/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-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:45:55,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:45:55,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:45:55,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:45:56,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:45:56,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:45:56,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:45:56,033 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 23:45:56,050 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:45:56,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:45:56,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:45:56,055 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:45:56,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:45:56,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:45:56,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:45:56,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:45:56,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:45:56,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:45:56,056 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:45:56,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:45:56,057 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:45:56,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:45:56,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:45:56,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:45:56,057 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:45:56,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:45:56,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:45:56,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:45:56,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:45:56,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:45:56,058 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:45:56,058 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:45:56,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:45:56,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:45:56,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:45:56,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:45:56,494 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:45:56,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2021-05-02 23:45:56,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1feda403/ad328f2e29e349e3833c810a3713fa66/FLAGea950247e [2021-05-02 23:45:57,028 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:45:57,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2021-05-02 23:45:57,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1feda403/ad328f2e29e349e3833c810a3713fa66/FLAGea950247e [2021-05-02 23:45:57,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1feda403/ad328f2e29e349e3833c810a3713fa66 [2021-05-02 23:45:57,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:45:57,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:45:57,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:45:57,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:45:57,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:45:57,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:45:57" (1/1) ... [2021-05-02 23:45:57,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef703e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57, skipping insertion in model container [2021-05-02 23:45:57,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:45:57" (1/1) ... [2021-05-02 23:45:57,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:45:57,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:45:57,203 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-new/half.i[891,904] [2021-05-02 23:45:57,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:45:57,258 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:45:57,273 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-new/half.i[891,904] [2021-05-02 23:45:57,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:45:57,293 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:45:57,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57 WrapperNode [2021-05-02 23:45:57,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:45:57,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:45:57,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:45:57,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:45:57,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57" (1/1) ... [2021-05-02 23:45:57,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57" (1/1) ... [2021-05-02 23:45:57,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57" (1/1) ... [2021-05-02 23:45:57,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57" (1/1) ... [2021-05-02 23:45:57,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57" (1/1) ... [2021-05-02 23:45:57,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57" (1/1) ... [2021-05-02 23:45:57,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57" (1/1) ... [2021-05-02 23:45:57,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:45:57,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:45:57,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:45:57,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:45:57,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57" (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 23:45:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:45:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:45:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:45:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 23:45:57,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:45:57,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:45:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:45:57,462 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:45:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 23:45:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 23:45:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:45:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:45:57,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 23:45:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:45:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:45:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:45:57,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:45:57,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:45:57,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:45:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:45:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:45:57,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:45:57,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:45:57,739 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:45:57,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:45:57 BoogieIcfgContainer [2021-05-02 23:45:57,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:45:57,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:45:57,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:45:57,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:45:57,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:45:57" (1/3) ... [2021-05-02 23:45:57,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647e890b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:45:57, skipping insertion in model container [2021-05-02 23:45:57,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:45:57" (2/3) ... [2021-05-02 23:45:57,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647e890b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:45:57, skipping insertion in model container [2021-05-02 23:45:57,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:45:57" (3/3) ... [2021-05-02 23:45:57,746 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2021-05-02 23:45:57,751 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:45:57,754 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:45:57,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:45:57,782 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:45:57,782 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:45:57,782 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:45:57,782 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:45:57,782 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:45:57,782 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:45:57,782 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:45:57,783 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:45:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 23:45:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:45:57,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:57,802 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:57,803 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:57,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1574076283, now seen corresponding path program 1 times [2021-05-02 23:45:57,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:57,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003224608] [2021-05-02 23:45:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:57,876 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:45:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:58,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:58,101 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:58,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003224608] [2021-05-02 23:45:58,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1003224608] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:58,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:58,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:45:58,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068679614] [2021-05-02 23:45:58,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:45:58,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:58,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:45:58,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:45:58,149 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:58,214 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 23:45:58,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:45:58,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:45:58,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:58,222 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:45:58,223 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:45:58,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:45:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:45:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 23:45:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 23:45:58,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-02 23:45:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:58,268 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 23:45:58,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 23:45:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:45:58,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:58,269 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:58,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:45:58,269 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:58,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1563917552, now seen corresponding path program 1 times [2021-05-02 23:45:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:58,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988947437] [2021-05-02 23:45:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:58,283 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:45:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:58,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:58,420 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:58,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988947437] [2021-05-02 23:45:58,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988947437] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:58,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:58,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:45:58,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175364850] [2021-05-02 23:45:58,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:45:58,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:58,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:45:58,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:45:58,423 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:58,655 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 23:45:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:45:58,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:45:58,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:58,658 INFO L225 Difference]: With dead ends: 27 [2021-05-02 23:45:58,658 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 23:45:58,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:45:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 23:45:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-05-02 23:45:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 23:45:58,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-05-02 23:45:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:58,675 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 23:45:58,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 23:45:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:45:58,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:58,678 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:58,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:45:58,679 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:58,679 INFO L82 PathProgramCache]: Analyzing trace with hash -505067407, now seen corresponding path program 1 times [2021-05-02 23:45:58,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:58,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132617857] [2021-05-02 23:45:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:58,730 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_10 (* 2 v_main_~k~0_8)) (= (mod v_main_~i~0_10 2) 0)) InVars {main_~i~0=v_main_~i~0_10, main_~k~0=v_main_~k~0_8} OutVars{main_~i~0=v_main_~i~0_10, main_~k~0=v_main_~k~0_8} AuxVars[] AssignedVars[] [2021-05-02 23:45:58,750 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:45:58,761 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:58,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:58,820 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:45:58,831 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:45:58,884 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:45:58,900 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:59,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:59,038 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 23:45:59,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:59,109 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:59,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132617857] [2021-05-02 23:45:59,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [132617857] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:59,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:59,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:45:59,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678886218] [2021-05-02 23:45:59,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:45:59,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:59,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:45:59,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:45:59,116 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:45:59,296 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-05-02 23:45:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:45:59,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2021-05-02 23:45:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:45:59,298 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:45:59,298 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 23:45:59,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:45:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 23:45:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-05-02 23:45:59,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-02 23:45:59,304 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2021-05-02 23:45:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:45:59,304 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-02 23:45:59,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:45:59,305 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-02 23:45:59,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:45:59,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:45:59,305 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:45:59,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:45:59,306 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:45:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:45:59,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1214691282, now seen corresponding path program 1 times [2021-05-02 23:45:59,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:45:59,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745079942] [2021-05-02 23:45:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:45:59,318 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_14 1) (* 2 v_main_~k~0_9)) (= (mod v_main_~i~0_14 2) 0)) InVars {main_~i~0=v_main_~i~0_14, main_~k~0=v_main_~k~0_9} OutVars{main_~i~0=v_main_~i~0_14, main_~k~0=v_main_~k~0_9} AuxVars[] AssignedVars[] [2021-05-02 23:45:59,325 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:45:59,351 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:59,356 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:59,394 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:45:59,397 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:45:59,400 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:45:59,412 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-02 23:45:59,415 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_16 2) 0)) (< v_main_~i~0_16 (* 2 v_main_~k~0_10))) InVars {main_~i~0=v_main_~i~0_16, main_~k~0=v_main_~k~0_10} OutVars{main_~i~0=v_main_~i~0_16, main_~k~0=v_main_~k~0_10} AuxVars[] AssignedVars[] [2021-05-02 23:45:59,419 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:45:59,421 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:59,425 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:59,434 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:45:59,437 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:45:59,449 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:45:59,462 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_18 (* 2 v_main_~k~0_11)) (= (mod v_main_~i~0_18 2) 0)) InVars {main_~i~0=v_main_~i~0_18, main_~k~0=v_main_~k~0_11} OutVars{main_~i~0=v_main_~i~0_18, main_~k~0=v_main_~k~0_11} AuxVars[] AssignedVars[] [2021-05-02 23:45:59,467 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:45:59,490 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:59,495 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:45:59,533 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:45:59,536 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:45:59,539 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:45:59,551 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:45:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:59,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:45:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:45:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:45:59,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:45:59,888 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:45:59,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745079942] [2021-05-02 23:45:59,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1745079942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:45:59,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:45:59,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:45:59,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832239216] [2021-05-02 23:45:59,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:45:59,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:45:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:45:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:45:59,891 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:00,139 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-05-02 23:46:00,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:46:00,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 23:46:00,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:00,141 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:46:00,141 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:46:00,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:46:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:46:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-05-02 23:46:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 23:46:00,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2021-05-02 23:46:00,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:00,151 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 23:46:00,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 23:46:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 23:46:00,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:00,152 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:00,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:46:00,152 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1894086065, now seen corresponding path program 2 times [2021-05-02 23:46:00,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:00,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215917066] [2021-05-02 23:46:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:00,166 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_24 2) 0) (< (+ v_main_~i~0_24 1) (* 2 v_main_~k~0_12))) InVars {main_~i~0=v_main_~i~0_24, main_~k~0=v_main_~k~0_12} OutVars{main_~i~0=v_main_~i~0_24, main_~k~0=v_main_~k~0_12} AuxVars[] AssignedVars[] [2021-05-02 23:46:00,177 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:00,179 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:00,183 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:00,209 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:00,212 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:00,236 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:00,265 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_26 1) (* 2 v_main_~k~0_13)) (not (= (mod v_main_~i~0_26 2) 0))) InVars {main_~i~0=v_main_~i~0_26, main_~k~0=v_main_~k~0_13} OutVars{main_~i~0=v_main_~i~0_26, main_~k~0=v_main_~k~0_13} AuxVars[] AssignedVars[] [2021-05-02 23:46:00,270 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:00,272 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:00,276 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:00,290 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:00,293 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:00,307 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:00,318 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:00,322 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_28 (* 2 v_main_~k~0_14)) (not (= (mod v_main_~i~0_28 2) 0))) InVars {main_~i~0=v_main_~i~0_28, main_~k~0=v_main_~k~0_14} OutVars{main_~i~0=v_main_~i~0_28, main_~k~0=v_main_~k~0_14} AuxVars[] AssignedVars[] [2021-05-02 23:46:00,327 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:00,349 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:00,358 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:00,374 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:00,377 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:00,381 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:00,396 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_30 (* 2 v_main_~k~0_15)) (= (mod v_main_~i~0_30 2) 0)) InVars {main_~i~0=v_main_~i~0_30, main_~k~0=v_main_~k~0_15} OutVars{main_~i~0=v_main_~i~0_30, main_~k~0=v_main_~k~0_15} AuxVars[] AssignedVars[] [2021-05-02 23:46:00,401 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:00,428 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:00,436 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:00,459 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:00,465 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:00,468 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:00,480 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:00,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:00,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:00,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:00,862 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:00,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215917066] [2021-05-02 23:46:00,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1215917066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:00,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:00,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:46:00,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112642072] [2021-05-02 23:46:00,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:46:00,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:00,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:46:00,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:46:00,864 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:01,318 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 23:46:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:46:01,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (3), 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 21 [2021-05-02 23:46:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:01,320 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:46:01,320 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 23:46:01,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 595.7ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:46:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 23:46:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 23:46:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-05-02 23:46:01,326 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-05-02 23:46:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:01,326 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-05-02 23:46:01,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-05-02 23:46:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:46:01,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:01,327 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:01,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:46:01,327 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1325219532, now seen corresponding path program 3 times [2021-05-02 23:46:01,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:01,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006416698] [2021-05-02 23:46:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:01,340 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_37 2) 0) (< (+ v_main_~i~0_37 1) (* 2 v_main_~k~0_16))) InVars {main_~i~0=v_main_~i~0_37, main_~k~0=v_main_~k~0_16} OutVars{main_~i~0=v_main_~i~0_37, main_~k~0=v_main_~k~0_16} AuxVars[] AssignedVars[] [2021-05-02 23:46:01,345 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:01,347 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,351 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,377 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:01,380 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:01,403 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:01,422 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= 0 (mod v_main_~i~0_39 2))) (< (+ v_main_~i~0_39 1) (* 2 v_main_~k~0_17))) InVars {main_~i~0=v_main_~i~0_39, main_~k~0=v_main_~k~0_17} OutVars{main_~i~0=v_main_~i~0_39, main_~k~0=v_main_~k~0_17} AuxVars[] AssignedVars[] [2021-05-02 23:46:01,427 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:01,450 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,456 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,467 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:01,470 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:01,473 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:01,484 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:01,491 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_41 2) 0)) (< v_main_~i~0_41 (* 2 v_main_~k~0_18))) InVars {main_~i~0=v_main_~i~0_41, main_~k~0=v_main_~k~0_18} OutVars{main_~i~0=v_main_~i~0_41, main_~k~0=v_main_~k~0_18} AuxVars[] AssignedVars[] [2021-05-02 23:46:01,496 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:01,499 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,503 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,517 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:01,520 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:01,539 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:01,555 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_43 (* 2 v_main_~k~0_19)) (= (mod v_main_~i~0_43 2) 0)) InVars {main_~i~0=v_main_~i~0_43, main_~k~0=v_main_~k~0_19} OutVars{main_~i~0=v_main_~i~0_43, main_~k~0=v_main_~k~0_19} AuxVars[] AssignedVars[] [2021-05-02 23:46:01,559 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:01,561 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,565 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:01,614 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:01,617 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:01,639 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:01,653 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:01,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:01,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:01,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:02,108 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:02,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006416698] [2021-05-02 23:46:02,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006416698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:02,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:02,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:46:02,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722304389] [2021-05-02 23:46:02,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:46:02,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:46:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:46:02,110 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:02,624 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-02 23:46:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:46:02,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 23:46:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:02,626 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:46:02,626 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 23:46:02,626 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:46:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 23:46:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 23:46:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 23:46:02,632 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2021-05-02 23:46:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:02,633 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 23:46:02,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 23:46:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 23:46:02,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:02,634 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:02,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:46:02,634 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:02,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:02,634 INFO L82 PathProgramCache]: Analyzing trace with hash 356674989, now seen corresponding path program 4 times [2021-05-02 23:46:02,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:02,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627691800] [2021-05-02 23:46:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:02,646 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_51 1) (* 2 v_main_~k~0_20)) (= (mod v_main_~i~0_51 2) 0)) InVars {main_~i~0=v_main_~i~0_51, main_~k~0=v_main_~k~0_20} OutVars{main_~i~0=v_main_~i~0_51, main_~k~0=v_main_~k~0_20} AuxVars[] AssignedVars[] [2021-05-02 23:46:02,649 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:02,672 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,675 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,697 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:02,700 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:02,702 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:02,714 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_53 2) 0)) (< (+ v_main_~i~0_53 1) (* 2 v_main_~k~0_21))) InVars {main_~i~0=v_main_~i~0_53, main_~k~0=v_main_~k~0_21} OutVars{main_~i~0=v_main_~i~0_53, main_~k~0=v_main_~k~0_21} AuxVars[] AssignedVars[] [2021-05-02 23:46:02,718 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:02,731 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,735 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,744 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:02,746 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:02,748 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:02,756 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:02,760 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_55 2) 0)) (< v_main_~i~0_55 (* 2 v_main_~k~0_22))) InVars {main_~i~0=v_main_~i~0_55, main_~k~0=v_main_~k~0_22} OutVars{main_~i~0=v_main_~i~0_55, main_~k~0=v_main_~k~0_22} AuxVars[] AssignedVars[] [2021-05-02 23:46:02,762 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:02,778 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,781 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,790 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:02,792 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:02,794 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:02,806 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_57 (* 2 v_main_~k~0_23)) (= (mod v_main_~i~0_57 2) 0)) InVars {main_~i~0=v_main_~i~0_57, main_~k~0=v_main_~k~0_23} OutVars{main_~i~0=v_main_~i~0_57, main_~k~0=v_main_~k~0_23} AuxVars[] AssignedVars[] [2021-05-02 23:46:02,809 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:02,850 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,853 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:02,876 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:02,879 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:02,881 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:02,893 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:03,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:03,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:03,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:03,605 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:03,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627691800] [2021-05-02 23:46:03,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627691800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:03,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:03,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:46:03,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419266429] [2021-05-02 23:46:03,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:46:03,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:03,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:46:03,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:46:03,607 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:04,313 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-02 23:46:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:46:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 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 27 [2021-05-02 23:46:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:04,314 INFO L225 Difference]: With dead ends: 41 [2021-05-02 23:46:04,314 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 23:46:04,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 996.0ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:46:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 23:46:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 23:46:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:04,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-02 23:46:04,322 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-05-02 23:46:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:04,322 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-02 23:46:04,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-02 23:46:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:46:04,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:04,323 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:04,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:46:04,323 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:04,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1932084970, now seen corresponding path program 5 times [2021-05-02 23:46:04,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:04,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180356350] [2021-05-02 23:46:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:04,334 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_66 1) (* 2 v_main_~k~0_24)) (= (mod v_main_~i~0_66 2) 0)) InVars {main_~i~0=v_main_~i~0_66, main_~k~0=v_main_~k~0_24} OutVars{main_~i~0=v_main_~i~0_66, main_~k~0=v_main_~k~0_24} AuxVars[] AssignedVars[] [2021-05-02 23:46:04,337 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:04,338 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,341 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,363 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:04,366 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:04,384 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:04,401 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_68 2) 0)) (< (+ v_main_~i~0_68 1) (* 2 v_main_~k~0_25))) InVars {main_~i~0=v_main_~i~0_68, main_~k~0=v_main_~k~0_25} OutVars{main_~i~0=v_main_~i~0_68, main_~k~0=v_main_~k~0_25} AuxVars[] AssignedVars[] [2021-05-02 23:46:04,403 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:04,405 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,408 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,415 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:04,417 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:04,429 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:04,437 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:04,440 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_70 (* 2 v_main_~k~0_26)) (not (= (mod v_main_~i~0_70 2) 0))) InVars {main_~i~0=v_main_~i~0_70, main_~k~0=v_main_~k~0_26} OutVars{main_~i~0=v_main_~i~0_70, main_~k~0=v_main_~k~0_26} AuxVars[] AssignedVars[] [2021-05-02 23:46:04,442 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:04,443 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,447 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,459 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:04,462 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:04,477 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:04,491 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_72 (* 2 v_main_~k~0_27)) (= (mod v_main_~i~0_72 2) 0)) InVars {main_~i~0=v_main_~i~0_72, main_~k~0=v_main_~k~0_27} OutVars{main_~i~0=v_main_~i~0_72, main_~k~0=v_main_~k~0_27} AuxVars[] AssignedVars[] [2021-05-02 23:46:04,499 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:04,501 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,504 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:04,528 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:04,531 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:04,548 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:04,560 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:04,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:04,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:04,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:05,201 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:05,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180356350] [2021-05-02 23:46:05,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [180356350] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:05,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:05,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:46:05,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641841128] [2021-05-02 23:46:05,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:46:05,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:05,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:46:05,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:46:05,203 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:06,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:06,038 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-05-02 23:46:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:46:06,039 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 23:46:06,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:06,040 INFO L225 Difference]: With dead ends: 43 [2021-05-02 23:46:06,040 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 23:46:06,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1034.8ms TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:46:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 23:46:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 23:46:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 23:46:06,049 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2021-05-02 23:46:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:06,049 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 23:46:06,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 23:46:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 23:46:06,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:06,050 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:06,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:46:06,051 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:06,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1254239605, now seen corresponding path program 6 times [2021-05-02 23:46:06,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:06,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081783524] [2021-05-02 23:46:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:06,061 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_82 2) 0) (< (+ v_main_~i~0_82 1) (* 2 v_main_~k~0_28))) InVars {main_~i~0=v_main_~i~0_82, main_~k~0=v_main_~k~0_28} OutVars{main_~i~0=v_main_~i~0_82, main_~k~0=v_main_~k~0_28} AuxVars[] AssignedVars[] [2021-05-02 23:46:06,064 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:06,087 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:06,090 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:06,116 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:06,120 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:06,122 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:06,137 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_84 1) (* 2 v_main_~k~0_29)) (not (= (mod v_main_~i~0_84 2) 0))) InVars {main_~i~0=v_main_~i~0_84, main_~k~0=v_main_~k~0_29} OutVars{main_~i~0=v_main_~i~0_84, main_~k~0=v_main_~k~0_29} AuxVars[] AssignedVars[] [2021-05-02 23:46:06,147 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:06,166 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:06,176 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:06,189 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:06,191 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:06,193 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:06,203 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:06,206 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_86 (* 2 v_main_~k~0_30)) (not (= (mod v_main_~i~0_86 2) 0))) InVars {main_~i~0=v_main_~i~0_86, main_~k~0=v_main_~k~0_30} OutVars{main_~i~0=v_main_~i~0_86, main_~k~0=v_main_~k~0_30} AuxVars[] AssignedVars[] [2021-05-02 23:46:06,209 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:06,229 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:06,232 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:06,248 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:06,251 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:06,253 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:06,265 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_88 2) 0) (< v_main_~i~0_88 (* 2 v_main_~k~0_31))) InVars {main_~i~0=v_main_~i~0_88, main_~k~0=v_main_~k~0_31} OutVars{main_~i~0=v_main_~i~0_88, main_~k~0=v_main_~k~0_31} AuxVars[] AssignedVars[] [2021-05-02 23:46:06,269 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:06,271 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:06,274 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:06,298 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:06,301 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:06,324 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:06,335 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:06,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:06,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:07,326 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:07,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081783524] [2021-05-02 23:46:07,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081783524] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:07,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:07,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:46:07,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155658263] [2021-05-02 23:46:07,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:46:07,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:07,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:46:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:46:07,329 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:08,365 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-02 23:46:08,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:46:08,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (3), 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 33 [2021-05-02 23:46:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:08,367 INFO L225 Difference]: With dead ends: 47 [2021-05-02 23:46:08,367 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 23:46:08,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1540.4ms TimeCoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:46:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 23:46:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 23:46:08,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:08,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-05-02 23:46:08,378 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-05-02 23:46:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:08,378 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-05-02 23:46:08,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-05-02 23:46:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:46:08,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:08,379 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:08,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:46:08,380 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:08,380 INFO L82 PathProgramCache]: Analyzing trace with hash -724189320, now seen corresponding path program 7 times [2021-05-02 23:46:08,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:08,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353970188] [2021-05-02 23:46:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:08,389 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_99 2) 0) (< (+ v_main_~i~0_99 1) (* 2 v_main_~k~0_32))) InVars {main_~i~0=v_main_~i~0_99, main_~k~0=v_main_~k~0_32} OutVars{main_~i~0=v_main_~i~0_99, main_~k~0=v_main_~k~0_32} AuxVars[] AssignedVars[] [2021-05-02 23:46:08,392 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:08,394 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:08,396 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:08,416 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:08,419 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:08,435 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:08,448 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_101 1) (* 2 v_main_~k~0_33)) (not (= (mod v_main_~i~0_101 2) 0))) InVars {main_~i~0=v_main_~i~0_101, main_~k~0=v_main_~k~0_33} OutVars{main_~i~0=v_main_~i~0_101, main_~k~0=v_main_~k~0_33} AuxVars[] AssignedVars[] [2021-05-02 23:46:08,450 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:08,464 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:08,466 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:08,476 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:08,478 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:08,480 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:08,487 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:08,489 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_103 (* 2 v_main_~k~0_34)) (not (= (mod v_main_~i~0_103 2) 0))) InVars {main_~i~0=v_main_~i~0_103, main_~k~0=v_main_~k~0_34} OutVars{main_~i~0=v_main_~i~0_103, main_~k~0=v_main_~k~0_34} AuxVars[] AssignedVars[] [2021-05-02 23:46:08,491 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:08,503 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:08,505 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:08,512 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:08,514 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:08,516 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:08,525 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_105 (* 2 v_main_~k~0_35)) (= (mod v_main_~i~0_105 2) 0)) InVars {main_~i~0=v_main_~i~0_105, main_~k~0=v_main_~k~0_35} OutVars{main_~i~0=v_main_~i~0_105, main_~k~0=v_main_~k~0_35} AuxVars[] AssignedVars[] [2021-05-02 23:46:08,527 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:08,545 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:08,548 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:08,564 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:08,566 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:08,568 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:08,580 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:08,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:08,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:08,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:09,451 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:09,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353970188] [2021-05-02 23:46:09,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [353970188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:09,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:09,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:46:09,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700644539] [2021-05-02 23:46:09,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:46:09,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:09,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:46:09,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:46:09,453 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:10,484 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-02 23:46:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:46:10,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 23:46:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:10,487 INFO L225 Difference]: With dead ends: 49 [2021-05-02 23:46:10,487 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 23:46:10,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1474.2ms TimeCoverageRelationStatistics Valid=138, Invalid=1584, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:46:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 23:46:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 23:46:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-02 23:46:10,523 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2021-05-02 23:46:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:10,523 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-02 23:46:10,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-02 23:46:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 23:46:10,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:10,524 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:10,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:46:10,524 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash -70936343, now seen corresponding path program 8 times [2021-05-02 23:46:10,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:10,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662529059] [2021-05-02 23:46:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:10,533 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_117 1) (* 2 v_main_~k~0_36)) (= (mod v_main_~i~0_117 2) 0)) InVars {main_~i~0=v_main_~i~0_117, main_~k~0=v_main_~k~0_36} OutVars{main_~i~0=v_main_~i~0_117, main_~k~0=v_main_~k~0_36} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,536 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:10,537 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,539 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,562 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:10,565 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:10,580 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:10,602 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_119 2) 0)) (< (+ v_main_~i~0_119 1) (* 2 v_main_~k~0_37))) InVars {main_~i~0=v_main_~i~0_119, main_~k~0=v_main_~k~0_37} OutVars{main_~i~0=v_main_~i~0_119, main_~k~0=v_main_~k~0_37} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,604 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:10,606 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,608 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,615 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:10,617 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:10,627 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:10,635 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:10,637 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_121 2) 0)) (< v_main_~i~0_121 (* 2 v_main_~k~0_38))) InVars {main_~i~0=v_main_~i~0_121, main_~k~0=v_main_~k~0_38} OutVars{main_~i~0=v_main_~i~0_121, main_~k~0=v_main_~k~0_38} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,639 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:10,640 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,642 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,648 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:10,650 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:10,660 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:10,670 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= 0 (mod v_main_~i~0_123 2)) (< v_main_~i~0_123 (* 2 v_main_~k~0_39))) InVars {main_~i~0=v_main_~i~0_123, main_~k~0=v_main_~k~0_39} OutVars{main_~i~0=v_main_~i~0_123, main_~k~0=v_main_~k~0_39} AuxVars[] AssignedVars[] [2021-05-02 23:46:10,672 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:10,673 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,675 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:10,693 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:10,695 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:10,710 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:10,720 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:10,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:10,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:10,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:11,721 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:11,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662529059] [2021-05-02 23:46:11,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [662529059] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:11,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:11,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:46:11,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181245290] [2021-05-02 23:46:11,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:46:11,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:11,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:46:11,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:46:11,723 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:13,083 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-05-02 23:46:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:46:13,084 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 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 39 [2021-05-02 23:46:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:13,085 INFO L225 Difference]: With dead ends: 53 [2021-05-02 23:46:13,085 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 23:46:13,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1788.0ms TimeCoverageRelationStatistics Valid=159, Invalid=2097, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:46:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 23:46:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-05-02 23:46:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-05-02 23:46:13,111 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2021-05-02 23:46:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:13,111 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-05-02 23:46:13,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-05-02 23:46:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:46:13,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:13,112 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:13,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:46:13,112 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2028276646, now seen corresponding path program 9 times [2021-05-02 23:46:13,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:13,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837544545] [2021-05-02 23:46:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:13,124 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_136 1) (* 2 v_main_~k~0_40)) (= (mod v_main_~i~0_136 2) 0)) InVars {main_~i~0=v_main_~i~0_136, main_~k~0=v_main_~k~0_40} OutVars{main_~i~0=v_main_~i~0_136, main_~k~0=v_main_~k~0_40} AuxVars[] AssignedVars[] [2021-05-02 23:46:13,126 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:13,127 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,129 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,150 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:13,153 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:13,171 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:13,184 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_138 2) 0)) (< (+ v_main_~i~0_138 1) (* 2 v_main_~k~0_41))) InVars {main_~i~0=v_main_~i~0_138, main_~k~0=v_main_~k~0_41} OutVars{main_~i~0=v_main_~i~0_138, main_~k~0=v_main_~k~0_41} AuxVars[] AssignedVars[] [2021-05-02 23:46:13,185 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:13,186 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,188 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,205 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:13,207 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:13,218 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:13,225 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:13,227 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_140 2) 0)) (< v_main_~i~0_140 (* 2 v_main_~k~0_42))) InVars {main_~i~0=v_main_~i~0_140, main_~k~0=v_main_~k~0_42} OutVars{main_~i~0=v_main_~i~0_140, main_~k~0=v_main_~k~0_42} AuxVars[] AssignedVars[] [2021-05-02 23:46:13,229 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:13,230 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,231 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,242 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:13,244 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:13,253 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:13,262 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_142 (* 2 v_main_~k~0_43)) (= (mod v_main_~i~0_142 2) 0)) InVars {main_~i~0=v_main_~i~0_142, main_~k~0=v_main_~k~0_43} OutVars{main_~i~0=v_main_~i~0_142, main_~k~0=v_main_~k~0_43} AuxVars[] AssignedVars[] [2021-05-02 23:46:13,264 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:13,283 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,285 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:13,306 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:13,308 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:13,311 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:13,325 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:13,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:13,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:14,168 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:14,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837544545] [2021-05-02 23:46:14,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837544545] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:14,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:14,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:46:14,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188811310] [2021-05-02 23:46:14,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:46:14,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:46:14,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:46:14,170 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:14,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:14,856 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-05-02 23:46:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:46:14,857 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 23:46:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:14,861 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:46:14,861 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 23:46:14,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1142.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:46:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 23:46:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-05-02 23:46:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-05-02 23:46:14,879 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2021-05-02 23:46:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:14,879 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-05-02 23:46:14,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-05-02 23:46:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 23:46:14,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:14,882 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:14,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:46:14,883 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:14,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2137694407, now seen corresponding path program 10 times [2021-05-02 23:46:14,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:14,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253073791] [2021-05-02 23:46:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:14,891 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_156 2) 0) (< (+ v_main_~i~0_156 1) (* 2 v_main_~k~0_44))) InVars {main_~i~0=v_main_~i~0_156, main_~k~0=v_main_~k~0_44} OutVars{main_~i~0=v_main_~i~0_156, main_~k~0=v_main_~k~0_44} AuxVars[] AssignedVars[] [2021-05-02 23:46:14,894 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:14,895 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:14,898 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:14,918 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:14,921 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:14,937 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:14,952 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_158 2) 0)) (< (+ v_main_~i~0_158 1) (* 2 v_main_~k~0_45))) InVars {main_~i~0=v_main_~i~0_158, main_~k~0=v_main_~k~0_45} OutVars{main_~i~0=v_main_~i~0_158, main_~k~0=v_main_~k~0_45} AuxVars[] AssignedVars[] [2021-05-02 23:46:14,954 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:14,955 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:14,958 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:14,966 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:14,968 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:14,979 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:14,987 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:14,988 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_160 2) 0)) (< v_main_~i~0_160 (* 2 v_main_~k~0_46))) InVars {main_~i~0=v_main_~i~0_160, main_~k~0=v_main_~k~0_46} OutVars{main_~i~0=v_main_~i~0_160, main_~k~0=v_main_~k~0_46} AuxVars[] AssignedVars[] [2021-05-02 23:46:14,990 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:14,991 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:14,994 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:15,003 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:15,005 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:15,014 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:15,023 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_162 (* 2 v_main_~k~0_47)) (= (mod v_main_~i~0_162 2) 0)) InVars {main_~i~0=v_main_~i~0_162, main_~k~0=v_main_~k~0_47} OutVars{main_~i~0=v_main_~i~0_162, main_~k~0=v_main_~k~0_47} AuxVars[] AssignedVars[] [2021-05-02 23:46:15,025 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:15,026 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:15,027 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:15,058 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:15,061 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:15,074 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:15,082 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:15,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:15,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:15,585 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:15,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253073791] [2021-05-02 23:46:15,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [253073791] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:15,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:15,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:46:15,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296513137] [2021-05-02 23:46:15,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:46:15,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:46:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:46:15,587 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:16,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:16,337 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2021-05-02 23:46:16,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:46:16,337 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 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 45 [2021-05-02 23:46:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:16,338 INFO L225 Difference]: With dead ends: 63 [2021-05-02 23:46:16,338 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 23:46:16,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 17 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 811.5ms TimeCoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:46:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 23:46:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2021-05-02 23:46:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-05-02 23:46:16,350 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2021-05-02 23:46:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:16,351 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-05-02 23:46:16,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-05-02 23:46:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:46:16,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:16,357 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:16,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:46:16,357 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash 686389180, now seen corresponding path program 11 times [2021-05-02 23:46:16,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:16,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259106784] [2021-05-02 23:46:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:16,372 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_177 1) (* 2 v_main_~k~0_48)) (= (mod v_main_~i~0_177 2) 0)) InVars {main_~i~0=v_main_~i~0_177, main_~k~0=v_main_~k~0_48} OutVars{main_~i~0=v_main_~i~0_177, main_~k~0=v_main_~k~0_48} AuxVars[] AssignedVars[] [2021-05-02 23:46:16,374 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:16,394 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:16,396 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:16,421 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:16,425 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:16,427 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:16,442 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_179 2) 0)) (< (+ v_main_~i~0_179 1) (* 2 v_main_~k~0_49))) InVars {main_~i~0=v_main_~i~0_179, main_~k~0=v_main_~k~0_49} OutVars{main_~i~0=v_main_~i~0_179, main_~k~0=v_main_~k~0_49} AuxVars[] AssignedVars[] [2021-05-02 23:46:16,444 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:16,457 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:16,464 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:16,473 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:16,476 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:16,478 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:16,492 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:16,495 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_181 2) 0)) (< v_main_~i~0_181 (* 2 v_main_~k~0_50))) InVars {main_~i~0=v_main_~i~0_181, main_~k~0=v_main_~k~0_50} OutVars{main_~i~0=v_main_~i~0_181, main_~k~0=v_main_~k~0_50} AuxVars[] AssignedVars[] [2021-05-02 23:46:16,497 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:16,518 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:16,522 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:16,531 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:16,534 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:16,536 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:16,547 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_183 (* 2 v_main_~k~0_51)) (= (mod v_main_~i~0_183 2) 0)) InVars {main_~i~0=v_main_~i~0_183, main_~k~0=v_main_~k~0_51} OutVars{main_~i~0=v_main_~i~0_183, main_~k~0=v_main_~k~0_51} AuxVars[] AssignedVars[] [2021-05-02 23:46:16,549 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:16,550 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:16,553 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:16,577 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:16,580 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:16,599 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:16,611 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:16,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:16,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:16,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:18,197 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:18,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259106784] [2021-05-02 23:46:18,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [259106784] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:18,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:18,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:46:18,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610492043] [2021-05-02 23:46:18,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:46:18,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:18,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:46:18,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:46:18,199 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:20,072 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-05-02 23:46:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:46:20,072 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 23:46:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:20,073 INFO L225 Difference]: With dead ends: 61 [2021-05-02 23:46:20,073 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 23:46:20,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2609.5ms TimeCoverageRelationStatistics Valid=192, Invalid=3114, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:46:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 23:46:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 23:46:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 23:46:20,082 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2021-05-02 23:46:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:20,082 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 23:46:20,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 30 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 23:46:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 23:46:20,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:20,083 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:20,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:46:20,086 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash 513133093, now seen corresponding path program 12 times [2021-05-02 23:46:20,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:20,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283953081] [2021-05-02 23:46:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:20,095 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_199 2) 0) (< (+ v_main_~i~0_199 1) (* 2 v_main_~k~0_52))) InVars {main_~i~0=v_main_~i~0_199, main_~k~0=v_main_~k~0_52} OutVars{main_~i~0=v_main_~i~0_199, main_~k~0=v_main_~k~0_52} AuxVars[] AssignedVars[] [2021-05-02 23:46:20,097 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:20,118 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:20,120 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:20,148 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:20,151 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:20,153 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:20,166 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_201 2) 0)) (< (+ v_main_~i~0_201 1) (* 2 v_main_~k~0_53))) InVars {main_~i~0=v_main_~i~0_201, main_~k~0=v_main_~k~0_53} OutVars{main_~i~0=v_main_~i~0_201, main_~k~0=v_main_~k~0_53} AuxVars[] AssignedVars[] [2021-05-02 23:46:20,168 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:20,169 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:20,170 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:20,178 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:20,180 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:20,193 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:20,203 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:20,205 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_203 2) 0)) (< v_main_~i~0_203 (* 2 v_main_~k~0_54))) InVars {main_~i~0=v_main_~i~0_203, main_~k~0=v_main_~k~0_54} OutVars{main_~i~0=v_main_~i~0_203, main_~k~0=v_main_~k~0_54} AuxVars[] AssignedVars[] [2021-05-02 23:46:20,207 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:20,223 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:20,225 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:20,234 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:20,236 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:20,238 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:20,248 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_205 (* 2 v_main_~k~0_55)) (= (mod v_main_~i~0_205 2) 0)) InVars {main_~i~0=v_main_~i~0_205, main_~k~0=v_main_~k~0_55} OutVars{main_~i~0=v_main_~i~0_205, main_~k~0=v_main_~k~0_55} AuxVars[] AssignedVars[] [2021-05-02 23:46:20,250 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:20,251 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:20,253 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:20,272 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:20,275 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:20,292 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:20,303 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:20,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:20,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:20,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:22,044 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:22,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283953081] [2021-05-02 23:46:22,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283953081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:22,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:22,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:46:22,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102955945] [2021-05-02 23:46:22,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:46:22,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:22,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:46:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:46:22,046 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:24,276 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-05-02 23:46:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:46:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (3), 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 51 [2021-05-02 23:46:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:24,278 INFO L225 Difference]: With dead ends: 65 [2021-05-02 23:46:24,278 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 23:46:24,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 13 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 3062.4ms TimeCoverageRelationStatistics Valid=213, Invalid=3819, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:46:24,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 23:46:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-05-02 23:46:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-05-02 23:46:24,289 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2021-05-02 23:46:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:24,290 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-05-02 23:46:24,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-05-02 23:46:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:46:24,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:24,291 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:24,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:46:24,291 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:24,291 INFO L82 PathProgramCache]: Analyzing trace with hash -928224866, now seen corresponding path program 13 times [2021-05-02 23:46:24,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:24,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975834089] [2021-05-02 23:46:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:24,302 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_222 2) 0) (< (+ v_main_~i~0_222 1) (* 2 v_main_~k~0_56))) InVars {main_~i~0=v_main_~i~0_222, main_~k~0=v_main_~k~0_56} OutVars{main_~i~0=v_main_~i~0_222, main_~k~0=v_main_~k~0_56} AuxVars[] AssignedVars[] [2021-05-02 23:46:24,304 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:24,305 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,308 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,330 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:24,333 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:24,359 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:24,374 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_224 2) 0)) (< (+ v_main_~i~0_224 1) (* 2 v_main_~k~0_57))) InVars {main_~i~0=v_main_~i~0_224, main_~k~0=v_main_~k~0_57} OutVars{main_~i~0=v_main_~i~0_224, main_~k~0=v_main_~k~0_57} AuxVars[] AssignedVars[] [2021-05-02 23:46:24,376 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:24,391 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,394 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,401 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:24,404 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:24,406 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:24,415 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:24,418 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_226 2) 0)) (< v_main_~i~0_226 (* 2 v_main_~k~0_58))) InVars {main_~i~0=v_main_~i~0_226, main_~k~0=v_main_~k~0_58} OutVars{main_~i~0=v_main_~i~0_226, main_~k~0=v_main_~k~0_58} AuxVars[] AssignedVars[] [2021-05-02 23:46:24,421 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:24,437 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,441 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,448 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:24,451 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:24,453 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:24,463 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_228 2) 0) (< v_main_~i~0_228 (* 2 v_main_~k~0_59))) InVars {main_~i~0=v_main_~i~0_228, main_~k~0=v_main_~k~0_59} OutVars{main_~i~0=v_main_~i~0_228, main_~k~0=v_main_~k~0_59} AuxVars[] AssignedVars[] [2021-05-02 23:46:24,465 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:24,466 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,468 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:24,489 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:24,492 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:24,510 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:24,522 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:24,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:24,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:24,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:26,563 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975834089] [2021-05-02 23:46:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [975834089] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:26,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:26,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:46:26,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955064265] [2021-05-02 23:46:26,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:46:26,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:26,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:46:26,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:46:26,565 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 36 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 34 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:28,962 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-05-02 23:46:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:46:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 34 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 23:46:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:28,964 INFO L225 Difference]: With dead ends: 67 [2021-05-02 23:46:28,964 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 23:46:28,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 16 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3440.0ms TimeCoverageRelationStatistics Valid=219, Invalid=4071, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:46:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 23:46:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 23:46:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-05-02 23:46:28,973 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2021-05-02 23:46:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:28,973 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-05-02 23:46:28,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 34 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-05-02 23:46:28,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 23:46:28,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:28,974 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:28,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:46:28,974 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1115163389, now seen corresponding path program 14 times [2021-05-02 23:46:28,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:28,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974494566] [2021-05-02 23:46:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:28,994 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_246 1) (* 2 v_main_~k~0_60)) (= (mod v_main_~i~0_246 2) 0)) InVars {main_~i~0=v_main_~i~0_246, main_~k~0=v_main_~k~0_60} OutVars{main_~i~0=v_main_~i~0_246, main_~k~0=v_main_~k~0_60} AuxVars[] AssignedVars[] [2021-05-02 23:46:28,996 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:28,997 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,000 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,022 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:29,025 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:29,043 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:29,057 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_248 2) 0)) (< (+ v_main_~i~0_248 1) (* 2 v_main_~k~0_61))) InVars {main_~i~0=v_main_~i~0_248, main_~k~0=v_main_~k~0_61} OutVars{main_~i~0=v_main_~i~0_248, main_~k~0=v_main_~k~0_61} AuxVars[] AssignedVars[] [2021-05-02 23:46:29,059 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:29,074 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,077 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,084 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:29,087 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:29,090 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:29,100 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:29,102 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_250 (* 2 v_main_~k~0_62)) (not (= (mod v_main_~i~0_250 2) 0))) InVars {main_~i~0=v_main_~i~0_250, main_~k~0=v_main_~k~0_62} OutVars{main_~i~0=v_main_~i~0_250, main_~k~0=v_main_~k~0_62} AuxVars[] AssignedVars[] [2021-05-02 23:46:29,104 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:29,106 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,108 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,119 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:29,122 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:29,134 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:29,148 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_252 (* 2 v_main_~k~0_63)) (= (mod v_main_~i~0_252 2) 0)) InVars {main_~i~0=v_main_~i~0_252, main_~k~0=v_main_~k~0_63} OutVars{main_~i~0=v_main_~i~0_252, main_~k~0=v_main_~k~0_63} AuxVars[] AssignedVars[] [2021-05-02 23:46:29,151 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:29,153 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,156 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:29,181 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:29,184 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:29,203 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:29,216 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:29,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:29,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:29,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:31,380 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:31,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974494566] [2021-05-02 23:46:31,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974494566] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:31,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:31,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:46:31,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592150549] [2021-05-02 23:46:31,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:46:31,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:46:31,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1468, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:46:31,382 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 37 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:34,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:34,066 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-05-02 23:46:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:46:34,066 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 37 states have internal predecessors, (53), 2 states have call successors, (3), 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 57 [2021-05-02 23:46:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:34,068 INFO L225 Difference]: With dead ends: 71 [2021-05-02 23:46:34,068 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 23:46:34,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 15 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 3735.2ms TimeCoverageRelationStatistics Valid=240, Invalid=4872, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:46:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 23:46:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-02 23:46:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-05-02 23:46:34,084 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2021-05-02 23:46:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:34,084 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-05-02 23:46:34,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 37 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-05-02 23:46:34,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:46:34,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:34,085 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:34,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:46:34,085 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2146888192, now seen corresponding path program 15 times [2021-05-02 23:46:34,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:34,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185825627] [2021-05-02 23:46:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:34,100 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_271 1) (* 2 v_main_~k~0_64)) (= (mod v_main_~i~0_271 2) 0)) InVars {main_~i~0=v_main_~i~0_271, main_~k~0=v_main_~k~0_64} OutVars{main_~i~0=v_main_~i~0_271, main_~k~0=v_main_~k~0_64} AuxVars[] AssignedVars[] [2021-05-02 23:46:34,110 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:34,134 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,137 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,160 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:34,163 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:34,166 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:34,181 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_273 2) 0)) (< (+ v_main_~i~0_273 1) (* 2 v_main_~k~0_65))) InVars {main_~i~0=v_main_~i~0_273, main_~k~0=v_main_~k~0_65} OutVars{main_~i~0=v_main_~i~0_273, main_~k~0=v_main_~k~0_65} AuxVars[] AssignedVars[] [2021-05-02 23:46:34,183 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:34,185 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,187 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,194 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:34,197 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:34,211 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:34,221 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:34,224 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_275 (* 2 v_main_~k~0_66)) (not (= (mod v_main_~i~0_275 2) 0))) InVars {main_~i~0=v_main_~i~0_275, main_~k~0=v_main_~k~0_66} OutVars{main_~i~0=v_main_~i~0_275, main_~k~0=v_main_~k~0_66} AuxVars[] AssignedVars[] [2021-05-02 23:46:34,226 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:34,243 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,246 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,258 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:34,261 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:34,264 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:34,277 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_277 2) 0) (< v_main_~i~0_277 (* 2 v_main_~k~0_67))) InVars {main_~i~0=v_main_~i~0_277, main_~k~0=v_main_~k~0_67} OutVars{main_~i~0=v_main_~i~0_277, main_~k~0=v_main_~k~0_67} AuxVars[] AssignedVars[] [2021-05-02 23:46:34,280 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:34,307 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,309 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:34,332 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:34,335 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:34,338 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:34,352 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:34,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:34,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:34,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:37,117 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:37,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185825627] [2021-05-02 23:46:37,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185825627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:37,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:37,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:46:37,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103391961] [2021-05-02 23:46:37,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:46:37,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:37,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:46:37,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1546, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:46:37,119 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 38 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:40,448 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-05-02 23:46:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:46:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 38 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 23:46:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:40,449 INFO L225 Difference]: With dead ends: 73 [2021-05-02 23:46:40,449 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 23:46:40,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 18 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4683.4ms TimeCoverageRelationStatistics Valid=246, Invalid=5156, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:46:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 23:46:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 23:46:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-05-02 23:46:40,461 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2021-05-02 23:46:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:40,461 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-05-02 23:46:40,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 38 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-05-02 23:46:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 23:46:40,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:40,462 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:40,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:46:40,462 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2074476191, now seen corresponding path program 16 times [2021-05-02 23:46:40,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:40,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007556458] [2021-05-02 23:46:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:40,486 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_297 2) 0) (< (+ v_main_~i~0_297 1) (* 2 v_main_~k~0_68))) InVars {main_~i~0=v_main_~i~0_297, main_~k~0=v_main_~k~0_68} OutVars{main_~i~0=v_main_~i~0_297, main_~k~0=v_main_~k~0_68} AuxVars[] AssignedVars[] [2021-05-02 23:46:40,488 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:40,488 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:40,491 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:40,514 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:40,517 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:40,533 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:40,545 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_299 1) (* 2 v_main_~k~0_69)) (not (= (mod v_main_~i~0_299 2) 0))) InVars {main_~i~0=v_main_~i~0_299, main_~k~0=v_main_~k~0_69} OutVars{main_~i~0=v_main_~i~0_299, main_~k~0=v_main_~k~0_69} AuxVars[] AssignedVars[] [2021-05-02 23:46:40,547 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:40,548 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:40,549 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:40,559 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:40,562 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:40,572 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:40,580 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:40,591 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_301 (* 2 v_main_~k~0_70)) (not (= (mod v_main_~i~0_301 2) 0))) InVars {main_~i~0=v_main_~i~0_301, main_~k~0=v_main_~k~0_70} OutVars{main_~i~0=v_main_~i~0_301, main_~k~0=v_main_~k~0_70} AuxVars[] AssignedVars[] [2021-05-02 23:46:40,592 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:40,593 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:40,596 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:40,605 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:40,607 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:40,617 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:40,642 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_303 (* 2 v_main_~k~0_71)) (= (mod v_main_~i~0_303 2) 0)) InVars {main_~i~0=v_main_~i~0_303, main_~k~0=v_main_~k~0_71} OutVars{main_~i~0=v_main_~i~0_303, main_~k~0=v_main_~k~0_71} AuxVars[] AssignedVars[] [2021-05-02 23:46:40,644 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:40,663 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:40,671 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:40,690 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:40,692 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:40,699 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:40,710 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:40,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:40,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:41,918 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007556458] [2021-05-02 23:46:41,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007556458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:41,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:41,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:46:41,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455782045] [2021-05-02 23:46:41,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:46:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:46:41,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:46:41,920 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:43,317 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2021-05-02 23:46:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:46:43,318 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 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 63 [2021-05-02 23:46:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:43,319 INFO L225 Difference]: With dead ends: 81 [2021-05-02 23:46:43,319 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 23:46:43,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 7 SyntacticMatches, 25 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1929.0ms TimeCoverageRelationStatistics Valid=286, Invalid=3496, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:46:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 23:46:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-05-02 23:46:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-05-02 23:46:43,333 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2021-05-02 23:46:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:43,333 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-05-02 23:46:43,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-05-02 23:46:43,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:46:43,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:43,334 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:43,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:46:43,334 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:43,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1971591394, now seen corresponding path program 17 times [2021-05-02 23:46:43,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:43,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838332145] [2021-05-02 23:46:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:43,343 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_324 1) (* 2 v_main_~k~0_72)) (= (mod v_main_~i~0_324 2) 0)) InVars {main_~i~0=v_main_~i~0_324, main_~k~0=v_main_~k~0_72} OutVars{main_~i~0=v_main_~i~0_324, main_~k~0=v_main_~k~0_72} AuxVars[] AssignedVars[] [2021-05-02 23:46:43,345 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:43,346 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:43,349 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:43,371 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:43,375 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:43,395 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:43,411 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_326 2) 0)) (< (+ v_main_~i~0_326 1) (* 2 v_main_~k~0_73))) InVars {main_~i~0=v_main_~i~0_326, main_~k~0=v_main_~k~0_73} OutVars{main_~i~0=v_main_~i~0_326, main_~k~0=v_main_~k~0_73} AuxVars[] AssignedVars[] [2021-05-02 23:46:43,413 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:43,414 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:43,416 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:43,423 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:43,426 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:43,438 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:43,447 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:43,449 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_328 2) 0)) (< v_main_~i~0_328 (* 2 v_main_~k~0_74))) InVars {main_~i~0=v_main_~i~0_328, main_~k~0=v_main_~k~0_74} OutVars{main_~i~0=v_main_~i~0_328, main_~k~0=v_main_~k~0_74} AuxVars[] AssignedVars[] [2021-05-02 23:46:43,451 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:43,466 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:43,468 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:43,479 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:43,482 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:43,484 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:43,495 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_330 (* 2 v_main_~k~0_75)) (= (mod v_main_~i~0_330 2) 0)) InVars {main_~i~0=v_main_~i~0_330, main_~k~0=v_main_~k~0_75} OutVars{main_~i~0=v_main_~i~0_330, main_~k~0=v_main_~k~0_75} AuxVars[] AssignedVars[] [2021-05-02 23:46:43,497 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:43,519 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:43,522 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:43,542 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:43,545 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:43,547 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:43,560 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:43,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:43,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:44,788 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:44,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838332145] [2021-05-02 23:46:44,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [838332145] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:44,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:44,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:46:44,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284350289] [2021-05-02 23:46:44,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:46:44,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:44,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:46:44,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:46:44,790 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 35 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:46,309 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-05-02 23:46:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:46:46,309 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-02 23:46:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:46,310 INFO L225 Difference]: With dead ends: 84 [2021-05-02 23:46:46,310 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 23:46:46,311 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 5 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1993.5ms TimeCoverageRelationStatistics Valid=303, Invalid=3857, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:46:46,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 23:46:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-05-02 23:46:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-05-02 23:46:46,324 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2021-05-02 23:46:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:46,324 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-05-02 23:46:46,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-05-02 23:46:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 23:46:46,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:46,330 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:46,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:46:46,330 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:46,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1661153473, now seen corresponding path program 18 times [2021-05-02 23:46:46,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:46,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074448627] [2021-05-02 23:46:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:46,352 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_352 2) 0) (< (+ v_main_~i~0_352 1) (* 2 v_main_~k~0_76))) InVars {main_~i~0=v_main_~i~0_352, main_~k~0=v_main_~k~0_76} OutVars{main_~i~0=v_main_~i~0_352, main_~k~0=v_main_~k~0_76} AuxVars[] AssignedVars[] [2021-05-02 23:46:46,355 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:46,376 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:46,378 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:46,395 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:46,397 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:46,399 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:46,412 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_354 1) (* 2 v_main_~k~0_77)) (not (= (mod v_main_~i~0_354 2) 0))) InVars {main_~i~0=v_main_~i~0_354, main_~k~0=v_main_~k~0_77} OutVars{main_~i~0=v_main_~i~0_354, main_~k~0=v_main_~k~0_77} AuxVars[] AssignedVars[] [2021-05-02 23:46:46,414 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:46,415 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:46,416 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:46,423 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:46,426 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:46,443 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:46,452 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:46,454 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_356 2) 0)) (< v_main_~i~0_356 (* 2 v_main_~k~0_78))) InVars {main_~i~0=v_main_~i~0_356, main_~k~0=v_main_~k~0_78} OutVars{main_~i~0=v_main_~i~0_356, main_~k~0=v_main_~k~0_78} AuxVars[] AssignedVars[] [2021-05-02 23:46:46,455 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:46,456 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:46,458 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:46,464 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:46,466 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:46,476 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:46,485 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_358 2) 0) (< v_main_~i~0_358 (* 2 v_main_~k~0_79))) InVars {main_~i~0=v_main_~i~0_358, main_~k~0=v_main_~k~0_79} OutVars{main_~i~0=v_main_~i~0_358, main_~k~0=v_main_~k~0_79} AuxVars[] AssignedVars[] [2021-05-02 23:46:46,487 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:46,488 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:46,489 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:46,505 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:46,507 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:46,523 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:46,535 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:46,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:46,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:46,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:49,348 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:49,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074448627] [2021-05-02 23:46:49,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2074448627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:49,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:49,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:46:49,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774077077] [2021-05-02 23:46:49,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:46:49,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:49,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:46:49,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2146, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:46:49,350 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 47 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 45 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:46:53,266 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-05-02 23:46:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:46:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 45 states have internal predecessors, (65), 2 states have call successors, (3), 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 69 [2021-05-02 23:46:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:46:53,267 INFO L225 Difference]: With dead ends: 83 [2021-05-02 23:46:53,267 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 23:46:53,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 19 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 5102.8ms TimeCoverageRelationStatistics Valid=294, Invalid=7362, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:46:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 23:46:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-05-02 23:46:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-05-02 23:46:53,278 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2021-05-02 23:46:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:46:53,278 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-05-02 23:46:53,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 45 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:46:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-05-02 23:46:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:46:53,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:46:53,279 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:46:53,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:46:53,279 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:46:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:46:53,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1597445700, now seen corresponding path program 19 times [2021-05-02 23:46:53,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:46:53,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275374919] [2021-05-02 23:46:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:46:53,287 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= 0 (mod v_main_~i~0_381 2)) (< (+ v_main_~i~0_381 1) (* 2 v_main_~k~0_80))) InVars {main_~i~0=v_main_~i~0_381, main_~k~0=v_main_~k~0_80} OutVars{main_~i~0=v_main_~i~0_381, main_~k~0=v_main_~k~0_80} AuxVars[] AssignedVars[] [2021-05-02 23:46:53,289 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:46:53,290 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:53,292 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:53,311 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:53,314 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:53,331 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:46:53,345 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_383 1) (* 2 v_main_~k~0_81)) (not (= (mod v_main_~i~0_383 2) 0))) InVars {main_~i~0=v_main_~i~0_383, main_~k~0=v_main_~k~0_81} OutVars{main_~i~0=v_main_~i~0_383, main_~k~0=v_main_~k~0_81} AuxVars[] AssignedVars[] [2021-05-02 23:46:53,346 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:46:53,359 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:53,361 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:53,371 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:46:53,373 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:46:53,375 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:46:53,384 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:53,386 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_385 2) 0)) (< v_main_~i~0_385 (* 2 v_main_~k~0_82))) InVars {main_~i~0=v_main_~i~0_385, main_~k~0=v_main_~k~0_82} OutVars{main_~i~0=v_main_~i~0_385, main_~k~0=v_main_~k~0_82} AuxVars[] AssignedVars[] [2021-05-02 23:46:53,387 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:46:53,388 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:53,389 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:53,400 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:46:53,403 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:46:53,414 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:46:53,426 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_387 2) 0) (< v_main_~i~0_387 (* 2 v_main_~k~0_83))) InVars {main_~i~0=v_main_~i~0_387, main_~k~0=v_main_~k~0_83} OutVars{main_~i~0=v_main_~i~0_387, main_~k~0=v_main_~k~0_83} AuxVars[] AssignedVars[] [2021-05-02 23:46:53,428 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:46:53,429 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:53,430 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:46:53,449 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:46:53,452 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:46:53,471 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:46:53,484 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:46:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:53,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:46:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:46:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:46:53,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:53,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:46:56,663 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:46:56,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275374919] [2021-05-02 23:46:56,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [275374919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:46:56,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:46:56,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:46:56,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690797375] [2021-05-02 23:46:56,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:46:56,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:46:56,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:46:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2240, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:46:56,665 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 46 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:01,339 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2021-05-02 23:47:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:47:01,341 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 46 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 23:47:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:01,342 INFO L225 Difference]: With dead ends: 85 [2021-05-02 23:47:01,342 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 23:47:01,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 5 SyntacticMatches, 22 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 5887.3ms TimeCoverageRelationStatistics Valid=300, Invalid=7710, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:47:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 23:47:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 23:47:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 23:47:01,352 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2021-05-02 23:47:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:01,353 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 23:47:01,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 46 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 23:47:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 23:47:01,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:01,353 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:01,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:47:01,353 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:01,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1899576989, now seen corresponding path program 20 times [2021-05-02 23:47:01,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:01,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649613905] [2021-05-02 23:47:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:01,362 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_411 1) (* 2 v_main_~k~0_84)) (= (mod v_main_~i~0_411 2) 0)) InVars {main_~i~0=v_main_~i~0_411, main_~k~0=v_main_~k~0_84} OutVars{main_~i~0=v_main_~i~0_411, main_~k~0=v_main_~k~0_84} AuxVars[] AssignedVars[] [2021-05-02 23:47:01,364 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:47:01,381 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:01,383 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:01,427 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:01,429 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:01,431 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:47:01,449 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_413 1) (* 2 v_main_~k~0_85)) (not (= (mod v_main_~i~0_413 2) 0))) InVars {main_~i~0=v_main_~i~0_413, main_~k~0=v_main_~k~0_85} OutVars{main_~i~0=v_main_~i~0_413, main_~k~0=v_main_~k~0_85} AuxVars[] AssignedVars[] [2021-05-02 23:47:01,452 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:47:01,465 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:01,466 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:01,473 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:47:01,475 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:47:01,477 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:47:01,485 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:01,487 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_415 (* 2 v_main_~k~0_86)) (not (= 0 (mod v_main_~i~0_415 2)))) InVars {main_~i~0=v_main_~i~0_415, main_~k~0=v_main_~k~0_86} OutVars{main_~i~0=v_main_~i~0_415, main_~k~0=v_main_~k~0_86} AuxVars[] AssignedVars[] [2021-05-02 23:47:01,489 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:47:01,501 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:01,502 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:01,515 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:01,517 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:01,519 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:47:01,540 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_417 2) 0) (< v_main_~i~0_417 (* 2 v_main_~k~0_87))) InVars {main_~i~0=v_main_~i~0_417, main_~k~0=v_main_~k~0_87} OutVars{main_~i~0=v_main_~i~0_417, main_~k~0=v_main_~k~0_87} AuxVars[] AssignedVars[] [2021-05-02 23:47:01,541 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:47:01,559 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:01,560 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:01,591 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:47:01,593 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:47:01,595 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:47:01,608 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:01,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:01,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:04,992 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:04,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649613905] [2021-05-02 23:47:04,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649613905] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:04,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:04,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:47:04,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019240836] [2021-05-02 23:47:04,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:47:04,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:04,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:47:04,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2533, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:47:04,993 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 51 states, 50 states have (on average 1.42) internal successors, (71), 49 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:09,606 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-05-02 23:47:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:47:09,607 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.42) internal successors, (71), 49 states have internal predecessors, (71), 2 states have call successors, (3), 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 75 [2021-05-02 23:47:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:09,607 INFO L225 Difference]: With dead ends: 89 [2021-05-02 23:47:09,607 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 23:47:09,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 5 SyntacticMatches, 21 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 6107.8ms TimeCoverageRelationStatistics Valid=321, Invalid=8799, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:47:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 23:47:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-05-02 23:47:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-05-02 23:47:09,629 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2021-05-02 23:47:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:09,629 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-05-02 23:47:09,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.42) internal successors, (71), 49 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-05-02 23:47:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:47:09,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:09,630 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:09,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:47:09,630 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2078604762, now seen corresponding path program 21 times [2021-05-02 23:47:09,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:09,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794671239] [2021-05-02 23:47:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:09,637 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_442 1) (* 2 v_main_~k~0_88)) (= (mod v_main_~i~0_442 2) 0)) InVars {main_~i~0=v_main_~i~0_442, main_~k~0=v_main_~k~0_88} OutVars{main_~i~0=v_main_~i~0_442, main_~k~0=v_main_~k~0_88} AuxVars[] AssignedVars[] [2021-05-02 23:47:09,639 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:47:09,639 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:09,641 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:09,661 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:09,664 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:09,683 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:47:09,700 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_444 1) (* 2 v_main_~k~0_89)) (not (= 0 (mod v_main_~i~0_444 2)))) InVars {main_~i~0=v_main_~i~0_444, main_~k~0=v_main_~k~0_89} OutVars{main_~i~0=v_main_~i~0_444, main_~k~0=v_main_~k~0_89} AuxVars[] AssignedVars[] [2021-05-02 23:47:09,701 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:47:09,714 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:09,716 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:09,723 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:47:09,725 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:47:09,727 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:47:09,736 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:09,738 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_446 (* 2 v_main_~k~0_90)) (not (= (mod v_main_~i~0_446 2) 0))) InVars {main_~i~0=v_main_~i~0_446, main_~k~0=v_main_~k~0_90} OutVars{main_~i~0=v_main_~i~0_446, main_~k~0=v_main_~k~0_90} AuxVars[] AssignedVars[] [2021-05-02 23:47:09,739 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:47:09,752 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:09,753 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:09,760 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:09,762 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:09,764 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:47:09,775 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_448 (* 2 v_main_~k~0_91)) (= (mod v_main_~i~0_448 2) 0)) InVars {main_~i~0=v_main_~i~0_448, main_~k~0=v_main_~k~0_91} OutVars{main_~i~0=v_main_~i~0_448, main_~k~0=v_main_~k~0_91} AuxVars[] AssignedVars[] [2021-05-02 23:47:09,776 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:47:09,778 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:09,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:09,800 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:47:09,803 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:47:09,819 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:47:09,831 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:09,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:09,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:09,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:13,543 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:13,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794671239] [2021-05-02 23:47:13,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794671239] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:13,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:13,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:47:13,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912441072] [2021-05-02 23:47:13,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:47:13,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:13,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:47:13,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2635, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:47:13,545 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 50 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:18,511 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2021-05-02 23:47:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:47:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 50 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 23:47:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:18,512 INFO L225 Difference]: With dead ends: 91 [2021-05-02 23:47:18,512 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 23:47:18,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 5 SyntacticMatches, 24 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 6582.1ms TimeCoverageRelationStatistics Valid=327, Invalid=9179, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:47:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 23:47:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 23:47:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-05-02 23:47:18,528 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2021-05-02 23:47:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:18,528 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-05-02 23:47:18,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 50 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-05-02 23:47:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 23:47:18,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:18,529 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:18,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:47:18,529 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:18,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1756376955, now seen corresponding path program 22 times [2021-05-02 23:47:18,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:18,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721406250] [2021-05-02 23:47:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:18,554 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_474 1) (* 2 v_main_~k~0_92)) (= (mod v_main_~i~0_474 2) 0)) InVars {main_~i~0=v_main_~i~0_474, main_~k~0=v_main_~k~0_92} OutVars{main_~i~0=v_main_~i~0_474, main_~k~0=v_main_~k~0_92} AuxVars[] AssignedVars[] [2021-05-02 23:47:18,558 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:47:18,559 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,562 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,601 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:18,605 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:18,639 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:47:18,673 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_476 2) 0)) (< (+ v_main_~i~0_476 1) (* 2 v_main_~k~0_93))) InVars {main_~i~0=v_main_~i~0_476, main_~k~0=v_main_~k~0_93} OutVars{main_~i~0=v_main_~i~0_476, main_~k~0=v_main_~k~0_93} AuxVars[] AssignedVars[] [2021-05-02 23:47:18,679 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:47:18,680 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,684 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,692 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:47:18,696 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:47:18,724 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:47:18,745 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:18,748 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_478 2) 0)) (< v_main_~i~0_478 (* 2 v_main_~k~0_94))) InVars {main_~i~0=v_main_~i~0_478, main_~k~0=v_main_~k~0_94} OutVars{main_~i~0=v_main_~i~0_478, main_~k~0=v_main_~k~0_94} AuxVars[] AssignedVars[] [2021-05-02 23:47:18,750 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:47:18,779 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,782 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,797 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:18,800 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:18,814 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:47:18,831 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_480 2) 0) (< v_main_~i~0_480 (* 2 v_main_~k~0_95))) InVars {main_~i~0=v_main_~i~0_480, main_~k~0=v_main_~k~0_95} OutVars{main_~i~0=v_main_~i~0_480, main_~k~0=v_main_~k~0_95} AuxVars[] AssignedVars[] [2021-05-02 23:47:18,833 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:47:18,878 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,881 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:18,933 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:47:18,937 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:47:18,940 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:47:18,967 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:19,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:19,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:25,782 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:25,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721406250] [2021-05-02 23:47:25,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [721406250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:25,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:25,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:47:25,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524478392] [2021-05-02 23:47:25,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:47:25,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:25,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:47:25,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2952, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:47:25,784 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 55 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 53 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:32,898 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-05-02 23:47:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:47:32,899 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 53 states have internal predecessors, (77), 2 states have call successors, (3), 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 81 [2021-05-02 23:47:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:32,899 INFO L225 Difference]: With dead ends: 95 [2021-05-02 23:47:32,899 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 23:47:32,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 23 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 10922.3ms TimeCoverageRelationStatistics Valid=348, Invalid=10364, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:47:32,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 23:47:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-05-02 23:47:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-05-02 23:47:32,915 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2021-05-02 23:47:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:32,915 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-05-02 23:47:32,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 53 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-05-02 23:47:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 23:47:32,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:32,916 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:32,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:47:32,916 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1046674568, now seen corresponding path program 23 times [2021-05-02 23:47:32,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:32,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451178744] [2021-05-02 23:47:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:32,926 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_507 1) (* 2 v_main_~k~0_96)) (= (mod v_main_~i~0_507 2) 0)) InVars {main_~i~0=v_main_~i~0_507, main_~k~0=v_main_~k~0_96} OutVars{main_~i~0=v_main_~i~0_507, main_~k~0=v_main_~k~0_96} AuxVars[] AssignedVars[] [2021-05-02 23:47:32,928 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:47:32,929 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:32,946 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:32,982 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:32,985 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:33,006 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:47:33,021 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_509 2) 0)) (< (+ v_main_~i~0_509 1) (* 2 v_main_~k~0_97))) InVars {main_~i~0=v_main_~i~0_509, main_~k~0=v_main_~k~0_97} OutVars{main_~i~0=v_main_~i~0_509, main_~k~0=v_main_~k~0_97} AuxVars[] AssignedVars[] [2021-05-02 23:47:33,024 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:47:33,024 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:33,026 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:33,034 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:47:33,037 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:47:33,050 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:47:33,060 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:33,063 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_511 2) 0)) (< v_main_~i~0_511 (* 2 v_main_~k~0_98))) InVars {main_~i~0=v_main_~i~0_511, main_~k~0=v_main_~k~0_98} OutVars{main_~i~0=v_main_~i~0_511, main_~k~0=v_main_~k~0_98} AuxVars[] AssignedVars[] [2021-05-02 23:47:33,064 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:47:33,080 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:33,082 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:33,089 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:33,092 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:33,094 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:47:33,106 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_513 (* 2 v_main_~k~0_99)) (= (mod v_main_~i~0_513 2) 0)) InVars {main_~i~0=v_main_~i~0_513, main_~k~0=v_main_~k~0_99} OutVars{main_~i~0=v_main_~i~0_513, main_~k~0=v_main_~k~0_99} AuxVars[] AssignedVars[] [2021-05-02 23:47:33,108 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:47:33,109 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:33,111 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:33,132 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:47:33,135 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:47:33,154 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:47:33,167 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:33,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:33,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:33,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:39,480 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:39,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451178744] [2021-05-02 23:47:39,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [451178744] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:39,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:39,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:47:39,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631249649] [2021-05-02 23:47:39,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:47:39,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:39,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:47:39,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3062, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:47:39,482 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 56 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 54 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:49,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:49,242 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-05-02 23:47:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:47:49,245 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 54 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-02 23:47:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:49,246 INFO L225 Difference]: With dead ends: 97 [2021-05-02 23:47:49,246 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 23:47:49,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 5 SyntacticMatches, 26 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2625 ImplicationChecksByTransitivity, 11748.3ms TimeCoverageRelationStatistics Valid=354, Invalid=10776, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:47:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 23:47:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 23:47:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-05-02 23:47:49,259 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2021-05-02 23:47:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:49,260 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-05-02 23:47:49,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 54 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-05-02 23:47:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 23:47:49,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:49,260 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:49,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-02 23:47:49,260 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 651854297, now seen corresponding path program 24 times [2021-05-02 23:47:49,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:49,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523936667] [2021-05-02 23:47:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:49,275 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_541 1) (* 2 v_main_~k~0_100)) (= (mod v_main_~i~0_541 2) 0)) InVars {main_~i~0=v_main_~i~0_541, main_~k~0=v_main_~k~0_100} OutVars{main_~i~0=v_main_~i~0_541, main_~k~0=v_main_~k~0_100} AuxVars[] AssignedVars[] [2021-05-02 23:47:49,277 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:47:49,279 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:49,282 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:49,332 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:49,338 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:49,377 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:47:49,408 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_543 1) (* 2 v_main_~k~0_101)) (not (= (mod v_main_~i~0_543 2) 0))) InVars {main_~i~0=v_main_~i~0_543, main_~k~0=v_main_~k~0_101} OutVars{main_~i~0=v_main_~i~0_543, main_~k~0=v_main_~k~0_101} AuxVars[] AssignedVars[] [2021-05-02 23:47:49,411 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:47:49,443 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:49,447 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:49,466 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:47:49,471 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:47:49,476 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:47:49,503 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:49,507 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_545 2) 0)) (< v_main_~i~0_545 (* 2 v_main_~k~0_102))) InVars {main_~i~0=v_main_~i~0_545, main_~k~0=v_main_~k~0_102} OutVars{main_~i~0=v_main_~i~0_545, main_~k~0=v_main_~k~0_102} AuxVars[] AssignedVars[] [2021-05-02 23:47:49,509 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:47:49,535 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:49,538 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:49,560 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:49,565 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:49,570 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:47:49,593 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_547 (* 2 v_main_~k~0_103)) (= (mod v_main_~i~0_547 2) 0)) InVars {main_~i~0=v_main_~i~0_547, main_~k~0=v_main_~k~0_103} OutVars{main_~i~0=v_main_~i~0_547, main_~k~0=v_main_~k~0_103} AuxVars[] AssignedVars[] [2021-05-02 23:47:49,595 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:47:49,634 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:49,637 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:49,667 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:47:49,669 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:47:49,672 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:47:49,684 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:49,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:49,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:52,033 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:47:52,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523936667] [2021-05-02 23:47:52,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523936667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:47:52,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:47:52,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:47:52,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084745926] [2021-05-02 23:47:52,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:47:52,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:47:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:47:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2014, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:47:52,034 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:47:55,182 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2021-05-02 23:47:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:47:55,183 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 2 states have call successors, (3), 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 87 [2021-05-02 23:47:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:47:55,183 INFO L225 Difference]: With dead ends: 105 [2021-05-02 23:47:55,183 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 23:47:55,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 38 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 3863.2ms TimeCoverageRelationStatistics Valid=414, Invalid=7068, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:47:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 23:47:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2021-05-02 23:47:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-05-02 23:47:55,197 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2021-05-02 23:47:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:47:55,198 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-05-02 23:47:55,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 44 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:47:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-05-02 23:47:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:47:55,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:47:55,198 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:47:55,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-02 23:47:55,199 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:47:55,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:47:55,199 INFO L82 PathProgramCache]: Analyzing trace with hash -43375254, now seen corresponding path program 25 times [2021-05-02 23:47:55,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:47:55,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104305741] [2021-05-02 23:47:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:47:55,220 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= 0 (mod v_main_~i~0_576 2)) (< (+ v_main_~i~0_576 1) (* 2 v_main_~k~0_104))) InVars {main_~i~0=v_main_~i~0_576, main_~k~0=v_main_~k~0_104} OutVars{main_~i~0=v_main_~i~0_576, main_~k~0=v_main_~k~0_104} AuxVars[] AssignedVars[] [2021-05-02 23:47:55,225 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:47:55,226 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,229 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,267 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:55,272 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:55,303 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:47:55,331 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_578 1) (* 2 v_main_~k~0_105)) (not (= (mod v_main_~i~0_578 2) 0))) InVars {main_~i~0=v_main_~i~0_578, main_~k~0=v_main_~k~0_105} OutVars{main_~i~0=v_main_~i~0_578, main_~k~0=v_main_~k~0_105} AuxVars[] AssignedVars[] [2021-05-02 23:47:55,333 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:47:55,334 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,336 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,347 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:47:55,352 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:47:55,374 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:47:55,395 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:55,398 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_580 2) 0)) (< v_main_~i~0_580 (* 2 v_main_~k~0_106))) InVars {main_~i~0=v_main_~i~0_580, main_~k~0=v_main_~k~0_106} OutVars{main_~i~0=v_main_~i~0_580, main_~k~0=v_main_~k~0_106} AuxVars[] AssignedVars[] [2021-05-02 23:47:55,399 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:47:55,400 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,404 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,427 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:47:55,431 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:47:55,453 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:47:55,475 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_582 (* 2 v_main_~k~0_107)) (= (mod v_main_~i~0_582 2) 0)) InVars {main_~i~0=v_main_~i~0_582, main_~k~0=v_main_~k~0_107} OutVars{main_~i~0=v_main_~i~0_582, main_~k~0=v_main_~k~0_107} AuxVars[] AssignedVars[] [2021-05-02 23:47:55,477 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:47:55,513 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,515 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:47:55,562 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:47:55,566 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:47:55,570 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:47:55,595 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:47:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:55,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:47:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:47:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:47:55,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:47:55,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:03,532 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:03,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104305741] [2021-05-02 23:48:03,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104305741] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:03,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:03,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:48:03,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058383481] [2021-05-02 23:48:03,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:48:03,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:03,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:48:03,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=3521, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:48:03,534 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 60 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 58 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:11,701 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-05-02 23:48:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:48:11,702 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 58 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-02 23:48:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:11,702 INFO L225 Difference]: With dead ends: 103 [2021-05-02 23:48:11,702 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 23:48:11,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 5 SyntacticMatches, 28 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 12464.3ms TimeCoverageRelationStatistics Valid=381, Invalid=12501, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:48:11,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 23:48:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 23:48:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-05-02 23:48:11,716 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2021-05-02 23:48:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:11,717 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-05-02 23:48:11,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 58 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-05-02 23:48:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 23:48:11,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:11,717 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:11,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-02 23:48:11,717 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:11,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1225332151, now seen corresponding path program 26 times [2021-05-02 23:48:11,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:11,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337265243] [2021-05-02 23:48:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:11,726 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_612 2) 0) (< (+ v_main_~i~0_612 1) (* 2 v_main_~k~0_108))) InVars {main_~i~0=v_main_~i~0_612, main_~k~0=v_main_~k~0_108} OutVars{main_~i~0=v_main_~i~0_612, main_~k~0=v_main_~k~0_108} AuxVars[] AssignedVars[] [2021-05-02 23:48:11,728 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:48:11,728 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:11,730 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:11,753 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:48:11,756 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:48:11,776 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:48:11,792 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_614 1) (* 2 v_main_~k~0_109)) (not (= (mod v_main_~i~0_614 2) 0))) InVars {main_~i~0=v_main_~i~0_614, main_~k~0=v_main_~k~0_109} OutVars{main_~i~0=v_main_~i~0_614, main_~k~0=v_main_~k~0_109} AuxVars[] AssignedVars[] [2021-05-02 23:48:11,793 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:48:11,794 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:11,796 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:11,806 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:48:11,808 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:48:11,822 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:48:11,833 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:11,835 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_616 2) 0)) (< v_main_~i~0_616 (* 2 v_main_~k~0_110))) InVars {main_~i~0=v_main_~i~0_616, main_~k~0=v_main_~k~0_110} OutVars{main_~i~0=v_main_~i~0_616, main_~k~0=v_main_~k~0_110} AuxVars[] AssignedVars[] [2021-05-02 23:48:11,836 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:48:11,850 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:11,852 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:11,860 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:48:11,862 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:48:11,865 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:48:11,883 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_618 2) 0) (< v_main_~i~0_618 (* 2 v_main_~k~0_111))) InVars {main_~i~0=v_main_~i~0_618, main_~k~0=v_main_~k~0_111} OutVars{main_~i~0=v_main_~i~0_618, main_~k~0=v_main_~k~0_111} AuxVars[] AssignedVars[] [2021-05-02 23:48:11,885 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:48:11,910 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:11,911 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:11,936 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:48:11,939 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:48:11,941 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:48:11,958 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:12,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:12,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:18,569 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:18,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337265243] [2021-05-02 23:48:18,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1337265243] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:18,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:18,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:48:18,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109284799] [2021-05-02 23:48:18,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:48:18,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:48:18,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2200, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:48:18,571 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 49 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 47 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:27,715 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-05-02 23:48:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:48:27,719 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 47 states have internal predecessors, (89), 2 states have call successors, (3), 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 93 [2021-05-02 23:48:27,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:27,720 INFO L225 Difference]: With dead ends: 111 [2021-05-02 23:48:27,720 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 23:48:27,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 6 SyntacticMatches, 41 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 10663.3ms TimeCoverageRelationStatistics Valid=436, Invalid=7936, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:48:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 23:48:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2021-05-02 23:48:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-05-02 23:48:27,736 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2021-05-02 23:48:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:27,737 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-05-02 23:48:27,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 47 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-05-02 23:48:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 23:48:27,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:27,737 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:27,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-02 23:48:27,738 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:27,738 INFO L82 PathProgramCache]: Analyzing trace with hash -944530228, now seen corresponding path program 27 times [2021-05-02 23:48:27,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:27,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11544152] [2021-05-02 23:48:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:27,756 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_649 1) (* 2 v_main_~k~0_112)) (= (mod v_main_~i~0_649 2) 0)) InVars {main_~i~0=v_main_~i~0_649, main_~k~0=v_main_~k~0_112} OutVars{main_~i~0=v_main_~i~0_649, main_~k~0=v_main_~k~0_112} AuxVars[] AssignedVars[] [2021-05-02 23:48:27,759 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:48:27,821 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:27,825 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:27,893 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:48:27,903 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:48:27,911 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:48:27,970 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_651 2) 0)) (< (+ v_main_~i~0_651 1) (* 2 v_main_~k~0_113))) InVars {main_~i~0=v_main_~i~0_651, main_~k~0=v_main_~k~0_113} OutVars{main_~i~0=v_main_~i~0_651, main_~k~0=v_main_~k~0_113} AuxVars[] AssignedVars[] [2021-05-02 23:48:27,972 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:48:27,974 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:27,978 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:28,001 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:48:28,010 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:48:28,046 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:48:28,081 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:28,086 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_653 2) 0)) (< v_main_~i~0_653 (* 2 v_main_~k~0_114))) InVars {main_~i~0=v_main_~i~0_653, main_~k~0=v_main_~k~0_114} OutVars{main_~i~0=v_main_~i~0_653, main_~k~0=v_main_~k~0_114} AuxVars[] AssignedVars[] [2021-05-02 23:48:28,088 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:48:28,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:28,095 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:28,127 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:48:28,135 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:48:28,179 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:48:28,227 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_655 (* 2 v_main_~k~0_115)) (= 0 (mod v_main_~i~0_655 2))) InVars {main_~i~0=v_main_~i~0_655, main_~k~0=v_main_~k~0_115} OutVars{main_~i~0=v_main_~i~0_655, main_~k~0=v_main_~k~0_115} AuxVars[] AssignedVars[] [2021-05-02 23:48:28,230 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:48:28,293 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:28,297 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:28,358 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:48:28,367 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:48:28,374 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:48:28,425 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:28,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:28,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:35,243 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:35,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11544152] [2021-05-02 23:48:35,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [11544152] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:35,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:35,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:48:35,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652727360] [2021-05-02 23:48:35,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:48:35,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:35,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:48:35,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2362, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:48:35,244 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 50 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 48 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:48:41,995 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2021-05-02 23:48:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:48:41,998 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 48 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 23:48:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:48:41,999 INFO L225 Difference]: With dead ends: 114 [2021-05-02 23:48:41,999 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 23:48:42,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 4 SyntacticMatches, 45 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2593 ImplicationChecksByTransitivity, 9637.2ms TimeCoverageRelationStatistics Valid=507, Invalid=8423, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:48:42,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 23:48:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2021-05-02 23:48:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 23:48:42,016 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2021-05-02 23:48:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:48:42,016 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 23:48:42,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 48 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 23:48:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 23:48:42,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:48:42,017 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:48:42,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-02 23:48:42,017 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:48:42,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:48:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1536898283, now seen corresponding path program 28 times [2021-05-02 23:48:42,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:48:42,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750379700] [2021-05-02 23:48:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:48:42,033 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_687 1) (* 2 v_main_~k~0_116)) (= (mod v_main_~i~0_687 2) 0)) InVars {main_~i~0=v_main_~i~0_687, main_~k~0=v_main_~k~0_116} OutVars{main_~i~0=v_main_~i~0_687, main_~k~0=v_main_~k~0_116} AuxVars[] AssignedVars[] [2021-05-02 23:48:42,038 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:48:42,065 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:42,067 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:42,094 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:48:42,097 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:48:42,100 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:48:42,117 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_689 2) 0)) (< (+ v_main_~i~0_689 1) (* 2 v_main_~k~0_117))) InVars {main_~i~0=v_main_~i~0_689, main_~k~0=v_main_~k~0_117} OutVars{main_~i~0=v_main_~i~0_689, main_~k~0=v_main_~k~0_117} AuxVars[] AssignedVars[] [2021-05-02 23:48:42,119 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:48:42,120 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:42,122 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:42,133 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:48:42,137 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:48:42,151 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:48:42,163 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:42,165 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_691 2) 0)) (< v_main_~i~0_691 (* 2 v_main_~k~0_118))) InVars {main_~i~0=v_main_~i~0_691, main_~k~0=v_main_~k~0_118} OutVars{main_~i~0=v_main_~i~0_691, main_~k~0=v_main_~k~0_118} AuxVars[] AssignedVars[] [2021-05-02 23:48:42,166 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:48:42,167 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:42,176 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:42,186 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:48:42,189 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:48:42,202 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:48:42,217 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_693 2) 0) (< v_main_~i~0_693 (* 2 v_main_~k~0_119))) InVars {main_~i~0=v_main_~i~0_693, main_~k~0=v_main_~k~0_119} OutVars{main_~i~0=v_main_~i~0_693, main_~k~0=v_main_~k~0_119} AuxVars[] AssignedVars[] [2021-05-02 23:48:42,220 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:48:42,222 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:42,224 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:48:42,252 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:48:42,256 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:48:42,280 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:48:42,298 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:48:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:42,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:48:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:48:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:48:42,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:42,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:48:51,347 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:48:51,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750379700] [2021-05-02 23:48:51,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [750379700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:48:51,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:48:51,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:48:51,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936611311] [2021-05-02 23:48:51,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:48:51,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:48:51,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:48:51,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=4401, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:48:51,349 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 67 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 65 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:48:52,810 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:48:53,208 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:48:53,579 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:48:53,984 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:48:58,863 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:48:59,223 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:48:59,624 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:49:00,033 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:49:00,641 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:49:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:06,552 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2021-05-02 23:49:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:49:06,553 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 65 states have internal predecessors, (95), 2 states have call successors, (3), 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 99 [2021-05-02 23:49:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:06,560 INFO L225 Difference]: With dead ends: 113 [2021-05-02 23:49:06,561 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 23:49:06,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 5 SyntacticMatches, 29 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3819 ImplicationChecksByTransitivity, 17504.3ms TimeCoverageRelationStatistics Valid=429, Invalid=15827, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:49:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 23:49:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-05-02 23:49:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-05-02 23:49:06,587 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2021-05-02 23:49:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:06,588 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-05-02 23:49:06,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 65 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-05-02 23:49:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:49:06,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:06,588 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:06,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-05-02 23:49:06,589 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1022001838, now seen corresponding path program 29 times [2021-05-02 23:49:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:06,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595469891] [2021-05-02 23:49:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:06,602 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_726 2) 0) (< (+ v_main_~i~0_726 1) (* 2 v_main_~k~0_120))) InVars {main_~i~0=v_main_~i~0_726, main_~k~0=v_main_~k~0_120} OutVars{main_~i~0=v_main_~i~0_726, main_~k~0=v_main_~k~0_120} AuxVars[] AssignedVars[] [2021-05-02 23:49:06,605 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:49:06,649 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:06,652 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:06,687 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:49:06,691 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:49:06,696 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:49:06,738 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_728 2) 0)) (< (+ v_main_~i~0_728 1) (* 2 v_main_~k~0_121))) InVars {main_~i~0=v_main_~i~0_728, main_~k~0=v_main_~k~0_121} OutVars{main_~i~0=v_main_~i~0_728, main_~k~0=v_main_~k~0_121} AuxVars[] AssignedVars[] [2021-05-02 23:49:06,741 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:49:06,772 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:06,802 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:06,817 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:49:06,822 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:49:06,827 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:49:06,845 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:06,848 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_730 2) 0)) (< v_main_~i~0_730 (* 2 v_main_~k~0_122))) InVars {main_~i~0=v_main_~i~0_730, main_~k~0=v_main_~k~0_122} OutVars{main_~i~0=v_main_~i~0_730, main_~k~0=v_main_~k~0_122} AuxVars[] AssignedVars[] [2021-05-02 23:49:06,851 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:49:06,875 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:06,878 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:06,895 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:49:06,898 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:49:06,902 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:49:06,921 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_732 2) 0) (< v_main_~i~0_732 (* 2 v_main_~k~0_123))) InVars {main_~i~0=v_main_~i~0_732, main_~k~0=v_main_~k~0_123} OutVars{main_~i~0=v_main_~i~0_732, main_~k~0=v_main_~k~0_123} AuxVars[] AssignedVars[] [2021-05-02 23:49:06,924 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:49:06,925 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:06,927 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:06,960 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:49:06,964 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:49:06,996 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:49:07,022 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:07,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:49:07,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:11,403 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:11,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595469891] [2021-05-02 23:49:11,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1595469891] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:11,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:11,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:49:11,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141036913] [2021-05-02 23:49:11,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:49:11,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:11,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:49:11,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2662, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:49:11,405 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 53 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 51 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:49:23,359 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2021-05-02 23:49:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:49:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 51 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:49:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:49:23,365 INFO L225 Difference]: With dead ends: 120 [2021-05-02 23:49:23,365 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 23:49:23,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 4 SyntacticMatches, 48 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2957 ImplicationChecksByTransitivity, 9578.5ms TimeCoverageRelationStatistics Valid=541, Invalid=9559, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:49:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 23:49:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2021-05-02 23:49:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-05-02 23:49:23,412 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2021-05-02 23:49:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:49:23,413 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-05-02 23:49:23,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 51 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-05-02 23:49:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 23:49:23,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:49:23,413 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:49:23,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-05-02 23:49:23,414 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:49:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:49:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 65962483, now seen corresponding path program 30 times [2021-05-02 23:49:23,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:49:23,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394192967] [2021-05-02 23:49:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:49:23,430 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_766 1) (* 2 v_main_~k~0_124)) (= (mod v_main_~i~0_766 2) 0)) InVars {main_~i~0=v_main_~i~0_766, main_~k~0=v_main_~k~0_124} OutVars{main_~i~0=v_main_~i~0_766, main_~k~0=v_main_~k~0_124} AuxVars[] AssignedVars[] [2021-05-02 23:49:23,438 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:49:23,440 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:23,444 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:23,510 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:49:23,517 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:49:23,570 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:49:23,619 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_768 2) 0)) (< (+ v_main_~i~0_768 1) (* 2 v_main_~k~0_125))) InVars {main_~i~0=v_main_~i~0_768, main_~k~0=v_main_~k~0_125} OutVars{main_~i~0=v_main_~i~0_768, main_~k~0=v_main_~k~0_125} AuxVars[] AssignedVars[] [2021-05-02 23:49:23,622 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:49:23,624 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:23,629 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:23,647 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:49:23,658 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:49:23,703 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:49:23,743 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:23,768 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_770 (* 2 v_main_~k~0_126)) (not (= 0 (mod v_main_~i~0_770 2)))) InVars {main_~i~0=v_main_~i~0_770, main_~k~0=v_main_~k~0_126} OutVars{main_~i~0=v_main_~i~0_770, main_~k~0=v_main_~k~0_126} AuxVars[] AssignedVars[] [2021-05-02 23:49:23,771 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:49:23,807 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:23,811 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:23,848 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:49:23,855 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:49:23,870 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:49:23,909 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_772 (* 2 v_main_~k~0_127)) (= (mod v_main_~i~0_772 2) 0)) InVars {main_~i~0=v_main_~i~0_772, main_~k~0=v_main_~k~0_127} OutVars{main_~i~0=v_main_~i~0_772, main_~k~0=v_main_~k~0_127} AuxVars[] AssignedVars[] [2021-05-02 23:49:23,912 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:49:23,914 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:23,919 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:49:23,983 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:49:23,991 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:49:24,043 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:49:24,089 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:49:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:24,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:49:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:49:24,457 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 23:49:24,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:24,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:49:25,394 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-02 23:49:26,146 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:49:27,003 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:49:28,062 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:49:29,302 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:49:30,540 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:49:31,849 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:49:33,415 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:49:35,107 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:49:37,100 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:49:39,214 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:49:41,426 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:49:43,815 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:49:46,472 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:49:49,376 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:49:49,973 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:49:49,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394192967] [2021-05-02 23:49:49,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394192967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:49:49,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:49:49,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:49:49,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10383861] [2021-05-02 23:49:49,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:49:49,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:49:49,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:49:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=4948, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:49:49,975 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 71 states, 70 states have (on average 1.4428571428571428) internal successors, (101), 69 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:49:50,598 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 23:49:51,226 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:49:51,701 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:49:52,198 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:49:53,147 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:49:53,616 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:49:54,075 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:49:54,608 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:49:55,388 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:49:55,841 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:49:56,299 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:49:56,837 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:49:57,764 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:49:58,293 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:49:58,763 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:49:59,270 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:50:12,576 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:50:14,319 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:50:14,934 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:50:15,402 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:50:16,022 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:50:16,688 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:50:17,625 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:50:18,148 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:50:18,704 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:50:19,429 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:50:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:50:20,798 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2021-05-02 23:50:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:50:20,805 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.4428571428571428) internal successors, (101), 69 states have internal predecessors, (101), 2 states have call successors, (3), 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 105 [2021-05-02 23:50:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:50:20,806 INFO L225 Difference]: With dead ends: 119 [2021-05-02 23:50:20,806 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 23:50:20,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 31 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4314 ImplicationChecksByTransitivity, 42245.2ms TimeCoverageRelationStatistics Valid=456, Invalid=17904, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:50:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 23:50:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-05-02 23:50:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-05-02 23:50:20,845 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 105 [2021-05-02 23:50:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:50:20,845 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-05-02 23:50:20,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 70 states have (on average 1.4428571428571428) internal successors, (101), 69 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call 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 L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-05-02 23:50:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 23:50:20,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:50:20,846 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:50:20,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-05-02 23:50:20,846 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:50:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:50:20,847 INFO L82 PathProgramCache]: Analyzing trace with hash 400684816, now seen corresponding path program 31 times [2021-05-02 23:50:20,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:50:20,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199334796] [2021-05-02 23:50:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:50:20,870 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_807 2) 0) (< (+ v_main_~i~0_807 1) (* 2 v_main_~k~0_128))) InVars {main_~i~0=v_main_~i~0_807, main_~k~0=v_main_~k~0_128} OutVars{main_~i~0=v_main_~i~0_807, main_~k~0=v_main_~k~0_128} AuxVars[] AssignedVars[] [2021-05-02 23:50:20,883 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 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 23:50:20,967 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,054 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:50:21,079 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:50:21,101 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:50:21,179 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_809 1) (* 2 v_main_~k~0_129)) (not (= (mod v_main_~i~0_809 2) 0))) InVars {main_~i~0=v_main_~i~0_809, main_~k~0=v_main_~k~0_129} OutVars{main_~i~0=v_main_~i~0_809, main_~k~0=v_main_~k~0_129} AuxVars[] AssignedVars[] [2021-05-02 23:50:21,183 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:50:21,185 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,191 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,214 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:50:21,225 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:50:21,283 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:50:21,336 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:21,341 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_811 (* 2 v_main_~k~0_130)) (not (= (mod v_main_~i~0_811 2) 0))) InVars {main_~i~0=v_main_~i~0_811, main_~k~0=v_main_~k~0_130} OutVars{main_~i~0=v_main_~i~0_811, main_~k~0=v_main_~k~0_130} AuxVars[] AssignedVars[] [2021-05-02 23:50:21,344 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:50:21,346 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,351 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,388 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:50:21,397 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:50:21,444 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:50:21,501 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_813 2) 0) (< v_main_~i~0_813 (* 2 v_main_~k~0_131))) InVars {main_~i~0=v_main_~i~0_813, main_~k~0=v_main_~k~0_131} OutVars{main_~i~0=v_main_~i~0_813, main_~k~0=v_main_~k~0_131} AuxVars[] AssignedVars[] [2021-05-02 23:50:21,506 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:50:21,509 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,514 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:50:21,563 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:50:21,569 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:50:21,603 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:50:21,637 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:50:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:21,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:50:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:50:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:50:21,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:21,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:50:23,127 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-02 23:50:23,345 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:50:33,713 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:50:34,264 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:50:36,915 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:50:37,572 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:50:40,316 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:50:40,987 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:50:43,880 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:50:44,499 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:50:47,487 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:50:50,121 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:50:50,129 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:50:50,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199334796] [2021-05-02 23:50:50,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199334796] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:50:50,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:50:50,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:50:50,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588804296] [2021-05-02 23:50:50,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:50:50,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:50:50,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:50:50,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=5090, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:50:50,131 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 72 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 70 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:50:51,032 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 23:50:51,948 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:50:52,687 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:50:53,458 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:50:54,579 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:50:55,042 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:50:55,550 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:50:56,336 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:50:57,557 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:50:59,079 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:51:00,314 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:51:01,005 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:01,653 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:02,331 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:51:03,457 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:51:04,139 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:04,810 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:05,717 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:51:06,934 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:51:07,648 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:08,301 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:12,670 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:51:13,329 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:51:14,006 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:14,793 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:51:16,007 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:51:16,684 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:17,379 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:18,121 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:51:19,581 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:51:20,515 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:23,696 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:24,749 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:51:25,837 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:51:26,835 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:51:27,226 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:27,677 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:51:28,776 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:51:29,590 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:51:30,193 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:51:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:51:31,028 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2021-05-02 23:51:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:51:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 70 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-02 23:51:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:51:31,035 INFO L225 Difference]: With dead ends: 121 [2021-05-02 23:51:31,035 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 23:51:31,036 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 5 SyntacticMatches, 34 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 50254.0ms TimeCoverageRelationStatistics Valid=462, Invalid=18444, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:51:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 23:51:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 23:51:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-05-02 23:51:31,055 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2021-05-02 23:51:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:51:31,060 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-05-02 23:51:31,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 70 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:51:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-05-02 23:51:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 23:51:31,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:51:31,065 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:51:31,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-05-02 23:51:31,065 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:51:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:51:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1719605841, now seen corresponding path program 32 times [2021-05-02 23:51:31,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:51:31,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005831587] [2021-05-02 23:51:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:51:31,091 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_849 2) 0) (< (+ v_main_~i~0_849 1) (* 2 v_main_~k~0_132))) InVars {main_~i~0=v_main_~i~0_849, main_~k~0=v_main_~k~0_132} OutVars{main_~i~0=v_main_~i~0_849, main_~k~0=v_main_~k~0_132} AuxVars[] AssignedVars[] [2021-05-02 23:51:31,096 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:51:31,098 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:31,103 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:31,198 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:51:31,210 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:51:31,301 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:51:31,392 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_851 1) (* 2 v_main_~k~0_133)) (not (= (mod v_main_~i~0_851 2) 0))) InVars {main_~i~0=v_main_~i~0_851, main_~k~0=v_main_~k~0_133} OutVars{main_~i~0=v_main_~i~0_851, main_~k~0=v_main_~k~0_133} AuxVars[] AssignedVars[] [2021-05-02 23:51:31,396 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:51:31,468 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:31,481 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:31,531 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:51:31,546 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:51:31,562 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:51:31,638 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:31,644 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_853 (* 2 v_main_~k~0_134)) (not (= 0 (mod v_main_~i~0_853 2)))) InVars {main_~i~0=v_main_~i~0_853, main_~k~0=v_main_~k~0_134} OutVars{main_~i~0=v_main_~i~0_853, main_~k~0=v_main_~k~0_134} AuxVars[] AssignedVars[] [2021-05-02 23:51:31,648 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:51:31,650 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:31,655 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:31,715 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:51:31,731 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:51:31,794 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:51:31,867 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_855 (* 2 v_main_~k~0_135)) (= (mod v_main_~i~0_855 2) 0)) InVars {main_~i~0=v_main_~i~0_855, main_~k~0=v_main_~k~0_135} OutVars{main_~i~0=v_main_~i~0_855, main_~k~0=v_main_~k~0_135} AuxVars[] AssignedVars[] [2021-05-02 23:51:31,871 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:51:31,961 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:31,967 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:51:32,070 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:51:32,085 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:51:32,099 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:51:32,189 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:51:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:32,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:51:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:51:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:51:32,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:32,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:51:32,912 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-05-02 23:51:34,341 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-02 23:51:34,618 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:51:35,350 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:51:35,761 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:51:36,098 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:51:36,736 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:51:37,037 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:51:37,470 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:51:37,804 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:51:38,571 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:51:38,939 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:51:39,349 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:51:39,741 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:51:40,713 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:51:41,139 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:51:41,699 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:51:42,141 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:51:43,247 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:51:43,674 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:51:44,171 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:51:44,602 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:51:55,177 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:51:57,338 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:51:59,814 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:52:02,397 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:52:03,018 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:52:03,027 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:52:03,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005831587] [2021-05-02 23:52:03,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1005831587] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:52:03,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:52:03,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:52:03,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649980952] [2021-05-02 23:52:03,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:52:03,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:52:03,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:52:03,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=5527, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:52:03,029 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 75 states, 74 states have (on average 1.445945945945946) internal successors, (107), 73 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:04,018 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 23:52:05,070 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:52:05,820 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:52:06,636 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:08,055 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:08,825 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:52:09,658 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:52:10,552 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:52:11,440 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:12,210 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:12,738 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:52:13,429 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:13,854 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:14,722 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:52:15,788 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:16,637 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:52:17,610 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:18,403 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:19,214 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:20,174 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:52:21,595 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:52:22,385 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:23,173 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:24,113 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:52:25,705 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:26,555 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:27,409 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:28,257 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:52:29,688 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:52:30,465 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:31,252 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:32,109 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:52:33,550 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:34,318 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:35,128 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:36,130 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:52:37,530 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:52:38,029 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:38,668 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:39,314 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:52:40,158 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:42,002 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:52:42,496 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:42,890 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:43,368 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:52:44,241 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:44,738 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:45,215 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:45,773 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:52:46,637 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:52:47,109 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:47,563 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:48,086 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:52:49,038 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:49,571 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:50,278 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:51,227 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:52:52,695 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:52:53,513 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:52:54,369 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:52:55,401 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:52:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:52:57,526 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2021-05-02 23:52:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:52:57,536 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.445945945945946) internal successors, (107), 73 states have internal predecessors, (107), 2 states have call successors, (3), 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 111 [2021-05-02 23:52:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:52:57,537 INFO L225 Difference]: With dead ends: 125 [2021-05-02 23:52:57,537 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 23:52:57,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 5 SyntacticMatches, 33 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4839 ImplicationChecksByTransitivity, 59681.2ms TimeCoverageRelationStatistics Valid=483, Invalid=20109, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:52:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 23:52:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-05-02 23:52:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-05-02 23:52:57,563 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 111 [2021-05-02 23:52:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:52:57,563 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-05-02 23:52:57,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 74 states have (on average 1.445945945945946) internal successors, (107), 73 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:52:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-05-02 23:52:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:52:57,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:52:57,564 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:52:57,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2021-05-02 23:52:57,565 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:52:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:52:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash 815077874, now seen corresponding path program 33 times [2021-05-02 23:52:57,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:52:57,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559604433] [2021-05-02 23:52:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:52:57,602 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_892 2) 0) (< (+ v_main_~i~0_892 1) (* 2 v_main_~k~0_136))) InVars {main_~i~0=v_main_~i~0_892, main_~k~0=v_main_~k~0_136} OutVars{main_~i~0=v_main_~i~0_892, main_~k~0=v_main_~k~0_136} AuxVars[] AssignedVars[] [2021-05-02 23:52:57,606 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:52:57,610 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:57,617 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:57,751 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:52:57,767 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:52:57,895 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:52:58,009 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_894 1) (* 2 v_main_~k~0_137)) (not (= (mod v_main_~i~0_894 2) 0))) InVars {main_~i~0=v_main_~i~0_894, main_~k~0=v_main_~k~0_137} OutVars{main_~i~0=v_main_~i~0_894, main_~k~0=v_main_~k~0_137} AuxVars[] AssignedVars[] [2021-05-02 23:52:58,012 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:52:58,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:58,097 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:58,141 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:52:58,158 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:52:58,172 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:52:58,260 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:58,268 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_896 2) 0)) (< v_main_~i~0_896 (* 2 v_main_~k~0_138))) InVars {main_~i~0=v_main_~i~0_896, main_~k~0=v_main_~k~0_138} OutVars{main_~i~0=v_main_~i~0_896, main_~k~0=v_main_~k~0_138} AuxVars[] AssignedVars[] [2021-05-02 23:52:58,273 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:52:58,275 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:58,282 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:58,323 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:52:58,339 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:52:58,425 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:52:58,517 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_898 (* 2 v_main_~k~0_139)) (= (mod v_main_~i~0_898 2) 0)) InVars {main_~i~0=v_main_~i~0_898, main_~k~0=v_main_~k~0_139} OutVars{main_~i~0=v_main_~i~0_898, main_~k~0=v_main_~k~0_139} AuxVars[] AssignedVars[] [2021-05-02 23:52:58,521 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:52:58,631 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:58,638 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:52:58,757 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:52:58,779 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:52:58,797 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:52:58,907 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 23:52:58,915 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:52:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:59,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:52:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:52:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:52:59,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:59,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:52:59,701 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-05-02 23:52:59,916 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-02 23:53:00,111 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:53:00,346 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:00,818 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:01,048 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:53:01,410 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-02 23:53:01,683 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:53:02,275 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:02,539 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:53:02,951 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:53:03,310 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:53:04,021 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:04,339 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:04,813 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:53:05,195 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:53:06,069 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:06,469 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:07,001 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:53:07,492 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:53:08,544 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:08,983 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:09,582 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:53:10,116 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:53:11,271 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:53:11,783 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:12,376 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:53:12,906 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:53:14,230 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:14,785 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:15,474 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:53:16,046 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:53:17,534 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:53:18,099 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:18,796 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:53:19,425 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:53:20,993 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:21,575 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:22,405 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:53:23,139 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:53:24,830 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:53:25,519 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:26,364 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:53:27,074 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:53:28,964 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:29,682 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:30,616 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:53:31,513 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:53:33,523 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:53:34,266 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:35,133 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:53:35,968 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:53:38,352 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:39,205 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:40,168 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:53:41,036 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:53:43,487 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:53:44,306 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:45,294 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:53:46,200 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:53:48,739 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:49,618 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:53:50,671 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:53:51,680 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:53:54,396 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:53:55,398 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:56,416 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:53:59,228 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:53:59,235 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:53:59,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559604433] [2021-05-02 23:53:59,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [559604433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:53:59,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:53:59,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:53:59,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632281130] [2021-05-02 23:53:59,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:53:59,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:53:59,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:53:59,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=5677, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:53:59,237 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 76 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 74 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:54:00,211 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 23:54:01,243 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:54:01,989 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:54:02,791 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:04,129 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:04,869 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:54:05,654 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:54:06,530 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:54:07,896 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:08,701 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:54:09,542 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:10,449 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:54:11,706 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:12,478 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:13,238 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:14,050 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:54:15,395 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:16,100 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:16,887 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:17,789 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:54:19,127 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:19,965 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:20,806 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:21,628 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:54:23,050 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:54:23,788 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:24,603 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:25,592 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:54:27,071 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:27,825 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:28,602 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:29,551 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:54:30,703 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:54:31,138 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:31,560 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:32,075 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:54:33,032 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:33,664 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:34,449 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:35,250 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:54:36,599 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:54:37,293 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:38,016 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:38,903 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:54:40,365 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:41,149 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:41,928 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:42,971 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:54:44,401 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:54:45,171 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:45,941 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:46,793 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:54:48,188 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:49,084 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:49,960 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:50,927 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:54:52,475 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:54:53,327 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:54,115 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:55,020 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:54:56,407 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:54:57,307 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:58,170 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:54:59,256 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:55:00,838 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:55:01,750 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:55:02,684 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:55:03,743 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:55:05,492 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:55:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:55:07,685 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2021-05-02 23:55:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:55:07,697 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 74 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 23:55:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:55:07,698 INFO L225 Difference]: With dead ends: 127 [2021-05-02 23:55:07,698 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 23:55:07,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 5 SyntacticMatches, 36 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4990 ImplicationChecksByTransitivity, 96009.8ms TimeCoverageRelationStatistics Valid=489, Invalid=20681, Unknown=0, NotChecked=0, Total=21170 [2021-05-02 23:55:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 23:55:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 23:55:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-05-02 23:55:07,728 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2021-05-02 23:55:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:55:07,729 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-05-02 23:55:07,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 74 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:55:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-05-02 23:55:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 23:55:07,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:55:07,730 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:55:07,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-05-02 23:55:07,730 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:55:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:55:07,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1127779281, now seen corresponding path program 34 times [2021-05-02 23:55:07,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:55:07,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204604855] [2021-05-02 23:55:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:55:07,773 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_936 2) 0) (< (+ v_main_~i~0_936 1) (* 2 v_main_~k~0_140))) InVars {main_~i~0=v_main_~i~0_936, main_~k~0=v_main_~k~0_140} OutVars{main_~i~0=v_main_~i~0_936, main_~k~0=v_main_~k~0_140} AuxVars[] AssignedVars[] [2021-05-02 23:55:07,779 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:55:07,784 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:07,791 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:07,969 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:55:07,989 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:55:08,144 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:55:08,271 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 23:55:08,290 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_938 1) (* 2 v_main_~k~0_141)) (not (= (mod v_main_~i~0_938 2) 0))) InVars {main_~i~0=v_main_~i~0_938, main_~k~0=v_main_~k~0_141} OutVars{main_~i~0=v_main_~i~0_938, main_~k~0=v_main_~k~0_141} AuxVars[] AssignedVars[] [2021-05-02 23:55:08,295 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:55:08,390 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:08,398 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:08,444 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:55:08,462 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:55:08,478 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:55:08,566 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:55:08,575 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_940 (* 2 v_main_~k~0_142)) (not (= (mod v_main_~i~0_940 2) 0))) InVars {main_~i~0=v_main_~i~0_940, main_~k~0=v_main_~k~0_142} OutVars{main_~i~0=v_main_~i~0_940, main_~k~0=v_main_~k~0_142} AuxVars[] AssignedVars[] [2021-05-02 23:55:08,580 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:55:08,584 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:08,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:08,636 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:55:08,654 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:55:08,739 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:55:08,830 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_942 2) 0) (< v_main_~i~0_942 (* 2 v_main_~k~0_143))) InVars {main_~i~0=v_main_~i~0_942, main_~k~0=v_main_~k~0_143} OutVars{main_~i~0=v_main_~i~0_942, main_~k~0=v_main_~k~0_143} AuxVars[] AssignedVars[] [2021-05-02 23:55:08,834 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:55:08,957 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:08,964 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:55:09,093 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:55:09,112 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:55:09,129 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:55:09,234 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 23:55:09,242 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:55:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:09,455 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-05-02 23:55:09,609 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-02 23:55:09,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:55:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:55:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:55:09,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:10,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:55:10,187 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-05-02 23:55:10,402 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-02 23:55:10,624 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:55:10,892 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:11,440 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:55:11,708 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:55:12,133 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-02 23:55:12,482 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:55:13,097 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:55:13,382 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 23:55:13,739 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:55:14,107 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:55:14,900 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:15,271 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:55:15,797 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:55:16,249 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:55:17,277 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:17,650 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:55:18,144 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:55:18,589 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:55:19,746 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:20,141 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:55:20,728 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:55:21,262 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:55:22,468 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:55:22,966 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:23,558 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:55:24,139 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:55:25,463 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:25,963 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:55:26,616 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:55:27,175 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:55:28,583 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:55:29,121 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:29,789 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:55:30,483 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:55:32,011 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:32,680 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:55:33,422 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:55:34,109 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:55:36,018 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:55:36,680 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:37,588 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:55:38,422 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:55:40,615 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:41,319 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:55:42,184 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:55:43,065 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:55:45,212 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:55:45,986 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:46,886 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:55:47,792 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:55:50,166 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:51,833 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:55:52,836 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:55:55,337 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:55:56,253 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:55:57,417 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:55:58,487 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:56:01,972 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:56:03,086 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:56:04,220 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:56:07,171 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:56:08,293 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:56:09,557 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:56:10,459 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:56:12,475 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:56:13,995 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:56:14,919 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:56:14,926 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:56:14,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204604855] [2021-05-02 23:56:14,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [204604855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:56:14,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:56:14,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:56:14,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519839434] [2021-05-02 23:56:14,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:56:14,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:56:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:56:14,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=6138, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:56:14,928 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 79 states, 78 states have (on average 1.4487179487179487) internal successors, (113), 77 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:56:15,888 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 23:56:16,881 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:56:17,613 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:56:18,453 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:19,797 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:20,620 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:56:21,311 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:56:22,018 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:56:23,486 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:24,150 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:56:24,889 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:25,675 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:56:26,955 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:27,678 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:28,435 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:29,202 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:56:30,678 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:31,382 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:31,974 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:32,860 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:56:34,406 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:35,270 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:36,106 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:37,032 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:56:38,491 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:56:39,330 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:40,148 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:41,356 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:56:43,097 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:44,066 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:44,883 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:45,879 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:56:47,392 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:56:48,204 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:48,837 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:49,602 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:56:51,050 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:51,865 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:52,747 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:53,556 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:56:54,946 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:56:55,686 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:56,441 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:57,099 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:56:58,191 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:56:58,831 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:56:59,406 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:00,175 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:57:01,274 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:57:01,886 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:57:02,661 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:03,472 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:57:04,770 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:57:05,659 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:06,480 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:07,376 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:57:08,797 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:57:09,566 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:57:10,413 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:11,175 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:57:12,639 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:57:13,558 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:14,704 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:16,150 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:57:18,336 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:57:19,390 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:57:20,273 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:21,287 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:57:22,699 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:57:23,473 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:24,302 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:57:25,335 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:57:27,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:57:27,465 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2021-05-02 23:57:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:57:27,475 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.4487179487179487) internal successors, (113), 77 states have internal predecessors, (113), 2 states have call successors, (3), 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 117 [2021-05-02 23:57:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:57:27,475 INFO L225 Difference]: With dead ends: 131 [2021-05-02 23:57:27,475 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 23:57:27,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 35 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5394 ImplicationChecksByTransitivity, 103727.3ms TimeCoverageRelationStatistics Valid=510, Invalid=22442, Unknown=0, NotChecked=0, Total=22952 [2021-05-02 23:57:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 23:57:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-05-02 23:57:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2021-05-02 23:57:27,523 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 117 [2021-05-02 23:57:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:57:27,523 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2021-05-02 23:57:27,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 78 states have (on average 1.4487179487179487) internal successors, (113), 77 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:27,523 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2021-05-02 23:57:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 23:57:27,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:57:27,524 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:57:27,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-05-02 23:57:27,524 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:57:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:57:27,525 INFO L82 PathProgramCache]: Analyzing trace with hash -30995628, now seen corresponding path program 35 times [2021-05-02 23:57:27,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:57:27,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421403466] [2021-05-02 23:57:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:57:27,555 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_981 1) (* 2 v_main_~k~0_144)) (= 0 (mod v_main_~i~0_981 2))) InVars {main_~i~0=v_main_~i~0_981, main_~k~0=v_main_~k~0_144} OutVars{main_~i~0=v_main_~i~0_981, main_~k~0=v_main_~k~0_144} AuxVars[] AssignedVars[] [2021-05-02 23:57:27,560 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:57:27,661 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:27,666 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:27,770 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:57:27,784 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:57:27,797 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:57:27,879 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_983 1) (* 2 v_main_~k~0_145)) (not (= (mod v_main_~i~0_983 2) 0))) InVars {main_~i~0=v_main_~i~0_983, main_~k~0=v_main_~k~0_145} OutVars{main_~i~0=v_main_~i~0_983, main_~k~0=v_main_~k~0_145} AuxVars[] AssignedVars[] [2021-05-02 23:57:27,883 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:57:27,886 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:27,892 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:27,939 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:57:27,952 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:57:28,018 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:57:28,078 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:28,085 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_985 (* 2 v_main_~k~0_146)) (not (= 0 (mod v_main_~i~0_985 2)))) InVars {main_~i~0=v_main_~i~0_985, main_~k~0=v_main_~k~0_146} OutVars{main_~i~0=v_main_~i~0_985, main_~k~0=v_main_~k~0_146} AuxVars[] AssignedVars[] [2021-05-02 23:57:28,088 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:57:28,142 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,148 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,227 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:57:28,243 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:57:28,257 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:57:28,336 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_987 2) 0) (< v_main_~i~0_987 (* 2 v_main_~k~0_147))) InVars {main_~i~0=v_main_~i~0_987, main_~k~0=v_main_~k~0_147} OutVars{main_~i~0=v_main_~i~0_987, main_~k~0=v_main_~k~0_147} AuxVars[] AssignedVars[] [2021-05-02 23:57:28,340 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:57:28,449 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,456 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:57:28,621 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:57:28,634 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:57:28,648 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:57:28,743 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:57:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:29,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:57:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:57:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:57:29,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:57:46,584 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:57:46,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421403466] [2021-05-02 23:57:46,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [421403466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:57:46,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:57:46,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:57:46,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087608768] [2021-05-02 23:57:46,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:57:46,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:57:46,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:57:46,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3705, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:57:46,586 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 62 states, 61 states have (on average 1.901639344262295) internal successors, (116), 60 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:57:47,093 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 23:58:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:58:04,774 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2021-05-02 23:58:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:58:04,779 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.901639344262295) internal successors, (116), 60 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-02 23:58:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:58:04,780 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:58:04,780 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 23:58:04,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 56 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3786 ImplicationChecksByTransitivity, 25227.4ms TimeCoverageRelationStatistics Valid=573, Invalid=13469, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:58:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 23:58:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-05-02 23:58:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:58:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-02 23:58:04,801 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 120 [2021-05-02 23:58:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:58:04,801 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-02 23:58:04,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.901639344262295) internal successors, (116), 60 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:58:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-02 23:58:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 23:58:04,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:58:04,802 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:58:04,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-05-02 23:58:04,802 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:58:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:58:04,802 INFO L82 PathProgramCache]: Analyzing trace with hash 659582861, now seen corresponding path program 36 times [2021-05-02 23:58:04,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:58:04,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086049737] [2021-05-02 23:58:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:58:04,820 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_1027 1) (* 2 v_main_~k~0_148)) (= (mod v_main_~i~0_1027 2) 0)) InVars {main_~i~0=v_main_~i~0_1027, main_~k~0=v_main_~k~0_148} OutVars{main_~i~0=v_main_~i~0_1027, main_~k~0=v_main_~k~0_148} AuxVars[] AssignedVars[] [2021-05-02 23:58:04,834 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:58:04,905 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:04,910 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:04,977 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:58:04,987 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:58:04,995 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:58:05,053 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_1029 2) 0)) (< (+ v_main_~i~0_1029 1) (* 2 v_main_~k~0_149))) InVars {main_~i~0=v_main_~i~0_1029, main_~k~0=v_main_~k~0_149} OutVars{main_~i~0=v_main_~i~0_1029, main_~k~0=v_main_~k~0_149} AuxVars[] AssignedVars[] [2021-05-02 23:58:05,056 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:58:05,098 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:05,105 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:05,127 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:58:05,136 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:58:05,144 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:58:05,186 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:05,191 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (not (= (mod v_main_~i~0_1031 2) 0)) (< v_main_~i~0_1031 (* 2 v_main_~k~0_150))) InVars {main_~i~0=v_main_~i~0_1031, main_~k~0=v_main_~k~0_150} OutVars{main_~i~0=v_main_~i~0_1031, main_~k~0=v_main_~k~0_150} AuxVars[] AssignedVars[] [2021-05-02 23:58:05,194 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:58:05,195 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:05,204 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:05,225 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:58:05,234 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:58:05,278 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:58:05,330 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_1033 (* 2 v_main_~k~0_151)) (= (mod v_main_~i~0_1033 2) 0)) InVars {main_~i~0=v_main_~i~0_1033, main_~k~0=v_main_~k~0_151} OutVars{main_~i~0=v_main_~i~0_1033, main_~k~0=v_main_~k~0_151} AuxVars[] AssignedVars[] [2021-05-02 23:58:05,334 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:58:05,336 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:05,340 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:58:05,413 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:58:05,426 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:58:05,505 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:58:05,565 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:58:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:05,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:58:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:58:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:58:05,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:58:05,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:58:07,012 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-02 23:58:07,908 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:58:08,900 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:58:09,976 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:58:11,050 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:58:12,349 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:58:13,863 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:58:15,533 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:58:17,444 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:58:19,486 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:58:21,498 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:58:23,949 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:58:26,546 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:58:29,352 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:58:31,956 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:58:32,661 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:58:36,164 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:58:36,982 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:58:39,118 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:58:39,873 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:58:40,722 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:58:41,535 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:58:44,605 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:58:45,475 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:58:46,325 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:58:46,332 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:58:46,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086049737] [2021-05-02 23:58:46,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086049737] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:58:46,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:58:46,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:58:46,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686188257] [2021-05-02 23:58:46,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:58:46,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:58:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:58:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=6781, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:58:46,334 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 83 states, 82 states have (on average 1.451219512195122) internal successors, (119), 81 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:58:47,341 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 23:58:48,391 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 23:58:49,157 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:58:49,946 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:58:51,116 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:58:51,884 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:58:52,736 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-02 23:58:53,678 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:58:55,093 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:58:55,872 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-02 23:58:56,649 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:58:57,480 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:58:58,758 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:58:59,460 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:00,187 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:00,979 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:59:02,207 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:02,903 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:03,630 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:04,477 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:59:05,782 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:06,513 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:07,291 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:08,236 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:59:09,592 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:59:10,340 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:11,053 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:11,736 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:59:13,062 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:13,833 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:14,566 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:15,409 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:59:16,408 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:59:16,956 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:17,515 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:18,172 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:59:19,211 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:19,819 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:20,400 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:20,994 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:59:21,941 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:59:22,563 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:23,127 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:23,728 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:59:24,711 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:25,273 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:25,828 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:26,488 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:59:27,438 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:59:28,020 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:28,603 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:29,220 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:59:30,148 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:30,664 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:31,159 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:31,727 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:59:32,659 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:59:33,183 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:33,759 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:34,411 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:59:35,436 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:36,051 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:36,687 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:37,447 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:59:38,510 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:59:39,111 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:39,639 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:40,304 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:59:41,251 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:41,799 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:42,354 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:42,972 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-02 23:59:44,141 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-02 23:59:44,879 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 23:59:45,638 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-02 23:59:46,449 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-02 23:59:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:59:48,405 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2021-05-02 23:59:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:59:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.451219512195122) internal successors, (119), 81 states have internal predecessors, (119), 2 states have call successors, (3), 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 123 [2021-05-02 23:59:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:59:48,415 INFO L225 Difference]: With dead ends: 137 [2021-05-02 23:59:48,415 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 23:59:48,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 5 SyntacticMatches, 37 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5979 ImplicationChecksByTransitivity, 73681.3ms TimeCoverageRelationStatistics Valid=537, Invalid=24903, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 23:59:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 23:59:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-05-02 23:59:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:59:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2021-05-02 23:59:48,445 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 123 [2021-05-02 23:59:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:59:48,445 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2021-05-02 23:59:48,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 82 states have (on average 1.451219512195122) internal successors, (119), 81 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:59:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2021-05-02 23:59:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 23:59:48,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:59:48,446 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:59:48,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-05-02 23:59:48,446 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:59:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:59:48,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1729959114, now seen corresponding path program 37 times [2021-05-02 23:59:48,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:59:48,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000473928] [2021-05-02 23:59:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:59:48,480 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_1074 1) (* 2 v_main_~k~0_152)) (= (mod v_main_~i~0_1074 2) 0)) InVars {main_~i~0=v_main_~i~0_1074, main_~k~0=v_main_~k~0_152} OutVars{main_~i~0=v_main_~i~0_1074, main_~k~0=v_main_~k~0_152} AuxVars[] AssignedVars[] [2021-05-02 23:59:48,484 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size [2021-05-02 23:59:48,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:48,597 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:48,730 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:59:48,744 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:48,759 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.5 percent of original size 101 [2021-05-02 23:59:48,856 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< (+ v_main_~i~0_1076 1) (* 2 v_main_~k~0_153)) (not (= (mod v_main_~i~0_1076 2) 0))) InVars {main_~i~0=v_main_~i~0_1076, main_~k~0=v_main_~k~0_153} OutVars{main_~i~0=v_main_~i~0_1076, main_~k~0=v_main_~k~0_153} AuxVars[] AssignedVars[] [2021-05-02 23:59:48,860 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size [2021-05-02 23:59:48,931 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:48,937 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:48,998 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-02 23:59:49,013 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-02 23:59:49,028 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.8 percent of original size 90 [2021-05-02 23:59:49,107 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:59:49,120 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_1078 (* 2 v_main_~k~0_154)) (not (= (mod v_main_~i~0_1078 2) 0))) InVars {main_~i~0=v_main_~i~0_1078, main_~k~0=v_main_~k~0_154} OutVars{main_~i~0=v_main_~i~0_1078, main_~k~0=v_main_~k~0_154} AuxVars[] AssignedVars[] [2021-05-02 23:59:49,124 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size [2021-05-02 23:59:49,127 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:49,133 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:49,183 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-02 23:59:49,198 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-02 23:59:49,267 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.3 percent of original size 84 [2021-05-02 23:59:49,347 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= (mod v_main_~i~0_1080 2) 0) (< v_main_~i~0_1080 (* 2 v_main_~k~0_155))) InVars {main_~i~0=v_main_~i~0_1080, main_~k~0=v_main_~k~0_155} OutVars{main_~i~0=v_main_~i~0_1080, main_~k~0=v_main_~k~0_155} AuxVars[] AssignedVars[] [2021-05-02 23:59:49,351 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size [2021-05-02 23:59:49,354 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:49,360 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 23:59:49,483 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-05-02 23:59:49,498 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-02 23:59:49,605 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 93.1 percent of original size 95 [2021-05-02 23:59:49,698 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-02 23:59:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:59:50,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:59:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:59:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:59:50,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:50,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 23:59:51,185 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-02 23:59:52,141 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:59:53,263 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:59:53,546 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:59:54,305 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:59:54,610 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:59:55,015 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 23:59:55,364 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 23:59:56,170 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:59:56,505 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 23:59:56,951 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 23:59:57,345 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 23:59:58,277 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 23:59:58,674 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 23:59:59,188 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 00:00:01,007 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 00:00:01,429 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 00:00:02,580 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 00:00:03,018 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 00:00:03,588 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 00:00:04,083 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 00:00:05,266 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 00:00:06,279 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 00:00:09,249 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 00:00:09,781 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 00:00:12,373 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 00:00:13,101 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 00:00:15,933 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 00:00:18,395 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 00:00:19,095 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 00:00:19,863 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 00:00:20,459 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 00:00:22,711 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 00:00:23,578 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 00:00:26,149 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 00:00:26,952 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 00:00:27,902 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 00:00:28,809 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 00:00:31,154 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28