02 23:58:31,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 29 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 4422.3ms TimeCoverageRelationStatistics Valid=192, Invalid=1970, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:58:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-05-02 23:58:31,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 415. [2021-05-02 23:58:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 407 states have (on average 1.0884520884520885) internal successors, (443), 408 states have internal predecessors, (443), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:58:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 450 transitions. [2021-05-02 23:58:31,944 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 450 transitions. Word has length 92 [2021-05-02 23:58:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:31,945 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 450 transitions. [2021-05-02 23:58:31,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 39 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 23:58:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 450 transitions. [2021-05-02 23:58:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:58:31,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:31,945 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:31,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430 [2021-05-02 23:58:31,946 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1801092865, now seen corresponding path program 46 times [2021-05-02 23:58:31,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:31,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817817294] [2021-05-02 23:58:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:31,957 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2441 199999) (not (= v_~last~0_346 v_main_~c~0_2441))) InVars {main_~c~0=v_main_~c~0_2441, ~last~0=v_~last~0_346} OutVars{main_~c~0=v_main_~c~0_2441, ~last~0=v_~last~0_346} AuxVars[] AssignedVars[] [2021-05-02 23:58:31,959 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:58:31,982 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:31,985 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:32,009 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:58:32,023 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:58:32,061 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:58:32,128 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2443 199999) (= v_~last~0_347 v_main_~c~0_2443)) InVars {main_~c~0=v_main_~c~0_2443, ~last~0=v_~last~0_347} OutVars{main_~c~0=v_main_~c~0_2443, ~last~0=v_~last~0_347} AuxVars[] AssignedVars[] [2021-05-02 23:58:32,131 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:58:32,161 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:32,163 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:32,195 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:58:32,203 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:58:32,210 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:58:32,244 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:32,249 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_348 v_main_~c~0_2445)) (< v_main_~c~0_2445 200000)) InVars {main_~c~0=v_main_~c~0_2445, ~last~0=v_~last~0_348} OutVars{main_~c~0=v_main_~c~0_2445, ~last~0=v_~last~0_348} AuxVars[] AssignedVars[] [2021-05-02 23:58:32,252 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:58:32,254 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:32,257 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:32,296 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:58:32,317 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:58:32,403 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:58:32,508 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2447 200000) (= v_~last~0_349 v_main_~c~0_2447)) InVars {main_~c~0=v_main_~c~0_2447, ~last~0=v_~last~0_349} OutVars{main_~c~0=v_main_~c~0_2447, ~last~0=v_~last~0_349} AuxVars[] AssignedVars[] [2021-05-02 23:58:32,510 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:58:32,512 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:32,517 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:32,550 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:58:32,559 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:58:32,608 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:58:32,652 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:32,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:32,945 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 23:58:32,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:58:33,131 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-02 23:58:40,524 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:40,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817817294] [2021-05-02 23:58:40,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817817294] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:40,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:40,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:58:40,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404855892] [2021-05-02 23:58:40,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:58:40,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:58:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:58:40,525 INFO L87 Difference]: Start difference. First operand 415 states and 450 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 46 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 23:58:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:50,150 INFO L93 Difference]: Finished difference Result 754 states and 811 transitions. [2021-05-02 23:58:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:58:50,154 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 46 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 23:58:50,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:50,155 INFO L225 Difference]: With dead ends: 754 [2021-05-02 23:58:50,155 INFO L226 Difference]: Without dead ends: 606 [2021-05-02 23:58:50,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 20 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 8937.4ms TimeCoverageRelationStatistics Valid=276, Invalid=3384, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:58:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-05-02 23:58:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 415. [2021-05-02 23:58:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 407 states have (on average 1.0884520884520885) internal successors, (443), 408 states have internal predecessors, (443), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:58:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 450 transitions. [2021-05-02 23:58:50,548 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 450 transitions. Word has length 92 [2021-05-02 23:58:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:50,548 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 450 transitions. [2021-05-02 23:58:50,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 46 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 23:58:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 450 transitions. [2021-05-02 23:58:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:58:50,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:50,549 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:50,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435 [2021-05-02 23:58:50,549 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:50,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1120979583, now seen corresponding path program 47 times [2021-05-02 23:58:50,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:50,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123733490] [2021-05-02 23:58:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:50,567 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_350 v_main_~c~0_2477)) (< v_main_~c~0_2477 199999)) InVars {main_~c~0=v_main_~c~0_2477, ~last~0=v_~last~0_350} OutVars{main_~c~0=v_main_~c~0_2477, ~last~0=v_~last~0_350} AuxVars[] AssignedVars[] [2021-05-02 23:58:50,569 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:58:50,605 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:50,608 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:50,644 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:58:50,664 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:58:50,718 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:58:50,817 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_351 v_main_~c~0_2479) (< v_main_~c~0_2479 199999)) InVars {main_~c~0=v_main_~c~0_2479, ~last~0=v_~last~0_351} OutVars{main_~c~0=v_main_~c~0_2479, ~last~0=v_~last~0_351} AuxVars[] AssignedVars[] [2021-05-02 23:58:50,820 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:58:50,822 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:50,825 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:50,858 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:58:50,866 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:58:50,906 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:58:50,942 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:50,946 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_352 v_main_~c~0_2481)) (< v_main_~c~0_2481 200000)) InVars {main_~c~0=v_main_~c~0_2481, ~last~0=v_~last~0_352} OutVars{main_~c~0=v_main_~c~0_2481, ~last~0=v_~last~0_352} AuxVars[] AssignedVars[] [2021-05-02 23:58:50,949 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:58:50,951 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:50,955 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:50,988 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:58:51,009 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:58:51,096 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:58:51,208 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:58:51,224 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_353 v_main_~c~0_2483) (< v_main_~c~0_2483 200000)) InVars {main_~c~0=v_main_~c~0_2483, ~last~0=v_~last~0_353} OutVars{main_~c~0=v_main_~c~0_2483, ~last~0=v_~last~0_353} AuxVars[] AssignedVars[] [2021-05-02 23:58:51,227 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:58:51,230 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:51,234 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:51,283 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:58:51,293 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:58:51,342 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:58:51,383 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:51,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:51,660 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 23:58:51,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:58:51,875 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-02 23:58:55,435 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 23:58:56,022 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:58:59,942 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:59,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123733490] [2021-05-02 23:58:59,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1123733490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:59,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:59,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:58:59,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161743857] [2021-05-02 23:58:59,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:58:59,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:58:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2440, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:58:59,944 INFO L87 Difference]: Start difference. First operand 415 states and 450 transitions. Second operand has 50 states, 50 states have (on average 1.76) internal successors, (88), 48 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 23:59:04,889 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 11 [2021-05-02 23:59:05,999 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 11 [2021-05-02 23:59:06,580 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 11 [2021-05-02 23:59:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:59:11,185 INFO L93 Difference]: Finished difference Result 749 states and 806 transitions. [2021-05-02 23:59:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:59:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.76) internal successors, (88), 48 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 23:59:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:59:11,190 INFO L225 Difference]: With dead ends: 749 [2021-05-02 23:59:11,190 INFO L226 Difference]: Without dead ends: 601 [2021-05-02 23:59:11,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 22 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 9905.1ms TimeCoverageRelationStatistics Valid=300, Invalid=3860, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:59:11,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-05-02 23:59:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 415. [2021-05-02 23:59:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 407 states have (on average 1.0884520884520885) internal successors, (443), 408 states have internal predecessors, (443), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:59:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 450 transitions. [2021-05-02 23:59:11,739 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 450 transitions. Word has length 92 [2021-05-02 23:59:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:59:11,740 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 450 transitions. [2021-05-02 23:59:11,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.76) internal successors, (88), 48 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 23:59:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 450 transitions. [2021-05-02 23:59:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:59:11,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:59:11,741 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:59:11,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440 [2021-05-02 23:59:11,741 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:59:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:59:11,742 INFO L82 PathProgramCache]: Analyzing trace with hash -93479739, now seen corresponding path program 48 times [2021-05-02 23:59:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:59:11,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035602052] [2021-05-02 23:59:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:59:11,755 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2513 199999) (not (= v_~last~0_354 v_main_~c~0_2513))) InVars {main_~c~0=v_main_~c~0_2513, ~last~0=v_~last~0_354} OutVars{main_~c~0=v_main_~c~0_2513, ~last~0=v_~last~0_354} AuxVars[] AssignedVars[] [2021-05-02 23:59:11,758 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:59:11,800 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:11,804 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:11,844 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:59:11,869 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:59:11,933 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:59:12,038 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:59:12,048 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2515 199999) (= v_~last~0_355 v_main_~c~0_2515)) InVars {main_~c~0=v_main_~c~0_2515, ~last~0=v_~last~0_355} OutVars{main_~c~0=v_main_~c~0_2515, ~last~0=v_~last~0_355} AuxVars[] AssignedVars[] [2021-05-02 23:59:12,050 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:59:12,053 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:12,062 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:12,099 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:59:12,107 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:59:12,149 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:59:12,188 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:59:12,192 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2517 200000) (not (= v_~last~0_356 v_main_~c~0_2517))) InVars {main_~c~0=v_main_~c~0_2517, ~last~0=v_~last~0_356} OutVars{main_~c~0=v_main_~c~0_2517, ~last~0=v_~last~0_356} AuxVars[] AssignedVars[] [2021-05-02 23:59:12,195 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:59:12,197 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:12,201 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:12,235 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:59:12,256 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:59:12,346 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:59:12,449 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:59:12,459 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2519 200000) (= v_~last~0_357 v_main_~c~0_2519)) InVars {main_~c~0=v_main_~c~0_2519, ~last~0=v_~last~0_357} OutVars{main_~c~0=v_main_~c~0_2519, ~last~0=v_~last~0_357} AuxVars[] AssignedVars[] [2021-05-02 23:59:12,462 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:59:12,464 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:12,468 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:12,498 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:59:12,505 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:59:12,546 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:59:12,580 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:59:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:59:12,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:59:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:59:12,898 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 23:59:12,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:13,173 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-02 23:59:13,357 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-02 23:59:13,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:13,531 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2021-05-02 23:59:18,352 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 23:59:19,869 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:59:19,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035602052] [2021-05-02 23:59:19,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035602052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:59:19,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:59:19,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:59:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217232444] [2021-05-02 23:59:19,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:59:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:59:19,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:59:19,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=3175, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:59:19,870 INFO L87 Difference]: Start difference. First operand 415 states and 450 transitions. Second operand has 57 states, 57 states have (on average 1.543859649122807) internal successors, (88), 55 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 23:59:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:59:27,099 INFO L93 Difference]: Finished difference Result 734 states and 791 transitions. [2021-05-02 23:59:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:59:27,102 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.543859649122807) internal successors, (88), 55 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 23:59:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:59:27,103 INFO L225 Difference]: With dead ends: 734 [2021-05-02 23:59:27,103 INFO L226 Difference]: Without dead ends: 586 [2021-05-02 23:59:27,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 25 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 8761.3ms TimeCoverageRelationStatistics Valid=384, Invalid=5778, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:59:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-05-02 23:59:27,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 415. [2021-05-02 23:59:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 407 states have (on average 1.0884520884520885) internal successors, (443), 408 states have internal predecessors, (443), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:59:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 450 transitions. [2021-05-02 23:59:27,417 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 450 transitions. Word has length 92 [2021-05-02 23:59:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:59:27,418 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 450 transitions. [2021-05-02 23:59:27,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.543859649122807) internal successors, (88), 55 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 23:59:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 450 transitions. [2021-05-02 23:59:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:59:27,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:59:27,419 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:59:27,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445 [2021-05-02 23:59:27,419 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:59:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:59:27,419 INFO L82 PathProgramCache]: Analyzing trace with hash -227493245, now seen corresponding path program 26 times [2021-05-02 23:59:27,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:59:27,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321861443] [2021-05-02 23:59:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:59:27,425 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_358 v_main_~c~0_2549)) (< v_main_~c~0_2549 199999)) InVars {main_~c~0=v_main_~c~0_2549, ~last~0=v_~last~0_358} OutVars{main_~c~0=v_main_~c~0_2549, ~last~0=v_~last~0_358} AuxVars[] AssignedVars[] [2021-05-02 23:59:27,427 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:59:27,449 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:27,451 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:27,472 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:59:27,484 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:59:27,516 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:59:27,581 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:59:27,584 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_359 v_main_~c~0_2551)) (< v_main_~c~0_2551 200000)) InVars {main_~c~0=v_main_~c~0_2551, ~last~0=v_~last~0_359} OutVars{main_~c~0=v_main_~c~0_2551, ~last~0=v_~last~0_359} AuxVars[] AssignedVars[] [2021-05-02 23:59:27,586 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:59:27,609 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:27,611 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:27,633 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:59:27,645 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:59:27,677 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:59:27,737 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:59:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:59:27,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:59:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:59:27,911 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 23:59:28,014 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-02 23:59:32,917 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-02 23:59:33,347 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-02 23:59:33,736 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-02 23:59:34,392 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-02 23:59:35,028 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-02 23:59:35,308 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-02 23:59:35,546 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-02 23:59:35,549 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:59:35,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321861443] [2021-05-02 23:59:35,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1321861443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:59:35,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:59:35,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:59:35,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101139587] [2021-05-02 23:59:35,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:59:35,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:59:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:59:35,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=3763, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:59:35,550 INFO L87 Difference]: Start difference. First operand 415 states and 450 transitions. Second operand has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 60 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 23:59:42,512 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2021-05-02 23:59:42,890 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 11 [2021-05-02 23:59:43,353 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 11 [2021-05-02 23:59:43,923 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 11 [2021-05-02 23:59:44,623 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 11 [2021-05-02 23:59:45,308 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2021-05-02 23:59:45,994 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 11 [2021-05-02 23:59:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:59:46,347 INFO L93 Difference]: Finished difference Result 727 states and 786 transitions. [2021-05-02 23:59:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:59:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 60 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 23:59:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:59:46,353 INFO L225 Difference]: With dead ends: 727 [2021-05-02 23:59:46,353 INFO L226 Difference]: Without dead ends: 579 [2021-05-02 23:59:46,354 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 11204.3ms TimeCoverageRelationStatistics Valid=455, Invalid=7735, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:59:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-05-02 23:59:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 418. [2021-05-02 23:59:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 410 states have (on average 1.0902439024390245) internal successors, (447), 411 states have internal predecessors, (447), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:59:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 454 transitions. [2021-05-02 23:59:46,759 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 454 transitions. Word has length 92 [2021-05-02 23:59:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:59:46,759 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 454 transitions. [2021-05-02 23:59:46,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 60 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 23:59:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 454 transitions. [2021-05-02 23:59:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 23:59:46,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:59:46,760 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:59:46,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448 [2021-05-02 23:59:46,760 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:59:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:59:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash -91153980, now seen corresponding path program 26 times [2021-05-02 23:59:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:59:46,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336609361] [2021-05-02 23:59:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:59:46,775 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2580 199999) (not (= v_~last~0_360 v_main_~c~0_2580))) InVars {main_~c~0=v_main_~c~0_2580, ~last~0=v_~last~0_360} OutVars{main_~c~0=v_main_~c~0_2580, ~last~0=v_~last~0_360} AuxVars[] AssignedVars[] [2021-05-02 23:59:46,777 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:59:46,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:46,784 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:46,826 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:59:46,850 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:59:46,947 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:59:47,065 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:59:47,075 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_361 v_main_~c~0_2582) (< v_main_~c~0_2582 199999)) InVars {main_~c~0=v_main_~c~0_2582, ~last~0=v_~last~0_361} OutVars{main_~c~0=v_main_~c~0_2582, ~last~0=v_~last~0_361} AuxVars[] AssignedVars[] [2021-05-02 23:59:47,078 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:59:47,125 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:47,129 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:47,164 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:59:47,173 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:59:47,183 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:59:47,229 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:59:47,234 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_362 v_main_~c~0_2584)) (< v_main_~c~0_2584 200000)) InVars {main_~c~0=v_main_~c~0_2584, ~last~0=v_~last~0_362} OutVars{main_~c~0=v_main_~c~0_2584, ~last~0=v_~last~0_362} AuxVars[] AssignedVars[] [2021-05-02 23:59:47,237 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-02 23:59:47,276 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:47,290 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:47,338 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-02 23:59:47,366 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-02 23:59:47,446 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-02 23:59:47,573 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:59:47,585 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2586 200000) (= v_~last~0_363 v_main_~c~0_2586)) InVars {main_~c~0=v_main_~c~0_2586, ~last~0=v_~last~0_363} OutVars{main_~c~0=v_main_~c~0_2586, ~last~0=v_~last~0_363} AuxVars[] AssignedVars[] [2021-05-02 23:59:47,587 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-02 23:59:47,637 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:47,642 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:47,683 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-02 23:59:47,693 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-02 23:59:47,701 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-02 23:59:47,744 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:59:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:59:47,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:59:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:59:47,852 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 23:59:47,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:52,218 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:59:52,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336609361] [2021-05-02 23:59:52,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336609361] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:59:52,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:59:52,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:59:52,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554952373] [2021-05-02 23:59:52,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:59:52,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:59:52,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:59:52,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3280, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:59:52,219 INFO L87 Difference]: Start difference. First operand 418 states and 454 transitions. Second operand has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:59:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:59:59,702 INFO L93 Difference]: Finished difference Result 590 states and 643 transitions. [2021-05-02 23:59:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:59:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2021-05-02 23:59:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:59:59,708 INFO L225 Difference]: With dead ends: 590 [2021-05-02 23:59:59,709 INFO L226 Difference]: Without dead ends: 442 [2021-05-02 23:59:59,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 4229.4ms TimeCoverageRelationStatistics Valid=142, Invalid=3280, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:59:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-03 00:00:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 421. [2021-05-03 00:00:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 413 states have (on average 1.089588377723971) internal successors, (450), 414 states have internal predecessors, (450), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:00:00,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 457 transitions. [2021-05-03 00:00:00,029 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 457 transitions. Word has length 95 [2021-05-03 00:00:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:00:00,029 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 457 transitions. [2021-05-03 00:00:00,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:00:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 457 transitions. [2021-05-03 00:00:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-03 00:00:00,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:00:00,030 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:00:00,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453 [2021-05-03 00:00:00,030 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:00:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:00:00,030 INFO L82 PathProgramCache]: Analyzing trace with hash -697072698, now seen corresponding path program 49 times [2021-05-03 00:00:00,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:00:00,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774039446] [2021-05-03 00:00:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:00:00,040 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_364 v_main_~c~0_2617)) (< v_main_~c~0_2617 199999)) InVars {main_~c~0=v_main_~c~0_2617, ~last~0=v_~last~0_364} OutVars{main_~c~0=v_main_~c~0_2617, ~last~0=v_~last~0_364} AuxVars[] AssignedVars[] [2021-05-03 00:00:00,042 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:00:00,066 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:00,069 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:00,095 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:00:00,108 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:00:00,144 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:00:00,214 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_365 v_main_~c~0_2619) (< v_main_~c~0_2619 199999)) InVars {main_~c~0=v_main_~c~0_2619, ~last~0=v_~last~0_365} OutVars{main_~c~0=v_main_~c~0_2619, ~last~0=v_~last~0_365} AuxVars[] AssignedVars[] [2021-05-03 00:00:00,216 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:00:00,217 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:00,220 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:00,248 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:00:00,253 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:00:00,285 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:00:00,314 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:00:00,317 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_366 v_main_~c~0_2621)) (< v_main_~c~0_2621 200000)) InVars {main_~c~0=v_main_~c~0_2621, ~last~0=v_~last~0_366} OutVars{main_~c~0=v_main_~c~0_2621, ~last~0=v_~last~0_366} AuxVars[] AssignedVars[] [2021-05-03 00:00:00,320 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:00:00,321 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:00,324 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:00,353 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:00:00,370 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:00:00,433 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:00:00,518 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2623 200000) (= v_~last~0_367 v_main_~c~0_2623)) InVars {main_~c~0=v_main_~c~0_2623, ~last~0=v_~last~0_367} OutVars{main_~c~0=v_main_~c~0_2623, ~last~0=v_~last~0_367} AuxVars[] AssignedVars[] [2021-05-03 00:00:00,520 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:00:00,556 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:00,558 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:00,584 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:00:00,590 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:00:00,595 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:00:00,621 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:00:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:00:00,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:00:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:00:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:00:00,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:00:01,008 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-05-03 00:00:01,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:00:05,894 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:00:05,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774039446] [2021-05-03 00:00:05,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [774039446] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:00:05,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:00:05,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-03 00:00:05,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137144286] [2021-05-03 00:00:05,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-03 00:00:05,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:00:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-03 00:00:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:00:05,896 INFO L87 Difference]: Start difference. First operand 421 states and 457 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:00:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:00:13,296 INFO L93 Difference]: Finished difference Result 782 states and 840 transitions. [2021-05-03 00:00:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 00:00:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2021-05-03 00:00:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:00:13,302 INFO L225 Difference]: With dead ends: 782 [2021-05-03 00:00:13,302 INFO L226 Difference]: Without dead ends: 631 [2021-05-03 00:00:13,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 29 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 5423.0ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:00:13,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-05-03 00:00:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 421. [2021-05-03 00:00:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 413 states have (on average 1.089588377723971) internal successors, (450), 414 states have internal predecessors, (450), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:00:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 457 transitions. [2021-05-03 00:00:13,716 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 457 transitions. Word has length 95 [2021-05-03 00:00:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:00:13,717 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 457 transitions. [2021-05-03 00:00:13,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 41 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:00:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 457 transitions. [2021-05-03 00:00:13,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-03 00:00:13,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:00:13,717 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:00:13,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458 [2021-05-03 00:00:13,717 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:00:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:00:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1408414210, now seen corresponding path program 50 times [2021-05-03 00:00:13,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:00:13,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916731438] [2021-05-03 00:00:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:00:13,732 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_368 v_main_~c~0_2654)) (< v_main_~c~0_2654 199999)) InVars {main_~c~0=v_main_~c~0_2654, ~last~0=v_~last~0_368} OutVars{main_~c~0=v_main_~c~0_2654, ~last~0=v_~last~0_368} AuxVars[] AssignedVars[] [2021-05-03 00:00:13,734 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:00:13,777 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:13,782 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:13,821 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:00:13,844 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:00:13,918 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:00:14,046 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 00:00:14,057 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2656 199999) (= v_~last~0_369 v_main_~c~0_2656)) InVars {main_~c~0=v_main_~c~0_2656, ~last~0=v_~last~0_369} OutVars{main_~c~0=v_main_~c~0_2656, ~last~0=v_~last~0_369} AuxVars[] AssignedVars[] [2021-05-03 00:00:14,059 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:00:14,061 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:14,065 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:14,106 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:00:14,115 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:00:14,164 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:00:14,207 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:00:14,212 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2658 200000) (not (= v_~last~0_370 v_main_~c~0_2658))) InVars {main_~c~0=v_main_~c~0_2658, ~last~0=v_~last~0_370} OutVars{main_~c~0=v_main_~c~0_2658, ~last~0=v_~last~0_370} AuxVars[] AssignedVars[] [2021-05-03 00:00:14,214 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:00:14,241 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:14,244 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:14,272 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:00:14,288 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:00:14,331 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:00:14,405 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_371 v_main_~c~0_2660) (< v_main_~c~0_2660 200000)) InVars {main_~c~0=v_main_~c~0_2660, ~last~0=v_~last~0_371} OutVars{main_~c~0=v_main_~c~0_2660, ~last~0=v_~last~0_371} AuxVars[] AssignedVars[] [2021-05-03 00:00:14,407 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:00:14,409 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:14,411 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:14,433 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:00:14,438 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:00:14,469 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:00:14,494 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:00:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:00:14,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:00:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:00:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:00:14,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:00:14,873 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-05-03 00:00:17,652 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 00:00:17,890 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 13 [2021-05-03 00:00:22,161 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:00:22,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916731438] [2021-05-03 00:00:22,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [916731438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:00:22,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:00:22,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-03 00:00:22,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563838014] [2021-05-03 00:00:22,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-03 00:00:22,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:00:22,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-03 00:00:22,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2442, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 00:00:22,162 INFO L87 Difference]: Start difference. First operand 421 states and 457 transitions. Second operand has 50 states, 50 states have (on average 1.82) internal successors, (91), 48 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:00:26,249 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 11 [2021-05-03 00:00:26,820 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2021-05-03 00:00:27,411 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 11 [2021-05-03 00:00:32,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:00:32,157 INFO L93 Difference]: Finished difference Result 767 states and 825 transitions. [2021-05-03 00:00:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 00:00:32,160 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.82) internal successors, (91), 48 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2021-05-03 00:00:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:00:32,161 INFO L225 Difference]: With dead ends: 767 [2021-05-03 00:00:32,161 INFO L226 Difference]: Without dead ends: 616 [2021-05-03 00:00:32,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 17 SyntacticMatches, 28 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 8935.0ms TimeCoverageRelationStatistics Valid=291, Invalid=3741, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 00:00:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-05-03 00:00:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 421. [2021-05-03 00:00:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 413 states have (on average 1.089588377723971) internal successors, (450), 414 states have internal predecessors, (450), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:00:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 457 transitions. [2021-05-03 00:00:32,503 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 457 transitions. Word has length 95 [2021-05-03 00:00:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:00:32,503 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 457 transitions. [2021-05-03 00:00:32,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.82) internal successors, (91), 48 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:00:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 457 transitions. [2021-05-03 00:00:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-03 00:00:32,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:00:32,503 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:00:32,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463 [2021-05-03 00:00:32,504 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:00:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:00:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1513658238, now seen corresponding path program 51 times [2021-05-03 00:00:32,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:00:32,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875112858] [2021-05-03 00:00:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:00:32,513 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_372 v_main_~c~0_2691)) (< v_main_~c~0_2691 199999)) InVars {main_~c~0=v_main_~c~0_2691, ~last~0=v_~last~0_372} OutVars{main_~c~0=v_main_~c~0_2691, ~last~0=v_~last~0_372} AuxVars[] AssignedVars[] [2021-05-03 00:00:32,515 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:00:32,516 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:32,518 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:32,542 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:00:32,557 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:00:32,617 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:00:32,690 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_373 v_main_~c~0_2693) (< v_main_~c~0_2693 199999)) InVars {main_~c~0=v_main_~c~0_2693, ~last~0=v_~last~0_373} OutVars{main_~c~0=v_main_~c~0_2693, ~last~0=v_~last~0_373} AuxVars[] AssignedVars[] [2021-05-03 00:00:32,692 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:00:32,721 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:32,723 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:32,746 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:00:32,750 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:00:32,755 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:00:32,776 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:00:32,779 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_374 v_main_~c~0_2695)) (< v_main_~c~0_2695 200000)) InVars {main_~c~0=v_main_~c~0_2695, ~last~0=v_~last~0_374} OutVars{main_~c~0=v_main_~c~0_2695, ~last~0=v_~last~0_374} AuxVars[] AssignedVars[] [2021-05-03 00:00:32,781 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:00:32,783 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:32,785 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:32,810 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:00:32,824 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:00:32,883 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:00:32,946 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2697 200000) (= v_~last~0_375 v_main_~c~0_2697)) InVars {main_~c~0=v_main_~c~0_2697, ~last~0=v_~last~0_375} OutVars{main_~c~0=v_main_~c~0_2697, ~last~0=v_~last~0_375} AuxVars[] AssignedVars[] [2021-05-03 00:00:32,948 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:00:32,978 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:32,981 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:33,006 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:00:33,011 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:00:33,016 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:00:33,041 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:00:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:00:33,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:00:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:00:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:00:33,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:00:33,432 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-05-03 00:00:39,623 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:00:39,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875112858] [2021-05-03 00:00:39,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [875112858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:00:39,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:00:39,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-03 00:00:39,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906494625] [2021-05-03 00:00:39,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-03 00:00:39,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:00:39,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-03 00:00:39,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 00:00:39,624 INFO L87 Difference]: Start difference. First operand 421 states and 457 transitions. Second operand has 52 states, 52 states have (on average 1.75) internal successors, (91), 50 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:00:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:00:49,412 INFO L93 Difference]: Finished difference Result 762 states and 820 transitions. [2021-05-03 00:00:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 00:00:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 50 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2021-05-03 00:00:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:00:49,416 INFO L225 Difference]: With dead ends: 762 [2021-05-03 00:00:49,416 INFO L226 Difference]: Without dead ends: 611 [2021-05-03 00:00:49,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 27 SyntacticMatches, 16 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 7821.4ms TimeCoverageRelationStatistics Valid=315, Invalid=4241, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 00:00:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-05-03 00:00:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 421. [2021-05-03 00:00:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 413 states have (on average 1.089588377723971) internal successors, (450), 414 states have internal predecessors, (450), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:00:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 457 transitions. [2021-05-03 00:00:49,770 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 457 transitions. Word has length 95 [2021-05-03 00:00:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:00:49,770 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 457 transitions. [2021-05-03 00:00:49,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 50 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:00:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 457 transitions. [2021-05-03 00:00:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-03 00:00:49,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:00:49,771 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:00:49,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468 [2021-05-03 00:00:49,771 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:00:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:00:49,771 INFO L82 PathProgramCache]: Analyzing trace with hash -486158394, now seen corresponding path program 52 times [2021-05-03 00:00:49,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:00:49,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625338327] [2021-05-03 00:00:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:00:49,780 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2728 199999) (not (= v_~last~0_376 v_main_~c~0_2728))) InVars {main_~c~0=v_main_~c~0_2728, ~last~0=v_~last~0_376} OutVars{main_~c~0=v_main_~c~0_2728, ~last~0=v_~last~0_376} AuxVars[] AssignedVars[] [2021-05-03 00:00:49,782 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:00:49,807 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:49,810 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:49,837 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:00:49,852 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:00:49,895 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:00:49,969 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= v_~last~0_377 v_main_~c~0_2730) (< v_main_~c~0_2730 199999)) InVars {main_~c~0=v_main_~c~0_2730, ~last~0=v_~last~0_377} OutVars{main_~c~0=v_main_~c~0_2730, ~last~0=v_~last~0_377} AuxVars[] AssignedVars[] [2021-05-03 00:00:49,971 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:00:49,972 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:49,975 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:49,997 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:00:50,002 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:00:50,033 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:00:50,057 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:00:50,060 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2732 200000) (not (= v_~last~0_378 v_main_~c~0_2732))) InVars {main_~c~0=v_main_~c~0_2732, ~last~0=v_~last~0_378} OutVars{main_~c~0=v_main_~c~0_2732, ~last~0=v_~last~0_378} AuxVars[] AssignedVars[] [2021-05-03 00:00:50,062 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:00:50,064 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:50,066 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:50,091 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:00:50,105 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:00:50,169 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:00:50,244 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2734 200000) (= v_~last~0_379 v_main_~c~0_2734)) InVars {main_~c~0=v_main_~c~0_2734, ~last~0=v_~last~0_379} OutVars{main_~c~0=v_main_~c~0_2734, ~last~0=v_~last~0_379} AuxVars[] AssignedVars[] [2021-05-03 00:00:50,247 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:00:50,248 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:50,251 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:00:50,271 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:00:50,277 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:00:50,308 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:00:50,335 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:00:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:00:50,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:00:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:00:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:00:50,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:00:50,687 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-03 00:00:55,316 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 00:00:55,554 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:00:56,239 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 00:00:56,625 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 00:00:56,883 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 00:00:58,645 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:00:58,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625338327] [2021-05-03 00:00:58,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [625338327] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:00:58,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:00:58,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-03 00:00:58,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756374803] [2021-05-03 00:00:58,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-03 00:00:58,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:00:58,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-03 00:00:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3404, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:00:58,647 INFO L87 Difference]: Start difference. First operand 421 states and 457 transitions. Second operand has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 57 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:01:05,760 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 11 [2021-05-03 00:01:06,225 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 11 [2021-05-03 00:01:06,681 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2021-05-03 00:01:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:01:08,447 INFO L93 Difference]: Finished difference Result 747 states and 805 transitions. [2021-05-03 00:01:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 00:01:08,450 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 57 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2021-05-03 00:01:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:01:08,451 INFO L225 Difference]: With dead ends: 747 [2021-05-03 00:01:08,451 INFO L226 Difference]: Without dead ends: 596 [2021-05-03 00:01:08,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 26 SyntacticMatches, 10 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 10642.4ms TimeCoverageRelationStatistics Valid=400, Invalid=6242, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 00:01:08,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-05-03 00:01:08,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 421. [2021-05-03 00:01:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 413 states have (on average 1.089588377723971) internal successors, (450), 414 states have internal predecessors, (450), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:01:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 457 transitions. [2021-05-03 00:01:08,807 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 457 transitions. Word has length 95 [2021-05-03 00:01:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:01:08,807 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 457 transitions. [2021-05-03 00:01:08,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 57 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:01:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 457 transitions. [2021-05-03 00:01:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-03 00:01:08,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:01:08,807 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:01:08,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473 [2021-05-03 00:01:08,808 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:01:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:01:08,808 INFO L82 PathProgramCache]: Analyzing trace with hash -620171900, now seen corresponding path program 27 times [2021-05-03 00:01:08,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:01:08,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241647439] [2021-05-03 00:01:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:01:08,815 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_380 v_main_~c~0_2765)) (< v_main_~c~0_2765 199999)) InVars {main_~c~0=v_main_~c~0_2765, ~last~0=v_~last~0_380} OutVars{main_~c~0=v_main_~c~0_2765, ~last~0=v_~last~0_380} AuxVars[] AssignedVars[] [2021-05-03 00:01:08,817 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:01:08,846 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:08,849 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:08,875 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:01:08,892 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:01:08,936 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:01:09,027 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:01:09,031 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2767 200000) (not (= v_~last~0_381 v_main_~c~0_2767))) InVars {main_~c~0=v_main_~c~0_2767, ~last~0=v_~last~0_381} OutVars{main_~c~0=v_main_~c~0_2767, ~last~0=v_~last~0_381} AuxVars[] AssignedVars[] [2021-05-03 00:01:09,033 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:01:09,034 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:09,037 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:09,066 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:01:09,083 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:01:09,166 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:01:09,258 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:01:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:01:09,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:01:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:01:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:01:09,619 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 00:01:13,166 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 00:01:13,756 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 00:01:14,139 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-03 00:01:14,393 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 00:01:14,791 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 00:01:15,581 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 00:01:15,962 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 00:01:16,554 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 00:01:16,804 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 00:01:17,180 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 00:01:17,441 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 00:01:17,698 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 00:01:17,965 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-03 00:01:18,238 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-03 00:01:18,524 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 00:01:18,829 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 00:01:19,097 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-03 00:01:19,406 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-05-03 00:01:19,739 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 00:01:19,742 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:01:19,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241647439] [2021-05-03 00:01:19,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [241647439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:01:19,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:01:19,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-03 00:01:19,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972905250] [2021-05-03 00:01:19,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-03 00:01:19,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:01:19,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-03 00:01:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=4012, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 00:01:19,743 INFO L87 Difference]: Start difference. First operand 421 states and 457 transitions. Second operand has 64 states, 64 states have (on average 1.421875) internal successors, (91), 62 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:01:24,738 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 11 [2021-05-03 00:01:26,525 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 11 [2021-05-03 00:01:27,001 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 11 [2021-05-03 00:01:27,530 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 11 [2021-05-03 00:01:28,022 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 11 [2021-05-03 00:01:28,491 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 11 [2021-05-03 00:01:28,950 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 11 [2021-05-03 00:01:29,523 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 11 [2021-05-03 00:01:30,082 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 11 [2021-05-03 00:01:30,658 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 11 [2021-05-03 00:01:31,178 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2021-05-03 00:01:31,682 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 11 [2021-05-03 00:01:32,198 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 11 [2021-05-03 00:01:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:01:32,477 INFO L93 Difference]: Finished difference Result 740 states and 800 transitions. [2021-05-03 00:01:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-03 00:01:32,480 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.421875) internal successors, (91), 62 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2021-05-03 00:01:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:01:32,481 INFO L225 Difference]: With dead ends: 740 [2021-05-03 00:01:32,482 INFO L226 Difference]: Without dead ends: 589 [2021-05-03 00:01:32,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2335 ImplicationChecksByTransitivity, 14459.4ms TimeCoverageRelationStatistics Valid=471, Invalid=8271, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 00:01:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-05-03 00:01:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 424. [2021-05-03 00:01:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 416 states have (on average 1.0913461538461537) internal successors, (454), 417 states have internal predecessors, (454), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:01:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 461 transitions. [2021-05-03 00:01:32,947 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 461 transitions. Word has length 95 [2021-05-03 00:01:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:01:32,947 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 461 transitions. [2021-05-03 00:01:32,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.421875) internal successors, (91), 62 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:01:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 461 transitions. [2021-05-03 00:01:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-03 00:01:32,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:01:32,948 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:01:32,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable476 [2021-05-03 00:01:32,948 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:01:32,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:01:32,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1353390233, now seen corresponding path program 27 times [2021-05-03 00:01:32,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:01:32,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069560065] [2021-05-03 00:01:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:01:32,965 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_382 v_main_~c~0_2797)) (< v_main_~c~0_2797 199999)) InVars {main_~c~0=v_main_~c~0_2797, ~last~0=v_~last~0_382} OutVars{main_~c~0=v_main_~c~0_2797, ~last~0=v_~last~0_382} AuxVars[] AssignedVars[] [2021-05-03 00:01:32,967 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:01:32,998 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:33,001 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:33,030 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:01:33,046 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:01:33,093 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:01:33,180 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2799 199999) (= v_~last~0_383 v_main_~c~0_2799)) InVars {main_~c~0=v_main_~c~0_2799, ~last~0=v_~last~0_383} OutVars{main_~c~0=v_main_~c~0_2799, ~last~0=v_~last~0_383} AuxVars[] AssignedVars[] [2021-05-03 00:01:33,182 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:01:33,220 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:33,223 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:33,248 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:01:33,255 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:01:33,260 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:01:33,289 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:01:33,293 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= v_~last~0_384 v_main_~c~0_2801)) (< v_main_~c~0_2801 200000)) InVars {main_~c~0=v_main_~c~0_2801, ~last~0=v_~last~0_384} OutVars{main_~c~0=v_main_~c~0_2801, ~last~0=v_~last~0_384} AuxVars[] AssignedVars[] [2021-05-03 00:01:33,295 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size [2021-05-03 00:01:33,324 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:33,327 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:33,354 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-03 00:01:33,372 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-03 00:01:33,418 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 90.7 percent of original size 68 [2021-05-03 00:01:33,514 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~c~0_2803 200000) (= v_~last~0_385 v_main_~c~0_2803)) InVars {main_~c~0=v_main_~c~0_2803, ~last~0=v_~last~0_385} OutVars{main_~c~0=v_main_~c~0_2803, ~last~0=v_~last~0_385} AuxVars[] AssignedVars[] [2021-05-03 00:01:33,516 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size [2021-05-03 00:01:33,518 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:33,521 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:01:33,551 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-03 00:01:33,557 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-03 00:01:33,592 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.4 percent of original size 74 [2021-05-03 00:01:33,621 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-03 00:01:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:01:33,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:01:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:01:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:01:33,716 WARN L159 QuantifierPusher]: Ignoring assumption.