/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-zilu/benchmark23_conjunctive.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:33:53,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:33:53,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:33:53,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:33:53,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:33:53,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:33:53,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:33:53,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:33:53,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:33:53,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:33:53,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:33:53,673 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:33:53,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:33:53,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:33:53,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:33:53,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:33:53,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:33:53,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:33:53,675 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:33:53,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:33:53,675 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:33:53,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:33:53,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:33:53,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:33:53,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:33:53,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:33:53,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:33:53,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:33:53,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:33:53,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:33:53,677 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:33:53,677 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:33:54,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:33:54,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:33:54,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:33:54,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:33:54,145 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:33:54,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.i [2021-05-03 00:33:54,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ef06139c/f2f9d280a2fe4fb98cb87cb306e30163/FLAGf940d07f0 [2021-05-03 00:33:54,786 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:33:54,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark23_conjunctive.i [2021-05-03 00:33:54,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ef06139c/f2f9d280a2fe4fb98cb87cb306e30163/FLAGf940d07f0 [2021-05-03 00:33:55,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ef06139c/f2f9d280a2fe4fb98cb87cb306e30163 [2021-05-03 00:33:55,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:33:55,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:33:55,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:33:55,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:33:55,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:33:55,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:33:55" (1/1) ... [2021-05-03 00:33:55,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8f5b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55, skipping insertion in model container [2021-05-03 00:33:55,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:33:55" (1/1) ... [2021-05-03 00:33:55,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:33:55,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:33:55,352 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-zilu/benchmark23_conjunctive.i[873,886] [2021-05-03 00:33:55,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:33:55,375 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:33:55,412 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-zilu/benchmark23_conjunctive.i[873,886] [2021-05-03 00:33:55,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:33:55,449 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:33:55,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55 WrapperNode [2021-05-03 00:33:55,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:33:55,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:33:55,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:33:55,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:33:55,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55" (1/1) ... [2021-05-03 00:33:55,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55" (1/1) ... [2021-05-03 00:33:55,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55" (1/1) ... [2021-05-03 00:33:55,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55" (1/1) ... [2021-05-03 00:33:55,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55" (1/1) ... [2021-05-03 00:33:55,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55" (1/1) ... [2021-05-03 00:33:55,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55" (1/1) ... [2021-05-03 00:33:55,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:33:55,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:33:55,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:33:55,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:33:55,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55" (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 [2021-05-03 00:33:55,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:33:55,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:33:55,627 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:33:55,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:33:55,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:33:55,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:33:55,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-03 00:33:55,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-03 00:33:55,628 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:33:55,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:33:55,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:33:55,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-03 00:33:55,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:33:55,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:33:55,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:33:55,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:33:55,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:33:55,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:33:55,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:33:55,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:33:55,952 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:33:55,953 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:33:55,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:33:55 BoogieIcfgContainer [2021-05-03 00:33:55,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:33:55,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:33:55,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:33:55,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:33:55,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:33:55" (1/3) ... [2021-05-03 00:33:55,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f18cd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:33:55, skipping insertion in model container [2021-05-03 00:33:55,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:33:55" (2/3) ... [2021-05-03 00:33:55,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f18cd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:33:55, skipping insertion in model container [2021-05-03 00:33:55,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:33:55" (3/3) ... [2021-05-03 00:33:55,979 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2021-05-03 00:33:55,985 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:33:55,989 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:33:56,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:33:56,074 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:33:56,074 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:33:56,074 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:33:56,075 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:33:56,075 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:33:56,075 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:33:56,075 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:33:56,075 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:33:56,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:33:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:33:56,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:56,100 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:56,100 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:56,112 INFO L82 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2021-05-03 00:33:56,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:56,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201820780] [2021-05-03 00:33:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:56,192 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:33:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:56,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:56,475 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:56,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201820780] [2021-05-03 00:33:56,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201820780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:56,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:56,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:33:56,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682088849] [2021-05-03 00:33:56,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:33:56,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:56,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:33:56,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:33:56,500 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:56,622 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-03 00:33:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 00:33:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:33:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:56,630 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:33:56,631 INFO L226 Difference]: Without dead ends: 14 [2021-05-03 00:33:56,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:33:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-03 00:33:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-03 00:33:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-03 00:33:56,687 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-03 00:33:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:56,688 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-03 00:33:56,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-03 00:33:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 00:33:56,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:56,689 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:56,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:33:56,689 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:56,690 INFO L82 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2021-05-03 00:33:56,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:56,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043964777] [2021-05-03 00:33:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:56,745 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_8 100) InVars {main_~i~0=v_main_~i~0_8} OutVars{main_~i~0=v_main_~i~0_8} AuxVars[] AssignedVars[] [2021-05-03 00:33:56,768 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:33:56,775 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:33:56,816 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:33:56,852 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:33:56,874 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:33:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:57,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:57,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:33:57,261 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043964777] [2021-05-03 00:33:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043964777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:57,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:57,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 00:33:57,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283916523] [2021-05-03 00:33:57,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 00:33:57,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 00:33:57,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:33:57,265 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:57,423 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-03 00:33:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 00:33:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-03 00:33:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:57,424 INFO L225 Difference]: With dead ends: 20 [2021-05-03 00:33:57,424 INFO L226 Difference]: Without dead ends: 15 [2021-05-03 00:33:57,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:33:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-03 00:33:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-03 00:33:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-03 00:33:57,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-03 00:33:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:57,433 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-03 00:33:57,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-03 00:33:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:33:57,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:57,434 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:57,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:33:57,435 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:57,435 INFO L82 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 2 times [2021-05-03 00:33:57,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:57,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121456781] [2021-05-03 00:33:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:57,444 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_12 100) InVars {main_~i~0=v_main_~i~0_12} OutVars{main_~i~0=v_main_~i~0_12} AuxVars[] AssignedVars[] [2021-05-03 00:33:57,451 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:33:57,480 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:33:57,499 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:33:57,521 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:33:57,544 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:33:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:57,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:57,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:33:57,880 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:57,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121456781] [2021-05-03 00:33:57,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2121456781] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:57,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:57,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 00:33:57,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752766468] [2021-05-03 00:33:57,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 00:33:57,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:57,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 00:33:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 00:33:57,884 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:58,110 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-03 00:33:58,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:33:58,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-03 00:33:58,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:58,112 INFO L225 Difference]: With dead ends: 21 [2021-05-03 00:33:58,112 INFO L226 Difference]: Without dead ends: 16 [2021-05-03 00:33:58,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:33:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-03 00:33:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-03 00:33:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2021-05-03 00:33:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-03 00:33:58,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-03 00:33:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:58,123 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-03 00:33:58,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-03 00:33:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 00:33:58,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:58,124 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:58,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:33:58,124 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash -955485626, now seen corresponding path program 3 times [2021-05-03 00:33:58,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:58,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300970508] [2021-05-03 00:33:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:58,135 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_17 100) InVars {main_~i~0=v_main_~i~0_17} OutVars{main_~i~0=v_main_~i~0_17} AuxVars[] AssignedVars[] [2021-05-03 00:33:58,147 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:33:58,152 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:33:58,162 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:33:58,197 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:33:58,218 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:33:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:58,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:58,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:33:58,525 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:58,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300970508] [2021-05-03 00:33:58,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1300970508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:58,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:58,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:33:58,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755259583] [2021-05-03 00:33:58,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 00:33:58,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:58,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 00:33:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:33:58,529 INFO L87 Difference]: Start difference. First operand 16 states and 16 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) [2021-05-03 00:33:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:58,781 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-03 00:33:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:33:58,782 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 [2021-05-03 00:33:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:58,783 INFO L225 Difference]: With dead ends: 22 [2021-05-03 00:33:58,783 INFO L226 Difference]: Without dead ends: 17 [2021-05-03 00:33:58,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:33:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-03 00:33:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-03 00:33:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-03 00:33:58,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-05-03 00:33:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:58,795 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-03 00:33:58,795 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) [2021-05-03 00:33:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-03 00:33:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:33:58,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:58,796 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:58,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:33:58,798 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:58,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:58,798 INFO L82 PathProgramCache]: Analyzing trace with hash 480105496, now seen corresponding path program 4 times [2021-05-03 00:33:58,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:58,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159092567] [2021-05-03 00:33:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:58,806 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_23 100) InVars {main_~i~0=v_main_~i~0_23} OutVars{main_~i~0=v_main_~i~0_23} AuxVars[] AssignedVars[] [2021-05-03 00:33:58,813 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:33:58,818 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:33:58,827 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:33:58,854 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:33:58,874 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:33:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:58,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:59,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:33:59,148 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:59,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159092567] [2021-05-03 00:33:59,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [159092567] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:59,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:59,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-03 00:33:59,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042422192] [2021-05-03 00:33:59,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 00:33:59,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 00:33:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 00:33:59,151 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:33:59,442 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-03 00:33:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 00:33:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-03 00:33:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:33:59,444 INFO L225 Difference]: With dead ends: 23 [2021-05-03 00:33:59,444 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 00:33:59,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:33:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 00:33:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-03 00:33:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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) [2021-05-03 00:33:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-03 00:33:59,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-05-03 00:33:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:33:59,451 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-03 00:33:59,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:33:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-03 00:33:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:33:59,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:33:59,452 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:33:59,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 00:33:59,452 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:33:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:33:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2033757318, now seen corresponding path program 5 times [2021-05-03 00:33:59,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:33:59,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700358355] [2021-05-03 00:33:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:33:59,459 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_30 100) InVars {main_~i~0=v_main_~i~0_30} OutVars{main_~i~0=v_main_~i~0_30} AuxVars[] AssignedVars[] [2021-05-03 00:33:59,462 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:33:59,476 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:33:59,483 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:33:59,497 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:33:59,512 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:33:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:59,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:33:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:33:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:33:59,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:33:59,741 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:33:59,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700358355] [2021-05-03 00:33:59,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [700358355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:33:59,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:33:59,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:33:59,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133842092] [2021-05-03 00:33:59,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 00:33:59,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:33:59,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 00:33:59,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-03 00:33:59,743 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:00,055 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-03 00:34:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 00:34:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-03 00:34:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:00,057 INFO L225 Difference]: With dead ends: 24 [2021-05-03 00:34:00,057 INFO L226 Difference]: Without dead ends: 19 [2021-05-03 00:34:00,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 400.6ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:34:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-03 00:34:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-03 00:34:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-03 00:34:00,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-05-03 00:34:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:00,073 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-03 00:34:00,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-03 00:34:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:34:00,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:00,073 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:00,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 00:34:00,074 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:00,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1342643752, now seen corresponding path program 6 times [2021-05-03 00:34:00,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:00,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689586433] [2021-05-03 00:34:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:00,084 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_38 100) InVars {main_~i~0=v_main_~i~0_38} OutVars{main_~i~0=v_main_~i~0_38} AuxVars[] AssignedVars[] [2021-05-03 00:34:00,089 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:00,091 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:00,102 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:00,134 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:00,150 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:00,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:00,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:00,433 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:00,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689586433] [2021-05-03 00:34:00,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689586433] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:00,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:00,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-03 00:34:00,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037545862] [2021-05-03 00:34:00,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 00:34:00,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:00,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 00:34:00,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-03 00:34:00,435 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 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) [2021-05-03 00:34:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:00,800 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-03 00:34:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:34:00,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 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 [2021-05-03 00:34:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:00,802 INFO L225 Difference]: With dead ends: 25 [2021-05-03 00:34:00,802 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:34:00,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 462.4ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:34:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:34:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 00:34:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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) [2021-05-03 00:34:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-03 00:34:00,808 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-05-03 00:34:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:00,808 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-03 00:34:00,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 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) [2021-05-03 00:34:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-03 00:34:00,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 00:34:00,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:00,809 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:00,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 00:34:00,809 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:00,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1363105478, now seen corresponding path program 7 times [2021-05-03 00:34:00,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:00,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272702728] [2021-05-03 00:34:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:00,816 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_47 100) InVars {main_~i~0=v_main_~i~0_47} OutVars{main_~i~0=v_main_~i~0_47} AuxVars[] AssignedVars[] [2021-05-03 00:34:00,819 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:00,833 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:00,839 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:00,853 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:00,869 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:00,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:00,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:01,140 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:01,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272702728] [2021-05-03 00:34:01,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1272702728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:01,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:01,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-03 00:34:01,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463763005] [2021-05-03 00:34:01,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 00:34:01,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 00:34:01,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:34:01,142 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:01,535 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-03 00:34:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 00:34:01,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-03 00:34:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:01,537 INFO L225 Difference]: With dead ends: 26 [2021-05-03 00:34:01,537 INFO L226 Difference]: Without dead ends: 21 [2021-05-03 00:34:01,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:34:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-03 00:34:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-03 00:34:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-03 00:34:01,544 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-05-03 00:34:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:01,544 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-03 00:34:01,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-03 00:34:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 00:34:01,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:01,545 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:01,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 00:34:01,546 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:01,546 INFO L82 PathProgramCache]: Analyzing trace with hash -658014312, now seen corresponding path program 8 times [2021-05-03 00:34:01,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:01,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147580471] [2021-05-03 00:34:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:01,554 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_57 100) InVars {main_~i~0=v_main_~i~0_57} OutVars{main_~i~0=v_main_~i~0_57} AuxVars[] AssignedVars[] [2021-05-03 00:34:01,557 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:01,559 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:01,567 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:01,592 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:01,610 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:01,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:01,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:01,904 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:01,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147580471] [2021-05-03 00:34:01,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [147580471] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:01,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:01,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-03 00:34:01,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744669181] [2021-05-03 00:34:01,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 00:34:01,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 00:34:01,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 00:34:01,906 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:02,319 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-03 00:34:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 00:34:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-03 00:34:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:02,320 INFO L225 Difference]: With dead ends: 27 [2021-05-03 00:34:02,320 INFO L226 Difference]: Without dead ends: 22 [2021-05-03 00:34:02,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 529.4ms TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:34:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-03 00:34:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-03 00:34:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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) [2021-05-03 00:34:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-03 00:34:02,326 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-05-03 00:34:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:02,327 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-03 00:34:02,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-03 00:34:02,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 00:34:02,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:02,328 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:02,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 00:34:02,328 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:02,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:02,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1111781638, now seen corresponding path program 9 times [2021-05-03 00:34:02,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:02,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253168358] [2021-05-03 00:34:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:02,336 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_68 100) InVars {main_~i~0=v_main_~i~0_68} OutVars{main_~i~0=v_main_~i~0_68} AuxVars[] AssignedVars[] [2021-05-03 00:34:02,339 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:02,340 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:02,347 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:02,370 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:02,386 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:02,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:02,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:02,713 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:02,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253168358] [2021-05-03 00:34:02,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [253168358] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:02,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:02,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-03 00:34:02,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697067824] [2021-05-03 00:34:02,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 00:34:02,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:02,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 00:34:02,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-05-03 00:34:02,715 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 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) [2021-05-03 00:34:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:03,157 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-03 00:34:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 00:34:03,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 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 [2021-05-03 00:34:03,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:03,159 INFO L225 Difference]: With dead ends: 28 [2021-05-03 00:34:03,159 INFO L226 Difference]: Without dead ends: 23 [2021-05-03 00:34:03,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=232, Invalid=524, Unknown=0, NotChecked=0, Total=756 [2021-05-03 00:34:03,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-03 00:34:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-03 00:34:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-03 00:34:03,166 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-05-03 00:34:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:03,166 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-03 00:34:03,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 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) [2021-05-03 00:34:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-03 00:34:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:34:03,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:03,168 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:03,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 00:34:03,171 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:03,171 INFO L82 PathProgramCache]: Analyzing trace with hash 140881240, now seen corresponding path program 10 times [2021-05-03 00:34:03,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:03,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007374545] [2021-05-03 00:34:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:03,177 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_80 100) InVars {main_~i~0=v_main_~i~0_80} OutVars{main_~i~0=v_main_~i~0_80} AuxVars[] AssignedVars[] [2021-05-03 00:34:03,180 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:03,193 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:03,200 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:03,212 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:03,229 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:03,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:03,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:03,606 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:03,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007374545] [2021-05-03 00:34:03,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007374545] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:03,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:03,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-03 00:34:03,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218869174] [2021-05-03 00:34:03,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 00:34:03,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:03,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 00:34:03,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:34:03,608 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:04,100 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-03 00:34:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 00:34:04,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-03 00:34:04,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:04,102 INFO L225 Difference]: With dead ends: 29 [2021-05-03 00:34:04,102 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:34:04,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:34:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:34:04,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-03 00:34:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 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) [2021-05-03 00:34:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-03 00:34:04,111 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-05-03 00:34:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:04,112 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-03 00:34:04,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-03 00:34:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:34:04,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:04,113 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:04,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 00:34:04,113 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash 107739974, now seen corresponding path program 11 times [2021-05-03 00:34:04,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:04,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789458446] [2021-05-03 00:34:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:04,120 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_93 100) InVars {main_~i~0=v_main_~i~0_93} OutVars{main_~i~0=v_main_~i~0_93} AuxVars[] AssignedVars[] [2021-05-03 00:34:04,124 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:04,125 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:04,132 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:04,160 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:04,177 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:04,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:04,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:04,609 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:04,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789458446] [2021-05-03 00:34:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [789458446] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:04,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:04,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-03 00:34:04,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521877614] [2021-05-03 00:34:04,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 00:34:04,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 00:34:04,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-05-03 00:34:04,611 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:05,171 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-03 00:34:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 00:34:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-03 00:34:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:05,173 INFO L225 Difference]: With dead ends: 30 [2021-05-03 00:34:05,173 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:34:05,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 774.1ms TimeCoverageRelationStatistics Valid=311, Invalid=681, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:34:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:34:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-03 00:34:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-03 00:34:05,181 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-05-03 00:34:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:05,181 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-03 00:34:05,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-03 00:34:05,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 00:34:05,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:05,182 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:05,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 00:34:05,182 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:05,183 INFO L82 PathProgramCache]: Analyzing trace with hash -919639272, now seen corresponding path program 12 times [2021-05-03 00:34:05,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:05,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434471212] [2021-05-03 00:34:05,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:05,192 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_107 100) InVars {main_~i~0=v_main_~i~0_107} OutVars{main_~i~0=v_main_~i~0_107} AuxVars[] AssignedVars[] [2021-05-03 00:34:05,195 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:05,197 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:05,204 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:05,230 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:05,247 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:05,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:05,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:05,682 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:05,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434471212] [2021-05-03 00:34:05,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [434471212] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:05,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:05,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-03 00:34:05,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148013854] [2021-05-03 00:34:05,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 00:34:05,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:05,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 00:34:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:34:05,684 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 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) [2021-05-03 00:34:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:06,223 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-03 00:34:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 00:34:06,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 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 [2021-05-03 00:34:06,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:06,226 INFO L225 Difference]: With dead ends: 31 [2021-05-03 00:34:06,226 INFO L226 Difference]: Without dead ends: 26 [2021-05-03 00:34:06,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 767.8ms TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:34:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-03 00:34:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-03 00:34:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 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) [2021-05-03 00:34:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-03 00:34:06,234 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-05-03 00:34:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:06,234 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-03 00:34:06,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 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) [2021-05-03 00:34:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-03 00:34:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 00:34:06,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:06,235 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:06,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 00:34:06,236 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:06,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1591342470, now seen corresponding path program 13 times [2021-05-03 00:34:06,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:06,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882593609] [2021-05-03 00:34:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:06,242 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_122 100) InVars {main_~i~0=v_main_~i~0_122} OutVars{main_~i~0=v_main_~i~0_122} AuxVars[] AssignedVars[] [2021-05-03 00:34:06,245 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:06,246 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:06,254 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:06,282 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:06,298 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:06,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:06,741 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:06,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882593609] [2021-05-03 00:34:06,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1882593609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:06,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:06,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-03 00:34:06,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644301637] [2021-05-03 00:34:06,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 00:34:06,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 00:34:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-05-03 00:34:06,743 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:07,312 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-03 00:34:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 00:34:07,313 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-03 00:34:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:07,313 INFO L225 Difference]: With dead ends: 32 [2021-05-03 00:34:07,313 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:34:07,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 812.0ms TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 00:34:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:34:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-03 00:34:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-03 00:34:07,319 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-05-03 00:34:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:07,319 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-03 00:34:07,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-03 00:34:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 00:34:07,320 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:07,320 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:07,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 00:34:07,321 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:07,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2122365144, now seen corresponding path program 14 times [2021-05-03 00:34:07,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:07,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147683899] [2021-05-03 00:34:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:07,325 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_138 100) InVars {main_~i~0=v_main_~i~0_138} OutVars{main_~i~0=v_main_~i~0_138} AuxVars[] AssignedVars[] [2021-05-03 00:34:07,327 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:07,328 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:07,333 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:07,352 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:07,366 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:07,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:07,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:07,812 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147683899] [2021-05-03 00:34:07,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147683899] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:07,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:07,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-03 00:34:07,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775567167] [2021-05-03 00:34:07,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 00:34:07,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:07,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 00:34:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-05-03 00:34:07,814 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:08,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:08,448 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-03 00:34:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 00:34:08,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-03 00:34:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:08,452 INFO L225 Difference]: With dead ends: 33 [2021-05-03 00:34:08,452 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 00:34:08,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 877.8ms TimeCoverageRelationStatistics Valid=452, Invalid=954, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:34:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 00:34:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-03 00:34:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 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) [2021-05-03 00:34:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-03 00:34:08,460 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-05-03 00:34:08,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:08,460 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-03 00:34:08,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-03 00:34:08,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 00:34:08,461 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:08,461 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:08,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 00:34:08,461 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1404198854, now seen corresponding path program 15 times [2021-05-03 00:34:08,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:08,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921512077] [2021-05-03 00:34:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:08,467 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_155 100) InVars {main_~i~0=v_main_~i~0_155} OutVars{main_~i~0=v_main_~i~0_155} AuxVars[] AssignedVars[] [2021-05-03 00:34:08,470 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:08,473 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:08,484 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:08,515 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:08,531 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:08,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:08,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:09,001 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:09,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921512077] [2021-05-03 00:34:09,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1921512077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:09,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:09,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-03 00:34:09,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670348903] [2021-05-03 00:34:09,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 00:34:09,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:09,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 00:34:09,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-05-03 00:34:09,002 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 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) [2021-05-03 00:34:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:09,698 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-03 00:34:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 00:34:09,699 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 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 [2021-05-03 00:34:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:09,700 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:34:09,700 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:34:09,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 932.6ms TimeCoverageRelationStatistics Valid=505, Invalid=1055, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 00:34:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:34:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-03 00:34:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-03 00:34:09,708 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-05-03 00:34:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:09,708 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-03 00:34:09,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 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) [2021-05-03 00:34:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-03 00:34:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 00:34:09,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:09,709 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:09,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-03 00:34:09,709 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:09,710 INFO L82 PathProgramCache]: Analyzing trace with hash 615880344, now seen corresponding path program 16 times [2021-05-03 00:34:09,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:09,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920922799] [2021-05-03 00:34:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:09,715 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_173 100) InVars {main_~i~0=v_main_~i~0_173} OutVars{main_~i~0=v_main_~i~0_173} AuxVars[] AssignedVars[] [2021-05-03 00:34:09,718 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:09,731 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:09,738 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:09,750 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:09,766 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:09,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:09,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:10,294 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920922799] [2021-05-03 00:34:10,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [920922799] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:10,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:10,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-03 00:34:10,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702415026] [2021-05-03 00:34:10,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 00:34:10,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:10,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 00:34:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-05-03 00:34:10,297 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:11,001 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-03 00:34:11,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 00:34:11,002 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-03 00:34:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:11,003 INFO L225 Difference]: With dead ends: 35 [2021-05-03 00:34:11,003 INFO L226 Difference]: Without dead ends: 30 [2021-05-03 00:34:11,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1016.8ms TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:34:11,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-03 00:34:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-03 00:34:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 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) [2021-05-03 00:34:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-03 00:34:11,010 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-05-03 00:34:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:11,010 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-03 00:34:11,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-03 00:34:11,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 00:34:11,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:11,011 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:11,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-03 00:34:11,011 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:11,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:11,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1947810310, now seen corresponding path program 17 times [2021-05-03 00:34:11,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:11,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693570806] [2021-05-03 00:34:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:11,021 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_192 100) InVars {main_~i~0=v_main_~i~0_192} OutVars{main_~i~0=v_main_~i~0_192} AuxVars[] AssignedVars[] [2021-05-03 00:34:11,024 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:11,042 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:11,049 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:11,071 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:11,086 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:11,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:11,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:11,724 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:11,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693570806] [2021-05-03 00:34:11,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693570806] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:11,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:11,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-03 00:34:11,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691901017] [2021-05-03 00:34:11,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 00:34:11,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:11,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 00:34:11,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-05-03 00:34:11,726 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:12,481 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-03 00:34:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 00:34:12,482 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-03 00:34:12,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:12,482 INFO L225 Difference]: With dead ends: 36 [2021-05-03 00:34:12,482 INFO L226 Difference]: Without dead ends: 31 [2021-05-03 00:34:12,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1114.7ms TimeCoverageRelationStatistics Valid=620, Invalid=1272, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 00:34:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-03 00:34:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-03 00:34:12,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-03 00:34:12,490 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-05-03 00:34:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:12,490 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-03 00:34:12,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-03 00:34:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 00:34:12,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:12,491 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:12,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-03 00:34:12,492 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash 287966296, now seen corresponding path program 18 times [2021-05-03 00:34:12,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:12,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936489105] [2021-05-03 00:34:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:12,498 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_212 100) InVars {main_~i~0=v_main_~i~0_212} OutVars{main_~i~0=v_main_~i~0_212} AuxVars[] AssignedVars[] [2021-05-03 00:34:12,500 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:12,502 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:12,509 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:12,534 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:12,550 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:12,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:12,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:13,115 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:13,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936489105] [2021-05-03 00:34:13,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1936489105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:13,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:13,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-03 00:34:13,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473063003] [2021-05-03 00:34:13,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 00:34:13,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:13,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 00:34:13,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2021-05-03 00:34:13,117 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 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) [2021-05-03 00:34:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:13,901 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-03 00:34:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 00:34:13,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 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 [2021-05-03 00:34:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:13,902 INFO L225 Difference]: With dead ends: 37 [2021-05-03 00:34:13,902 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:34:13,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1141.7ms TimeCoverageRelationStatistics Valid=682, Invalid=1388, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 00:34:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:34:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-03 00:34:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 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) [2021-05-03 00:34:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-03 00:34:13,910 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-05-03 00:34:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:13,910 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-03 00:34:13,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 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) [2021-05-03 00:34:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-03 00:34:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 00:34:13,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:13,911 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:13,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-03 00:34:13,911 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash 372409414, now seen corresponding path program 19 times [2021-05-03 00:34:13,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:13,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722748379] [2021-05-03 00:34:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:13,917 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_233 100) InVars {main_~i~0=v_main_~i~0_233} OutVars{main_~i~0=v_main_~i~0_233} AuxVars[] AssignedVars[] [2021-05-03 00:34:13,919 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:13,932 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:13,937 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:13,948 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:13,962 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:14,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:14,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:14,547 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:14,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722748379] [2021-05-03 00:34:14,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1722748379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:14,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:14,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-03 00:34:14,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76360711] [2021-05-03 00:34:14,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 00:34:14,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 00:34:14,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-05-03 00:34:14,549 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:15,362 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-03 00:34:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 00:34:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-03 00:34:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:15,363 INFO L225 Difference]: With dead ends: 38 [2021-05-03 00:34:15,363 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 00:34:15,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1202.1ms TimeCoverageRelationStatistics Valid=747, Invalid=1509, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 00:34:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 00:34:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-03 00:34:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-03 00:34:15,369 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-05-03 00:34:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:15,369 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-03 00:34:15,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-03 00:34:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 00:34:15,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:15,370 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:15,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-03 00:34:15,371 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:15,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1304821224, now seen corresponding path program 20 times [2021-05-03 00:34:15,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:15,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913180517] [2021-05-03 00:34:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:15,377 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_255 100) InVars {main_~i~0=v_main_~i~0_255} OutVars{main_~i~0=v_main_~i~0_255} AuxVars[] AssignedVars[] [2021-05-03 00:34:15,379 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:15,391 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:15,396 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:15,407 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:15,430 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:15,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:15,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:16,110 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:16,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913180517] [2021-05-03 00:34:16,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [913180517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:16,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:16,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-03 00:34:16,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76991743] [2021-05-03 00:34:16,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 00:34:16,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:16,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 00:34:16,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2021-05-03 00:34:16,112 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:16,985 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-03 00:34:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 00:34:16,986 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-03 00:34:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:16,988 INFO L225 Difference]: With dead ends: 39 [2021-05-03 00:34:16,988 INFO L226 Difference]: Without dead ends: 34 [2021-05-03 00:34:16,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1381.3ms TimeCoverageRelationStatistics Valid=815, Invalid=1635, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:34:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-03 00:34:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-03 00:34:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 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) [2021-05-03 00:34:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-03 00:34:16,998 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-05-03 00:34:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:16,999 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-03 00:34:16,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-03 00:34:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 00:34:17,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:17,000 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:17,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-03 00:34:17,000 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1759363450, now seen corresponding path program 21 times [2021-05-03 00:34:17,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:17,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973268487] [2021-05-03 00:34:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:17,006 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_278 100) InVars {main_~i~0=v_main_~i~0_278} OutVars{main_~i~0=v_main_~i~0_278} AuxVars[] AssignedVars[] [2021-05-03 00:34:17,008 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:17,010 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:17,016 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:17,037 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:17,052 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:17,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:17,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:17,731 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973268487] [2021-05-03 00:34:17,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973268487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:17,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:17,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-03 00:34:17,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951630977] [2021-05-03 00:34:17,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 00:34:17,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 00:34:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2021-05-03 00:34:17,732 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 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) [2021-05-03 00:34:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:18,736 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-03 00:34:18,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 00:34:18,737 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 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 [2021-05-03 00:34:18,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:18,738 INFO L225 Difference]: With dead ends: 40 [2021-05-03 00:34:18,738 INFO L226 Difference]: Without dead ends: 35 [2021-05-03 00:34:18,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1415.2ms TimeCoverageRelationStatistics Valid=886, Invalid=1766, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 00:34:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-03 00:34:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-03 00:34:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-03 00:34:18,746 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-05-03 00:34:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:18,746 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-03 00:34:18,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 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) [2021-05-03 00:34:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-03 00:34:18,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 00:34:18,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:18,747 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:18,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-03 00:34:18,747 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:18,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:18,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1329696728, now seen corresponding path program 22 times [2021-05-03 00:34:18,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:18,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440328740] [2021-05-03 00:34:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:18,753 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_302 100) InVars {main_~i~0=v_main_~i~0_302} OutVars{main_~i~0=v_main_~i~0_302} AuxVars[] AssignedVars[] [2021-05-03 00:34:18,755 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:18,768 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:18,774 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:18,786 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:18,813 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:18,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:18,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:19,494 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:19,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440328740] [2021-05-03 00:34:19,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440328740] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:19,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:19,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-03 00:34:19,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145350076] [2021-05-03 00:34:19,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 00:34:19,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:19,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 00:34:19,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2021-05-03 00:34:19,496 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:20,448 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-03 00:34:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 00:34:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-03 00:34:20,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:20,449 INFO L225 Difference]: With dead ends: 41 [2021-05-03 00:34:20,449 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 00:34:20,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1422.4ms TimeCoverageRelationStatistics Valid=960, Invalid=1902, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 00:34:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 00:34:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-03 00:34:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 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) [2021-05-03 00:34:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-03 00:34:20,456 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-05-03 00:34:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:20,456 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-03 00:34:20,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-03 00:34:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 00:34:20,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:20,457 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:20,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-03 00:34:20,458 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:20,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1693685562, now seen corresponding path program 23 times [2021-05-03 00:34:20,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:20,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697639780] [2021-05-03 00:34:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:20,464 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_327 100) InVars {main_~i~0=v_main_~i~0_327} OutVars{main_~i~0=v_main_~i~0_327} AuxVars[] AssignedVars[] [2021-05-03 00:34:20,466 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:20,467 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:20,474 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:20,497 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:20,513 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:20,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:20,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:21,181 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697639780] [2021-05-03 00:34:21,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697639780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:21,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:21,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-03 00:34:21,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178773847] [2021-05-03 00:34:21,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 00:34:21,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:21,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 00:34:21,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2021-05-03 00:34:21,183 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:22,256 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-03 00:34:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 00:34:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-03 00:34:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:22,257 INFO L225 Difference]: With dead ends: 42 [2021-05-03 00:34:22,257 INFO L226 Difference]: Without dead ends: 37 [2021-05-03 00:34:22,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1505.5ms TimeCoverageRelationStatistics Valid=1037, Invalid=2043, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 00:34:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-03 00:34:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-03 00:34:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-03 00:34:22,265 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-05-03 00:34:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:22,265 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-03 00:34:22,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-03 00:34:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 00:34:22,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:22,266 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:22,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-03 00:34:22,266 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash -929256040, now seen corresponding path program 24 times [2021-05-03 00:34:22,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:22,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540924365] [2021-05-03 00:34:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:22,271 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_353 100) InVars {main_~i~0=v_main_~i~0_353} OutVars{main_~i~0=v_main_~i~0_353} AuxVars[] AssignedVars[] [2021-05-03 00:34:22,274 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:22,275 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:22,282 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:22,308 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:22,324 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:22,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:22,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:23,053 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:23,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540924365] [2021-05-03 00:34:23,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [540924365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:23,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:23,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-03 00:34:23,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47239565] [2021-05-03 00:34:23,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 00:34:23,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:23,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 00:34:23,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=665, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 00:34:23,054 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 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) [2021-05-03 00:34:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:24,113 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-03 00:34:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 00:34:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 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 [2021-05-03 00:34:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:24,114 INFO L225 Difference]: With dead ends: 43 [2021-05-03 00:34:24,114 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 00:34:24,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1529.4ms TimeCoverageRelationStatistics Valid=1117, Invalid=2189, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 00:34:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 00:34:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-03 00:34:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 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) [2021-05-03 00:34:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-03 00:34:24,125 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-05-03 00:34:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:24,126 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-03 00:34:24,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 29 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) [2021-05-03 00:34:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-03 00:34:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 00:34:24,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:24,126 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:24,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-03 00:34:24,126 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:24,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1293222662, now seen corresponding path program 25 times [2021-05-03 00:34:24,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:24,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859273792] [2021-05-03 00:34:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:24,131 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_380 100) InVars {main_~i~0=v_main_~i~0_380} OutVars{main_~i~0=v_main_~i~0_380} AuxVars[] AssignedVars[] [2021-05-03 00:34:24,134 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:24,148 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:24,154 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:24,164 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:24,178 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:24,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:24,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:24,946 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:24,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859273792] [2021-05-03 00:34:24,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [859273792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:24,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:24,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-03 00:34:24,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386848574] [2021-05-03 00:34:24,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 00:34:24,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:24,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 00:34:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=703, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 00:34:24,948 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:26,096 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-03 00:34:26,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 00:34:26,097 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-03 00:34:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:26,098 INFO L225 Difference]: With dead ends: 44 [2021-05-03 00:34:26,098 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 00:34:26,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1646.6ms TimeCoverageRelationStatistics Valid=1200, Invalid=2340, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 00:34:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 00:34:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-03 00:34:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-03 00:34:26,107 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-05-03 00:34:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:26,107 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-03 00:34:26,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-03 00:34:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 00:34:26,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:26,109 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:26,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-03 00:34:26,109 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:26,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1470585688, now seen corresponding path program 26 times [2021-05-03 00:34:26,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:26,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581847490] [2021-05-03 00:34:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:26,117 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_408 100) InVars {main_~i~0=v_main_~i~0_408} OutVars{main_~i~0=v_main_~i~0_408} AuxVars[] AssignedVars[] [2021-05-03 00:34:26,120 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:26,121 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:26,128 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:26,152 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:26,170 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:26,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:26,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:27,080 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:27,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581847490] [2021-05-03 00:34:27,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [581847490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:27,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:27,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-03 00:34:27,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726107839] [2021-05-03 00:34:27,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 00:34:27,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:27,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 00:34:27,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=742, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 00:34:27,082 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:28,321 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-03 00:34:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 00:34:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-03 00:34:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:28,322 INFO L225 Difference]: With dead ends: 45 [2021-05-03 00:34:28,322 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 00:34:28,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1889.9ms TimeCoverageRelationStatistics Valid=1286, Invalid=2496, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:34:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 00:34:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-03 00:34:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 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) [2021-05-03 00:34:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-03 00:34:28,328 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-05-03 00:34:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:28,329 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-03 00:34:28,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.0625) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-03 00:34:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 00:34:28,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:28,329 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:28,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-03 00:34:28,330 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1621095098, now seen corresponding path program 27 times [2021-05-03 00:34:28,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:28,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706068456] [2021-05-03 00:34:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:28,347 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_437 100) InVars {main_~i~0=v_main_~i~0_437} OutVars{main_~i~0=v_main_~i~0_437} AuxVars[] AssignedVars[] [2021-05-03 00:34:28,350 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:28,363 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:28,371 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:28,383 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:28,399 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:28,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:28,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:29,457 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:29,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706068456] [2021-05-03 00:34:29,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [706068456] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:29,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:29,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-03 00:34:29,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816846441] [2021-05-03 00:34:29,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 00:34:29,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:29,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 00:34:29,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 00:34:29,459 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 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) [2021-05-03 00:34:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:30,777 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-03 00:34:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 00:34:30,777 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 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 [2021-05-03 00:34:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:30,778 INFO L225 Difference]: With dead ends: 46 [2021-05-03 00:34:30,778 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 00:34:30,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 2125.6ms TimeCoverageRelationStatistics Valid=1375, Invalid=2657, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 00:34:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 00:34:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-03 00:34:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-03 00:34:30,785 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-05-03 00:34:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:30,785 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-03 00:34:30,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 32 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) [2021-05-03 00:34:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-03 00:34:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 00:34:30,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:30,786 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:30,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-03 00:34:30,786 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:30,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:30,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1321048344, now seen corresponding path program 28 times [2021-05-03 00:34:30,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:30,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847000350] [2021-05-03 00:34:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:30,793 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_467 100) InVars {main_~i~0=v_main_~i~0_467} OutVars{main_~i~0=v_main_~i~0_467} AuxVars[] AssignedVars[] [2021-05-03 00:34:30,795 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:30,807 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:30,815 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:30,826 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:30,840 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:30,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:30,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:31,761 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847000350] [2021-05-03 00:34:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [847000350] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:31,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:31,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-03 00:34:31,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502599681] [2021-05-03 00:34:31,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 00:34:31,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:31,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 00:34:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=823, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 00:34:31,763 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:33,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:33,115 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-03 00:34:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 00:34:33,116 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-03 00:34:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:33,116 INFO L225 Difference]: With dead ends: 47 [2021-05-03 00:34:33,116 INFO L226 Difference]: Without dead ends: 42 [2021-05-03 00:34:33,117 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2010.6ms TimeCoverageRelationStatistics Valid=1467, Invalid=2823, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 00:34:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-03 00:34:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-03 00:34:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 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) [2021-05-03 00:34:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-03 00:34:33,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-05-03 00:34:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:33,124 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-03 00:34:33,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-03 00:34:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 00:34:33,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:33,124 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:33,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-03 00:34:33,125 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1961785466, now seen corresponding path program 29 times [2021-05-03 00:34:33,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:33,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929914376] [2021-05-03 00:34:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:33,130 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_498 100) InVars {main_~i~0=v_main_~i~0_498} OutVars{main_~i~0=v_main_~i~0_498} AuxVars[] AssignedVars[] [2021-05-03 00:34:33,132 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:33,133 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:33,141 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:33,161 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:33,175 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:33,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:33,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:34,136 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:34,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929914376] [2021-05-03 00:34:34,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929914376] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:34,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:34,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-03 00:34:34,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708824572] [2021-05-03 00:34:34,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 00:34:34,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 00:34:34,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=865, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 00:34:34,138 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:35,495 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-03 00:34:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 00:34:35,496 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-03 00:34:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:35,496 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:34:35,496 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 00:34:35,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 2109.6ms TimeCoverageRelationStatistics Valid=1562, Invalid=2994, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 00:34:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 00:34:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-03 00:34:35,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-03 00:34:35,503 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-05-03 00:34:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:35,503 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-03 00:34:35,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-03 00:34:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 00:34:35,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:35,503 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:35,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-03 00:34:35,504 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:35,504 INFO L82 PathProgramCache]: Analyzing trace with hash -650418472, now seen corresponding path program 30 times [2021-05-03 00:34:35,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:35,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779396748] [2021-05-03 00:34:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:35,509 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_530 100) InVars {main_~i~0=v_main_~i~0_530} OutVars{main_~i~0=v_main_~i~0_530} AuxVars[] AssignedVars[] [2021-05-03 00:34:35,511 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:35,512 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:35,519 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:35,544 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:35,561 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:35,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:35,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:36,537 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:36,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779396748] [2021-05-03 00:34:36,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [779396748] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:36,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:36,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-03 00:34:36,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117237803] [2021-05-03 00:34:36,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 00:34:36,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 00:34:36,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=908, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 00:34:36,539 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 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) [2021-05-03 00:34:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:37,989 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-03 00:34:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 00:34:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 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 [2021-05-03 00:34:37,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:37,990 INFO L225 Difference]: With dead ends: 49 [2021-05-03 00:34:37,990 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 00:34:37,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 2130.1ms TimeCoverageRelationStatistics Valid=1660, Invalid=3170, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 00:34:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 00:34:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-03 00:34:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 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) [2021-05-03 00:34:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-03 00:34:37,999 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-05-03 00:34:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:37,999 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-03 00:34:37,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 35 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) [2021-05-03 00:34:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-03 00:34:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:34:37,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:37,999 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:38,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-03 00:34:38,000 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1347252678, now seen corresponding path program 31 times [2021-05-03 00:34:38,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:38,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745545898] [2021-05-03 00:34:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:38,006 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_563 100) InVars {main_~i~0=v_main_~i~0_563} OutVars{main_~i~0=v_main_~i~0_563} AuxVars[] AssignedVars[] [2021-05-03 00:34:38,009 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:38,019 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:38,025 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:38,035 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:38,049 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:38,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:38,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:39,058 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:39,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745545898] [2021-05-03 00:34:39,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [745545898] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:39,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:39,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-03 00:34:39,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386041639] [2021-05-03 00:34:39,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 00:34:39,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:39,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 00:34:39,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=952, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 00:34:39,060 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:40,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:40,531 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-03 00:34:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 00:34:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-03 00:34:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:40,533 INFO L225 Difference]: With dead ends: 50 [2021-05-03 00:34:40,533 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 00:34:40,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2281.1ms TimeCoverageRelationStatistics Valid=1761, Invalid=3351, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 00:34:40,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 00:34:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-03 00:34:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-03 00:34:40,541 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-05-03 00:34:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:40,541 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-03 00:34:40,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-03 00:34:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 00:34:40,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:40,542 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:40,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-03 00:34:40,542 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:40,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1149451112, now seen corresponding path program 32 times [2021-05-03 00:34:40,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:40,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656558865] [2021-05-03 00:34:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:40,548 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_597 100) InVars {main_~i~0=v_main_~i~0_597} OutVars{main_~i~0=v_main_~i~0_597} AuxVars[] AssignedVars[] [2021-05-03 00:34:40,553 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:40,554 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:40,562 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:40,584 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:40,599 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:40,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:40,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:41,660 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:41,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656558865] [2021-05-03 00:34:41,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [656558865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:41,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:41,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-03 00:34:41,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331247266] [2021-05-03 00:34:41,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 00:34:41,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:41,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 00:34:41,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=997, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 00:34:41,662 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:43,234 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-03 00:34:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 00:34:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-03 00:34:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:43,235 INFO L225 Difference]: With dead ends: 51 [2021-05-03 00:34:43,235 INFO L226 Difference]: Without dead ends: 46 [2021-05-03 00:34:43,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2356.7ms TimeCoverageRelationStatistics Valid=1865, Invalid=3537, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 00:34:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-03 00:34:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-03 00:34:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 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) [2021-05-03 00:34:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-03 00:34:43,243 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-05-03 00:34:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:43,243 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-03 00:34:43,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-03 00:34:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 00:34:43,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:43,244 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:43,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-03 00:34:43,244 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1237857274, now seen corresponding path program 33 times [2021-05-03 00:34:43,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:43,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263638407] [2021-05-03 00:34:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:43,251 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_632 100) InVars {main_~i~0=v_main_~i~0_632} OutVars{main_~i~0=v_main_~i~0_632} AuxVars[] AssignedVars[] [2021-05-03 00:34:43,253 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:43,263 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:43,269 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:43,279 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:43,293 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:43,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:43,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:44,385 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:44,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263638407] [2021-05-03 00:34:44,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [263638407] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:44,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:44,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-03 00:34:44,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064965403] [2021-05-03 00:34:44,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 00:34:44,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 00:34:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1043, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 00:34:44,386 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 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) [2021-05-03 00:34:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:45,986 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-03 00:34:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 00:34:45,986 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 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 [2021-05-03 00:34:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:45,987 INFO L225 Difference]: With dead ends: 52 [2021-05-03 00:34:45,987 INFO L226 Difference]: Without dead ends: 47 [2021-05-03 00:34:45,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2428.1ms TimeCoverageRelationStatistics Valid=1972, Invalid=3728, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 00:34:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-03 00:34:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-03 00:34:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-03 00:34:45,994 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-05-03 00:34:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:45,994 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-03 00:34:45,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 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) [2021-05-03 00:34:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-03 00:34:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-03 00:34:45,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:45,995 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:45,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-03 00:34:45,995 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash 316519000, now seen corresponding path program 34 times [2021-05-03 00:34:45,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:45,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434736597] [2021-05-03 00:34:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:46,001 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_668 100) InVars {main_~i~0=v_main_~i~0_668} OutVars{main_~i~0=v_main_~i~0_668} AuxVars[] AssignedVars[] [2021-05-03 00:34:46,002 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:46,003 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:46,008 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:46,029 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:46,043 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:46,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:46,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:47,274 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:47,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434736597] [2021-05-03 00:34:47,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434736597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:47,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:47,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-03 00:34:47,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066737396] [2021-05-03 00:34:47,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 00:34:47,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 00:34:47,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=1090, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 00:34:47,276 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:49,239 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-03 00:34:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 00:34:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-03 00:34:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:49,240 INFO L225 Difference]: With dead ends: 53 [2021-05-03 00:34:49,240 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 00:34:49,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 2870.3ms TimeCoverageRelationStatistics Valid=2082, Invalid=3924, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 00:34:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 00:34:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-03 00:34:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 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) [2021-05-03 00:34:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-03 00:34:49,248 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-05-03 00:34:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:49,248 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-03 00:34:49,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.05) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-03 00:34:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 00:34:49,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:49,249 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:49,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-03 00:34:49,249 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:49,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:49,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1257543238, now seen corresponding path program 35 times [2021-05-03 00:34:49,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:49,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949233796] [2021-05-03 00:34:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:49,257 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_705 100) InVars {main_~i~0=v_main_~i~0_705} OutVars{main_~i~0=v_main_~i~0_705} AuxVars[] AssignedVars[] [2021-05-03 00:34:49,270 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:49,285 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:49,293 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:49,309 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:49,326 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:49,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:49,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:50,595 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:50,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949233796] [2021-05-03 00:34:50,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949233796] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:50,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:50,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-03 00:34:50,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392047270] [2021-05-03 00:34:50,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 00:34:50,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:50,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 00:34:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=1138, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 00:34:50,597 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:52,596 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-03 00:34:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 00:34:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-03 00:34:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:52,597 INFO L225 Difference]: With dead ends: 54 [2021-05-03 00:34:52,597 INFO L226 Difference]: Without dead ends: 49 [2021-05-03 00:34:52,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2998.6ms TimeCoverageRelationStatistics Valid=2195, Invalid=4125, Unknown=0, NotChecked=0, Total=6320 [2021-05-03 00:34:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-03 00:34:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-03 00:34:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-03 00:34:52,603 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-05-03 00:34:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:52,603 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-03 00:34:52,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 40 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-03 00:34:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-03 00:34:52,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:52,603 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:52,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-03 00:34:52,604 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash 364523544, now seen corresponding path program 36 times [2021-05-03 00:34:52,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:52,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599044917] [2021-05-03 00:34:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:52,611 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_743 100) InVars {main_~i~0=v_main_~i~0_743} OutVars{main_~i~0=v_main_~i~0_743} AuxVars[] AssignedVars[] [2021-05-03 00:34:52,626 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:52,640 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:52,647 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:52,660 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:52,677 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:52,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:52,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:53,982 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:53,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599044917] [2021-05-03 00:34:53,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [599044917] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:53,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:53,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-03 00:34:53,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996380515] [2021-05-03 00:34:53,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-03 00:34:53,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:53,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-03 00:34:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=1187, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 00:34:53,984 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 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) [2021-05-03 00:34:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:56,010 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-03 00:34:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 00:34:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 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 [2021-05-03 00:34:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:56,011 INFO L225 Difference]: With dead ends: 55 [2021-05-03 00:34:56,011 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 00:34:56,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 3036.0ms TimeCoverageRelationStatistics Valid=2311, Invalid=4331, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 00:34:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 00:34:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-03 00:34:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 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) [2021-05-03 00:34:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-03 00:34:56,019 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-05-03 00:34:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:56,019 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-03 00:34:56,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 41 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) [2021-05-03 00:34:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-03 00:34:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-03 00:34:56,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:56,019 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:56,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-03 00:34:56,020 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:56,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1549283194, now seen corresponding path program 37 times [2021-05-03 00:34:56,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:56,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754860258] [2021-05-03 00:34:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:56,026 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_782 100) InVars {main_~i~0=v_main_~i~0_782} OutVars{main_~i~0=v_main_~i~0_782} AuxVars[] AssignedVars[] [2021-05-03 00:34:56,028 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:56,029 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:56,038 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:56,064 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:56,083 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:56,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:56,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:34:57,551 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:34:57,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754860258] [2021-05-03 00:34:57,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [754860258] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:34:57,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:34:57,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-03 00:34:57,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447624441] [2021-05-03 00:34:57,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 00:34:57,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:34:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 00:34:57,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=1237, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 00:34:57,553 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:34:59,662 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-03 00:34:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 00:34:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-03 00:34:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:34:59,663 INFO L225 Difference]: With dead ends: 56 [2021-05-03 00:34:59,663 INFO L226 Difference]: Without dead ends: 51 [2021-05-03 00:34:59,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3236.6ms TimeCoverageRelationStatistics Valid=2430, Invalid=4542, Unknown=0, NotChecked=0, Total=6972 [2021-05-03 00:34:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-03 00:34:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-03 00:34:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-03 00:34:59,669 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-05-03 00:34:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:34:59,669 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-03 00:34:59,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:34:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-03 00:34:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 00:34:59,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:34:59,670 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:34:59,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-03 00:34:59,670 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:34:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:34:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash -747749928, now seen corresponding path program 38 times [2021-05-03 00:34:59,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:34:59,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652761515] [2021-05-03 00:34:59,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:34:59,685 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_822 100) InVars {main_~i~0=v_main_~i~0_822} OutVars{main_~i~0=v_main_~i~0_822} AuxVars[] AssignedVars[] [2021-05-03 00:34:59,687 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:34:59,688 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:34:59,695 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:34:59,716 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:34:59,730 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:34:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:59,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:34:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:34:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:34:59,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:01,129 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:01,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652761515] [2021-05-03 00:35:01,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [652761515] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:01,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:01,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-03 00:35:01,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161534232] [2021-05-03 00:35:01,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-03 00:35:01,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:01,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-03 00:35:01,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=1288, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 00:35:01,130 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:03,327 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-03 00:35:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 00:35:03,328 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-03 00:35:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:03,328 INFO L225 Difference]: With dead ends: 57 [2021-05-03 00:35:03,328 INFO L226 Difference]: Without dead ends: 52 [2021-05-03 00:35:03,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3238.2ms TimeCoverageRelationStatistics Valid=2552, Invalid=4758, Unknown=0, NotChecked=0, Total=7310 [2021-05-03 00:35:03,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-03 00:35:03,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-03 00:35:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 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) [2021-05-03 00:35:03,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-03 00:35:03,336 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-05-03 00:35:03,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:03,337 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-03 00:35:03,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-03 00:35:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 00:35:03,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:03,337 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:03,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-03 00:35:03,338 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:03,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1670022458, now seen corresponding path program 39 times [2021-05-03 00:35:03,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:03,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054120702] [2021-05-03 00:35:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:03,346 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_863 100) InVars {main_~i~0=v_main_~i~0_863} OutVars{main_~i~0=v_main_~i~0_863} AuxVars[] AssignedVars[] [2021-05-03 00:35:03,348 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:03,350 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:03,357 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:03,383 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:03,402 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:03,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:03,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:05,069 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:05,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054120702] [2021-05-03 00:35:05,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1054120702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:05,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:05,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-03 00:35:05,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299229862] [2021-05-03 00:35:05,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-03 00:35:05,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:05,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-03 00:35:05,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=1340, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 00:35:05,070 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 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) [2021-05-03 00:35:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:07,190 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-03 00:35:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 00:35:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 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 [2021-05-03 00:35:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:07,192 INFO L225 Difference]: With dead ends: 58 [2021-05-03 00:35:07,192 INFO L226 Difference]: Without dead ends: 53 [2021-05-03 00:35:07,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 3510.4ms TimeCoverageRelationStatistics Valid=2677, Invalid=4979, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 00:35:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-03 00:35:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-03 00:35:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-03 00:35:07,200 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-05-03 00:35:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:07,201 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-03 00:35:07,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 44 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) [2021-05-03 00:35:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-03 00:35:07,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-03 00:35:07,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:07,201 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:07,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-03 00:35:07,202 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:07,202 INFO L82 PathProgramCache]: Analyzing trace with hash -195699816, now seen corresponding path program 40 times [2021-05-03 00:35:07,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:07,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743031436] [2021-05-03 00:35:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:07,208 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_905 100) InVars {main_~i~0=v_main_~i~0_905} OutVars{main_~i~0=v_main_~i~0_905} AuxVars[] AssignedVars[] [2021-05-03 00:35:07,210 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:07,224 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:07,231 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:07,245 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:07,265 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:07,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:07,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:08,810 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:08,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743031436] [2021-05-03 00:35:08,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [743031436] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:08,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:08,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-03 00:35:08,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939823885] [2021-05-03 00:35:08,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-03 00:35:08,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:08,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-03 00:35:08,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=1393, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 00:35:08,812 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:11,207 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-03 00:35:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 00:35:11,208 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-03 00:35:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:11,208 INFO L225 Difference]: With dead ends: 59 [2021-05-03 00:35:11,208 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 00:35:11,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 3604.0ms TimeCoverageRelationStatistics Valid=2805, Invalid=5205, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 00:35:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 00:35:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-03 00:35:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 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) [2021-05-03 00:35:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-03 00:35:11,215 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-05-03 00:35:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:11,215 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-03 00:35:11,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-03 00:35:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-03 00:35:11,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:11,216 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:11,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-03 00:35:11,216 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:11,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1736338170, now seen corresponding path program 41 times [2021-05-03 00:35:11,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:11,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600938997] [2021-05-03 00:35:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:11,226 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_948 100) InVars {main_~i~0=v_main_~i~0_948} OutVars{main_~i~0=v_main_~i~0_948} AuxVars[] AssignedVars[] [2021-05-03 00:35:11,229 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:11,230 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:11,237 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:11,261 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:11,277 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:11,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:11,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:12,981 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:12,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600938997] [2021-05-03 00:35:12,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1600938997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:12,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:12,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-03 00:35:12,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176737785] [2021-05-03 00:35:12,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-03 00:35:12,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:12,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-03 00:35:12,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1003, Invalid=1447, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 00:35:12,983 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:15,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:15,396 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-03 00:35:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 00:35:15,397 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-03 00:35:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:15,397 INFO L225 Difference]: With dead ends: 60 [2021-05-03 00:35:15,397 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 00:35:15,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 3748.4ms TimeCoverageRelationStatistics Valid=2936, Invalid=5436, Unknown=0, NotChecked=0, Total=8372 [2021-05-03 00:35:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 00:35:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-03 00:35:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-03 00:35:15,404 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-05-03 00:35:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:15,404 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-03 00:35:15,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 46 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-03 00:35:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-03 00:35:15,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:15,405 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:15,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-03 00:35:15,405 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2043480408, now seen corresponding path program 42 times [2021-05-03 00:35:15,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:15,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100836415] [2021-05-03 00:35:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:15,411 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_992 100) InVars {main_~i~0=v_main_~i~0_992} OutVars{main_~i~0=v_main_~i~0_992} AuxVars[] AssignedVars[] [2021-05-03 00:35:15,413 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:15,428 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:15,436 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:15,447 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:15,463 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:15,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:15,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:17,191 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:17,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100836415] [2021-05-03 00:35:17,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [100836415] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:17,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:17,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-03 00:35:17,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710261363] [2021-05-03 00:35:17,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-03 00:35:17,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:17,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-03 00:35:17,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1048, Invalid=1502, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 00:35:17,193 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 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) [2021-05-03 00:35:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:19,801 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-03 00:35:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 00:35:19,801 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 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 [2021-05-03 00:35:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:19,802 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:35:19,802 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 00:35:19,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 4026.5ms TimeCoverageRelationStatistics Valid=3070, Invalid=5672, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 00:35:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 00:35:19,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-03 00:35:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 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) [2021-05-03 00:35:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-03 00:35:19,809 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-05-03 00:35:19,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:19,810 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-03 00:35:19,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 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) [2021-05-03 00:35:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-03 00:35:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 00:35:19,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:19,811 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:19,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-03 00:35:19,811 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:19,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1041227962, now seen corresponding path program 43 times [2021-05-03 00:35:19,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:19,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226276617] [2021-05-03 00:35:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:19,825 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1037 100) InVars {main_~i~0=v_main_~i~0_1037} OutVars{main_~i~0=v_main_~i~0_1037} AuxVars[] AssignedVars[] [2021-05-03 00:35:19,827 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:19,843 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:19,854 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:19,873 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:19,897 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:19,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:19,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:21,804 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226276617] [2021-05-03 00:35:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226276617] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:21,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:21,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-03 00:35:21,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205543905] [2021-05-03 00:35:21,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-03 00:35:21,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:21,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-03 00:35:21,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1094, Invalid=1558, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 00:35:21,808 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:24,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:24,522 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-03 00:35:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 00:35:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-03 00:35:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:24,523 INFO L225 Difference]: With dead ends: 62 [2021-05-03 00:35:24,523 INFO L226 Difference]: Without dead ends: 57 [2021-05-03 00:35:24,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 4295.9ms TimeCoverageRelationStatistics Valid=3207, Invalid=5913, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 00:35:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-03 00:35:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-03 00:35:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-03 00:35:24,532 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-05-03 00:35:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:24,532 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-03 00:35:24,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 48 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:24,532 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-03 00:35:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-03 00:35:24,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:24,533 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:24,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-03 00:35:24,533 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:24,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:24,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2117060376, now seen corresponding path program 44 times [2021-05-03 00:35:24,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:24,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627631417] [2021-05-03 00:35:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:24,540 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1083 100) InVars {main_~i~0=v_main_~i~0_1083} OutVars{main_~i~0=v_main_~i~0_1083} AuxVars[] AssignedVars[] [2021-05-03 00:35:24,543 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:24,544 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:24,552 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:24,577 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:24,595 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:24,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:24,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:26,587 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:26,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627631417] [2021-05-03 00:35:26,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627631417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:26,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:26,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-03 00:35:26,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41594641] [2021-05-03 00:35:26,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-03 00:35:26,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:26,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-03 00:35:26,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1141, Invalid=1615, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 00:35:26,588 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:29,301 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-03 00:35:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 00:35:29,302 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-03 00:35:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:29,303 INFO L225 Difference]: With dead ends: 63 [2021-05-03 00:35:29,303 INFO L226 Difference]: Without dead ends: 58 [2021-05-03 00:35:29,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 4410.1ms TimeCoverageRelationStatistics Valid=3347, Invalid=6159, Unknown=0, NotChecked=0, Total=9506 [2021-05-03 00:35:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-03 00:35:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-03 00:35:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 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) [2021-05-03 00:35:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-03 00:35:29,314 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-05-03 00:35:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:29,314 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-03 00:35:29,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.04) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-03 00:35:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-03 00:35:29,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:29,315 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:29,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-03 00:35:29,315 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1239751046, now seen corresponding path program 45 times [2021-05-03 00:35:29,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:29,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574950177] [2021-05-03 00:35:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:29,324 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1130 100) InVars {main_~i~0=v_main_~i~0_1130} OutVars{main_~i~0=v_main_~i~0_1130} AuxVars[] AssignedVars[] [2021-05-03 00:35:29,327 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:29,340 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:29,348 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:29,361 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:29,377 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:29,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:29,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:31,566 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:31,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574950177] [2021-05-03 00:35:31,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [574950177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:31,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:31,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-03 00:35:31,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272132029] [2021-05-03 00:35:31,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-03 00:35:31,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:31,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-03 00:35:31,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1673, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 00:35:31,568 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 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) [2021-05-03 00:35:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:34,467 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-03 00:35:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 00:35:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 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 [2021-05-03 00:35:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:34,468 INFO L225 Difference]: With dead ends: 64 [2021-05-03 00:35:34,468 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 00:35:34,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 4796.3ms TimeCoverageRelationStatistics Valid=3490, Invalid=6410, Unknown=0, NotChecked=0, Total=9900 [2021-05-03 00:35:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 00:35:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-03 00:35:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-03 00:35:34,475 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-05-03 00:35:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:34,476 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-03 00:35:34,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 50 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) [2021-05-03 00:35:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-03 00:35:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-03 00:35:34,476 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:34,476 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:34,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-03 00:35:34,476 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash -187034408, now seen corresponding path program 46 times [2021-05-03 00:35:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:34,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75998168] [2021-05-03 00:35:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:34,483 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1178 100) InVars {main_~i~0=v_main_~i~0_1178} OutVars{main_~i~0=v_main_~i~0_1178} AuxVars[] AssignedVars[] [2021-05-03 00:35:34,485 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:34,486 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:34,493 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:34,523 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:34,543 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:34,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:34,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:36,630 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:36,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75998168] [2021-05-03 00:35:36,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [75998168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:36,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:36,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-03 00:35:36,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7460413] [2021-05-03 00:35:36,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-03 00:35:36,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:36,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-03 00:35:36,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1238, Invalid=1732, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 00:35:36,632 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:39,646 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-03 00:35:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 00:35:39,647 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-03 00:35:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:39,648 INFO L225 Difference]: With dead ends: 65 [2021-05-03 00:35:39,648 INFO L226 Difference]: Without dead ends: 60 [2021-05-03 00:35:39,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 4764.1ms TimeCoverageRelationStatistics Valid=3636, Invalid=6666, Unknown=0, NotChecked=0, Total=10302 [2021-05-03 00:35:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-03 00:35:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-03 00:35:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 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) [2021-05-03 00:35:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-03 00:35:39,658 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-05-03 00:35:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:39,658 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-03 00:35:39,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-03 00:35:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-03 00:35:39,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:39,658 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:39,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-03 00:35:39,659 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:39,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1467710522, now seen corresponding path program 47 times [2021-05-03 00:35:39,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:39,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617694188] [2021-05-03 00:35:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:39,664 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1227 100) InVars {main_~i~0=v_main_~i~0_1227} OutVars{main_~i~0=v_main_~i~0_1227} AuxVars[] AssignedVars[] [2021-05-03 00:35:39,666 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:39,668 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:39,674 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:39,696 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:39,713 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:39,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:39,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:41,985 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:41,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617694188] [2021-05-03 00:35:41,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617694188] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:41,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:41,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-03 00:35:41,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992708968] [2021-05-03 00:35:41,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-03 00:35:41,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:41,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-03 00:35:41,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1288, Invalid=1792, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 00:35:41,987 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:45,093 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-03 00:35:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 00:35:45,094 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-03 00:35:45,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:45,094 INFO L225 Difference]: With dead ends: 66 [2021-05-03 00:35:45,095 INFO L226 Difference]: Without dead ends: 61 [2021-05-03 00:35:45,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 4961.3ms TimeCoverageRelationStatistics Valid=3785, Invalid=6927, Unknown=0, NotChecked=0, Total=10712 [2021-05-03 00:35:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-03 00:35:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-03 00:35:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-03 00:35:45,105 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-05-03 00:35:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:45,105 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-03 00:35:45,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 52 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-03 00:35:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-03 00:35:45,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:45,106 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:45,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-03 00:35:45,106 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:45,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1781002904, now seen corresponding path program 48 times [2021-05-03 00:35:45,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:45,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524474964] [2021-05-03 00:35:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:45,112 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1277 100) InVars {main_~i~0=v_main_~i~0_1277} OutVars{main_~i~0=v_main_~i~0_1277} AuxVars[] AssignedVars[] [2021-05-03 00:35:45,115 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:45,129 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:45,135 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:45,148 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:45,166 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:45,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:45,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:47,428 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:47,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524474964] [2021-05-03 00:35:47,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [524474964] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:47,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:47,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-03 00:35:47,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408658241] [2021-05-03 00:35:47,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-03 00:35:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-03 00:35:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1339, Invalid=1853, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 00:35:47,429 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 53 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) [2021-05-03 00:35:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:51,444 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-03 00:35:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 00:35:51,446 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 53 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 [2021-05-03 00:35:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:51,446 INFO L225 Difference]: With dead ends: 67 [2021-05-03 00:35:51,446 INFO L226 Difference]: Without dead ends: 62 [2021-05-03 00:35:51,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 5766.8ms TimeCoverageRelationStatistics Valid=3937, Invalid=7193, Unknown=0, NotChecked=0, Total=11130 [2021-05-03 00:35:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-03 00:35:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-03 00:35:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 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) [2021-05-03 00:35:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-03 00:35:51,458 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-05-03 00:35:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:51,458 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-03 00:35:51,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 53 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) [2021-05-03 00:35:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-03 00:35:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-03 00:35:51,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:51,459 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:51,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-03 00:35:51,459 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:51,460 INFO L82 PathProgramCache]: Analyzing trace with hash -588095994, now seen corresponding path program 49 times [2021-05-03 00:35:51,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:51,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484080641] [2021-05-03 00:35:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:51,467 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1328 100) InVars {main_~i~0=v_main_~i~0_1328} OutVars{main_~i~0=v_main_~i~0_1328} AuxVars[] AssignedVars[] [2021-05-03 00:35:51,470 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:51,471 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:51,480 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:51,510 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:51,531 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:51,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:51,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:35:54,496 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:35:54,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484080641] [2021-05-03 00:35:54,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484080641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:35:54,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:35:54,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-03 00:35:54,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317982435] [2021-05-03 00:35:54,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-03 00:35:54,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:35:54,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-03 00:35:54,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1391, Invalid=1915, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 00:35:54,498 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:35:58,305 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-03 00:35:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 00:35:58,307 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-03 00:35:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:35:58,308 INFO L225 Difference]: With dead ends: 68 [2021-05-03 00:35:58,308 INFO L226 Difference]: Without dead ends: 63 [2021-05-03 00:35:58,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 6219.8ms TimeCoverageRelationStatistics Valid=4092, Invalid=7464, Unknown=0, NotChecked=0, Total=11556 [2021-05-03 00:35:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-03 00:35:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-03 00:35:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-03 00:35:58,318 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-05-03 00:35:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:35:58,318 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-03 00:35:58,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:35:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-03 00:35:58,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-03 00:35:58,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:35:58,319 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:35:58,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-03 00:35:58,319 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:35:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:35:58,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1015717800, now seen corresponding path program 50 times [2021-05-03 00:35:58,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:35:58,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560404027] [2021-05-03 00:35:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:35:58,326 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1380 100) InVars {main_~i~0=v_main_~i~0_1380} OutVars{main_~i~0=v_main_~i~0_1380} AuxVars[] AssignedVars[] [2021-05-03 00:35:58,329 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:35:58,330 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:35:58,337 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:35:58,364 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:35:58,385 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:35:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:58,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:35:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:35:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:35:58,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:02,212 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:02,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560404027] [2021-05-03 00:36:02,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [560404027] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:02,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:02,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-03 00:36:02,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893955719] [2021-05-03 00:36:02,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-03 00:36:02,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:02,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-03 00:36:02,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1444, Invalid=1978, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 00:36:02,215 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:06,342 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-03 00:36:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 00:36:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-03 00:36:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:06,344 INFO L225 Difference]: With dead ends: 69 [2021-05-03 00:36:06,344 INFO L226 Difference]: Without dead ends: 64 [2021-05-03 00:36:06,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 7581.1ms TimeCoverageRelationStatistics Valid=4250, Invalid=7740, Unknown=0, NotChecked=0, Total=11990 [2021-05-03 00:36:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-03 00:36:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-03 00:36:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 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) [2021-05-03 00:36:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-03 00:36:06,352 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-05-03 00:36:06,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:06,353 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-03 00:36:06,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-03 00:36:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-03 00:36:06,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:06,353 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:06,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-03 00:36:06,353 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:06,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1387091898, now seen corresponding path program 51 times [2021-05-03 00:36:06,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:06,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973700324] [2021-05-03 00:36:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:06,360 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1433 100) InVars {main_~i~0=v_main_~i~0_1433} OutVars{main_~i~0=v_main_~i~0_1433} AuxVars[] AssignedVars[] [2021-05-03 00:36:06,362 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:36:06,363 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:06,371 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:06,401 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:36:06,432 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:06,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:06,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:09,574 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:09,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973700324] [2021-05-03 00:36:09,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [973700324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:09,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:09,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-03 00:36:09,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861004736] [2021-05-03 00:36:09,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-03 00:36:09,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:09,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-03 00:36:09,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1498, Invalid=2042, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 00:36:09,578 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 56 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) [2021-05-03 00:36:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:14,321 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-03 00:36:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 00:36:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 56 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 [2021-05-03 00:36:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:14,322 INFO L225 Difference]: With dead ends: 70 [2021-05-03 00:36:14,322 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 00:36:14,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 7291.8ms TimeCoverageRelationStatistics Valid=4411, Invalid=8021, Unknown=0, NotChecked=0, Total=12432 [2021-05-03 00:36:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 00:36:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-03 00:36:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-03 00:36:14,332 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-05-03 00:36:14,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:14,332 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-03 00:36:14,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 56 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) [2021-05-03 00:36:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-03 00:36:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-03 00:36:14,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:14,333 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:14,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-03 00:36:14,333 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash -14787048, now seen corresponding path program 52 times [2021-05-03 00:36:14,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:14,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577962495] [2021-05-03 00:36:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:14,347 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1487 100) InVars {main_~i~0=v_main_~i~0_1487} OutVars{main_~i~0=v_main_~i~0_1487} AuxVars[] AssignedVars[] [2021-05-03 00:36:14,353 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:36:14,356 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:14,367 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:14,401 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:36:14,432 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:14,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:14,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:18,126 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:18,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577962495] [2021-05-03 00:36:18,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1577962495] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:18,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:18,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-03 00:36:18,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490267142] [2021-05-03 00:36:18,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-03 00:36:18,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-03 00:36:18,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1553, Invalid=2107, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 00:36:18,128 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:23,496 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-05-03 00:36:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 00:36:23,498 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-03 00:36:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:23,499 INFO L225 Difference]: With dead ends: 71 [2021-05-03 00:36:23,499 INFO L226 Difference]: Without dead ends: 66 [2021-05-03 00:36:23,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 8293.1ms TimeCoverageRelationStatistics Valid=4575, Invalid=8307, Unknown=0, NotChecked=0, Total=12882 [2021-05-03 00:36:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-03 00:36:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-03 00:36:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 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) [2021-05-03 00:36:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-03 00:36:23,509 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2021-05-03 00:36:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:23,509 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-03 00:36:23,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-03 00:36:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-03 00:36:23,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:23,510 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:23,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-03 00:36:23,510 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:23,510 INFO L82 PathProgramCache]: Analyzing trace with hash -423009658, now seen corresponding path program 53 times [2021-05-03 00:36:23,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:23,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799830852] [2021-05-03 00:36:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:23,516 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1542 100) InVars {main_~i~0=v_main_~i~0_1542} OutVars{main_~i~0=v_main_~i~0_1542} AuxVars[] AssignedVars[] [2021-05-03 00:36:23,519 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:36:23,536 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:23,546 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:23,568 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:36:23,598 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:23,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:23,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:26,862 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:26,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799830852] [2021-05-03 00:36:26,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [799830852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:26,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:26,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-03 00:36:26,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308993334] [2021-05-03 00:36:26,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-03 00:36:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-03 00:36:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1609, Invalid=2173, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 00:36:26,864 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:31,567 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-03 00:36:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 00:36:31,569 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-03 00:36:31,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:31,570 INFO L225 Difference]: With dead ends: 72 [2021-05-03 00:36:31,570 INFO L226 Difference]: Without dead ends: 67 [2021-05-03 00:36:31,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 7405.1ms TimeCoverageRelationStatistics Valid=4742, Invalid=8598, Unknown=0, NotChecked=0, Total=13340 [2021-05-03 00:36:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-03 00:36:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-03 00:36:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-03 00:36:31,579 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-05-03 00:36:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:31,579 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-03 00:36:31,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-03 00:36:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-03 00:36:31,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:31,580 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:31,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-03 00:36:31,580 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:31,580 INFO L82 PathProgramCache]: Analyzing trace with hash -193008680, now seen corresponding path program 54 times [2021-05-03 00:36:31,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:31,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378835413] [2021-05-03 00:36:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:31,587 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1598 100) InVars {main_~i~0=v_main_~i~0_1598} OutVars{main_~i~0=v_main_~i~0_1598} AuxVars[] AssignedVars[] [2021-05-03 00:36:31,590 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:36:31,606 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:31,614 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:31,633 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:36:31,655 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:31,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:31,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:34,827 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:34,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378835413] [2021-05-03 00:36:34,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [378835413] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:34,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:34,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-03 00:36:34,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79129658] [2021-05-03 00:36:34,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-03 00:36:34,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:34,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-03 00:36:34,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1666, Invalid=2240, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 00:36:34,830 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 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) [2021-05-03 00:36:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:40,802 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-05-03 00:36:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 00:36:40,803 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 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 [2021-05-03 00:36:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:40,804 INFO L225 Difference]: With dead ends: 73 [2021-05-03 00:36:40,804 INFO L226 Difference]: Without dead ends: 68 [2021-05-03 00:36:40,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 8469.2ms TimeCoverageRelationStatistics Valid=4912, Invalid=8894, Unknown=0, NotChecked=0, Total=13806 [2021-05-03 00:36:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-03 00:36:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-03 00:36:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 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) [2021-05-03 00:36:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-05-03 00:36:40,813 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-05-03 00:36:40,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:40,814 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-05-03 00:36:40,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 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) [2021-05-03 00:36:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-05-03 00:36:40,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-03 00:36:40,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:40,814 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:40,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-03 00:36:40,815 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:40,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:40,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1652912954, now seen corresponding path program 55 times [2021-05-03 00:36:40,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:40,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306626534] [2021-05-03 00:36:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:40,831 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1655 100) InVars {main_~i~0=v_main_~i~0_1655} OutVars{main_~i~0=v_main_~i~0_1655} AuxVars[] AssignedVars[] [2021-05-03 00:36:40,833 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:36:40,851 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:40,859 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:40,876 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:36:40,904 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:41,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:41,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:45,475 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:45,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306626534] [2021-05-03 00:36:45,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [306626534] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:45,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:45,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-03 00:36:45,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936038713] [2021-05-03 00:36:45,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-03 00:36:45,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:45,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-03 00:36:45,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1724, Invalid=2308, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 00:36:45,477 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:52,001 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-03 00:36:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 00:36:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-03 00:36:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:52,004 INFO L225 Difference]: With dead ends: 74 [2021-05-03 00:36:52,004 INFO L226 Difference]: Without dead ends: 69 [2021-05-03 00:36:52,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 10342.4ms TimeCoverageRelationStatistics Valid=5085, Invalid=9195, Unknown=0, NotChecked=0, Total=14280 [2021-05-03 00:36:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-03 00:36:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-03 00:36:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-03 00:36:52,014 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2021-05-03 00:36:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:52,014 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-03 00:36:52,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:36:52,014 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-03 00:36:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-03 00:36:52,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:52,015 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:52,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-03 00:36:52,015 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:52,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:52,016 INFO L82 PathProgramCache]: Analyzing trace with hash 334694808, now seen corresponding path program 56 times [2021-05-03 00:36:52,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:52,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365558967] [2021-05-03 00:36:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:52,025 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1713 100) InVars {main_~i~0=v_main_~i~0_1713} OutVars{main_~i~0=v_main_~i~0_1713} AuxVars[] AssignedVars[] [2021-05-03 00:36:52,029 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:36:52,048 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:36:52,059 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:36:52,078 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:36:52,108 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:36:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:52,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:36:52,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:36:56,913 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:56,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365558967] [2021-05-03 00:36:56,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [365558967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:56,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:56,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-03 00:36:56,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723953809] [2021-05-03 00:36:56,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-03 00:36:56,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:56,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-03 00:36:56,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1783, Invalid=2377, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 00:36:56,916 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:03,587 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-05-03 00:37:03,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 00:37:03,589 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-03 00:37:03,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:03,590 INFO L225 Difference]: With dead ends: 75 [2021-05-03 00:37:03,590 INFO L226 Difference]: Without dead ends: 70 [2021-05-03 00:37:03,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 10965.8ms TimeCoverageRelationStatistics Valid=5261, Invalid=9501, Unknown=0, NotChecked=0, Total=14762 [2021-05-03 00:37:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-03 00:37:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-03 00:37:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 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) [2021-05-03 00:37:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-05-03 00:37:03,601 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2021-05-03 00:37:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:03,601 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-05-03 00:37:03,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-05-03 00:37:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-03 00:37:03,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:03,602 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:03,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-03 00:37:03,602 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:03,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1820993286, now seen corresponding path program 57 times [2021-05-03 00:37:03,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:03,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857534252] [2021-05-03 00:37:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:03,612 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1772 100) InVars {main_~i~0=v_main_~i~0_1772} OutVars{main_~i~0=v_main_~i~0_1772} AuxVars[] AssignedVars[] [2021-05-03 00:37:03,615 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:37:03,638 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:03,653 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:37:03,677 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:37:03,706 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:37:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:03,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:03,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:10,147 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:10,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857534252] [2021-05-03 00:37:10,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857534252] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:10,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:10,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-03 00:37:10,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306049324] [2021-05-03 00:37:10,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-03 00:37:10,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:10,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-03 00:37:10,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1843, Invalid=2447, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 00:37:10,151 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 62 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) [2021-05-03 00:37:18,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:18,196 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-03 00:37:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 00:37:18,198 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 62 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 [2021-05-03 00:37:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:18,198 INFO L225 Difference]: With dead ends: 76 [2021-05-03 00:37:18,198 INFO L226 Difference]: Without dead ends: 71 [2021-05-03 00:37:18,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 13495.6ms TimeCoverageRelationStatistics Valid=5440, Invalid=9812, Unknown=0, NotChecked=0, Total=15252 [2021-05-03 00:37:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-03 00:37:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-03 00:37:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-03 00:37:18,212 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2021-05-03 00:37:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:18,212 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-03 00:37:18,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 62 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) [2021-05-03 00:37:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-03 00:37:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-03 00:37:18,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:18,212 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:18,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-03 00:37:18,213 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:18,213 INFO L82 PathProgramCache]: Analyzing trace with hash 651605848, now seen corresponding path program 58 times [2021-05-03 00:37:18,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:18,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615778866] [2021-05-03 00:37:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:18,220 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1832 100) InVars {main_~i~0=v_main_~i~0_1832} OutVars{main_~i~0=v_main_~i~0_1832} AuxVars[] AssignedVars[] [2021-05-03 00:37:18,223 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:37:18,250 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:18,267 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:37:18,293 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:37:18,327 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:37:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:18,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:18,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:25,166 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:25,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615778866] [2021-05-03 00:37:25,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [615778866] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:25,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:25,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-03 00:37:25,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768607939] [2021-05-03 00:37:25,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-03 00:37:25,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:25,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-03 00:37:25,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1904, Invalid=2518, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 00:37:25,168 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:35,704 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-05-03 00:37:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 00:37:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-03 00:37:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:35,708 INFO L225 Difference]: With dead ends: 77 [2021-05-03 00:37:35,708 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 00:37:35,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 16130.9ms TimeCoverageRelationStatistics Valid=5622, Invalid=10128, Unknown=0, NotChecked=0, Total=15750 [2021-05-03 00:37:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 00:37:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-03 00:37:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 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) [2021-05-03 00:37:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-05-03 00:37:35,719 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2021-05-03 00:37:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:35,719 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-05-03 00:37:35,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 64 states have (on average 1.03125) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-05-03 00:37:35,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-03 00:37:35,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:35,720 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:35,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-03 00:37:35,721 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1239666362, now seen corresponding path program 59 times [2021-05-03 00:37:35,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:35,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862064755] [2021-05-03 00:37:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:35,731 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1893 100) InVars {main_~i~0=v_main_~i~0_1893} OutVars{main_~i~0=v_main_~i~0_1893} AuxVars[] AssignedVars[] [2021-05-03 00:37:35,734 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:37:35,769 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:35,790 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:37:35,820 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:37:35,871 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:37:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:36,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:36,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:42,774 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:42,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862064755] [2021-05-03 00:37:42,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [862064755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:42,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:42,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-03 00:37:42,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165489653] [2021-05-03 00:37:42,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-03 00:37:42,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:42,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-03 00:37:42,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1966, Invalid=2590, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 00:37:42,776 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 64 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:52,517 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-03 00:37:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 00:37:52,521 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 64 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-03 00:37:52,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:52,521 INFO L225 Difference]: With dead ends: 78 [2021-05-03 00:37:52,522 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 00:37:52,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 15633.7ms TimeCoverageRelationStatistics Valid=5807, Invalid=10449, Unknown=0, NotChecked=0, Total=16256 [2021-05-03 00:37:52,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 00:37:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-03 00:37:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-03 00:37:52,532 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2021-05-03 00:37:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:52,532 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-03 00:37:52,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 64 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:37:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-03 00:37:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-03 00:37:52,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:52,533 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:52,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-03 00:37:52,533 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash 260437272, now seen corresponding path program 60 times [2021-05-03 00:37:52,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:52,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631926631] [2021-05-03 00:37:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:52,542 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_1955 100) InVars {main_~i~0=v_main_~i~0_1955} OutVars{main_~i~0=v_main_~i~0_1955} AuxVars[] AssignedVars[] [2021-05-03 00:37:52,555 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:37:52,591 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:52,606 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:37:52,636 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:37:52,678 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:37:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:52,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:37:52,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:00,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:38:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631926631] [2021-05-03 00:38:00,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [631926631] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:38:00,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:38:00,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-03 00:38:00,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488655320] [2021-05-03 00:38:00,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-03 00:38:00,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:38:00,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-03 00:38:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2029, Invalid=2663, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 00:38:00,236 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 65 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) [2021-05-03 00:38:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:38:07,887 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-05-03 00:38:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 00:38:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 65 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 [2021-05-03 00:38:07,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:38:07,890 INFO L225 Difference]: With dead ends: 79 [2021-05-03 00:38:07,890 INFO L226 Difference]: Without dead ends: 74 [2021-05-03 00:38:07,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 14469.4ms TimeCoverageRelationStatistics Valid=5995, Invalid=10775, Unknown=0, NotChecked=0, Total=16770 [2021-05-03 00:38:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-03 00:38:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-03 00:38:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 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) [2021-05-03 00:38:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-05-03 00:38:07,903 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2021-05-03 00:38:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:38:07,903 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-05-03 00:38:07,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 65 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) [2021-05-03 00:38:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-05-03 00:38:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-03 00:38:07,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:07,904 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:07,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-03 00:38:07,904 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:07,905 INFO L82 PathProgramCache]: Analyzing trace with hash -480990330, now seen corresponding path program 61 times [2021-05-03 00:38:07,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:07,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509963503] [2021-05-03 00:38:07,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:07,914 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2018 100) InVars {main_~i~0=v_main_~i~0_2018} OutVars{main_~i~0=v_main_~i~0_2018} AuxVars[] AssignedVars[] [2021-05-03 00:38:07,917 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:38:07,951 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:38:07,965 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:38:07,994 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:38:08,049 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:38:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:08,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:38:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:38:08,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:14,650 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:38:14,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509963503] [2021-05-03 00:38:14,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [509963503] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:38:14,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:38:14,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-03 00:38:14,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794207545] [2021-05-03 00:38:14,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-03 00:38:14,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:38:14,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-03 00:38:14,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2093, Invalid=2737, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 00:38:14,652 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:38:21,662 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-03 00:38:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 00:38:21,663 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-03 00:38:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:38:21,663 INFO L225 Difference]: With dead ends: 80 [2021-05-03 00:38:21,663 INFO L226 Difference]: Without dead ends: 75 [2021-05-03 00:38:21,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 13054.4ms TimeCoverageRelationStatistics Valid=6186, Invalid=11106, Unknown=0, NotChecked=0, Total=17292 [2021-05-03 00:38:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-03 00:38:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-03 00:38:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-03 00:38:21,677 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2021-05-03 00:38:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:38:21,677 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-03 00:38:21,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 66 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-03 00:38:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-03 00:38:21,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:21,678 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:21,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-03 00:38:21,678 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:21,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:21,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1990409512, now seen corresponding path program 62 times [2021-05-03 00:38:21,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:21,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472355788] [2021-05-03 00:38:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:21,688 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2082 100) InVars {main_~i~0=v_main_~i~0_2082} OutVars{main_~i~0=v_main_~i~0_2082} AuxVars[] AssignedVars[] [2021-05-03 00:38:21,696 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:38:21,716 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:38:21,727 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:38:21,747 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:38:21,781 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:38:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:21,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:38:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:38:21,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:28,848 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:38:28,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472355788] [2021-05-03 00:38:28,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [472355788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:38:28,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:38:28,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-03 00:38:28,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867376745] [2021-05-03 00:38:28,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-03 00:38:28,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:38:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-03 00:38:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2158, Invalid=2812, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 00:38:28,851 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:29,077 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 00:38:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:38:39,529 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-05-03 00:38:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 00:38:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-03 00:38:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:38:39,533 INFO L225 Difference]: With dead ends: 81 [2021-05-03 00:38:39,533 INFO L226 Difference]: Without dead ends: 76 [2021-05-03 00:38:39,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 17033.4ms TimeCoverageRelationStatistics Valid=6380, Invalid=11442, Unknown=0, NotChecked=0, Total=17822 [2021-05-03 00:38:39,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-03 00:38:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-03 00:38:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 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) [2021-05-03 00:38:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-05-03 00:38:39,545 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2021-05-03 00:38:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:38:39,545 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-05-03 00:38:39,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:38:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-05-03 00:38:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-03 00:38:39,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:38:39,546 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:38:39,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-03 00:38:39,547 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:38:39,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:38:39,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1537763898, now seen corresponding path program 63 times [2021-05-03 00:38:39,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:38:39,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687691136] [2021-05-03 00:38:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:38:39,557 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2147 100) InVars {main_~i~0=v_main_~i~0_2147} OutVars{main_~i~0=v_main_~i~0_2147} AuxVars[] AssignedVars[] [2021-05-03 00:38:39,560 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:38:39,593 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:38:39,611 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:38:39,647 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:38:39,691 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:38:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:39,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:38:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:38:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:38:39,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:38:48,680 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:38:48,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687691136] [2021-05-03 00:38:48,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687691136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:38:48,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:38:48,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-03 00:38:48,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784556186] [2021-05-03 00:38:48,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-03 00:38:48,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:38:48,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-03 00:38:48,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2224, Invalid=2888, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 00:38:48,683 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 68 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) [2021-05-03 00:38:48,988 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 00:39:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:02,231 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-03 00:39:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 00:39:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 68 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 [2021-05-03 00:39:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:02,236 INFO L225 Difference]: With dead ends: 82 [2021-05-03 00:39:02,236 INFO L226 Difference]: Without dead ends: 77 [2021-05-03 00:39:02,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 21671.4ms TimeCoverageRelationStatistics Valid=6577, Invalid=11783, Unknown=0, NotChecked=0, Total=18360 [2021-05-03 00:39:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-03 00:39:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-03 00:39:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-03 00:39:02,248 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2021-05-03 00:39:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:02,248 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-03 00:39:02,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 68 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) [2021-05-03 00:39:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-03 00:39:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-03 00:39:02,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:02,249 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:02,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-03 00:39:02,249 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:02,250 INFO L82 PathProgramCache]: Analyzing trace with hash -390651752, now seen corresponding path program 64 times [2021-05-03 00:39:02,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:02,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411869817] [2021-05-03 00:39:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:02,259 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2213 100) InVars {main_~i~0=v_main_~i~0_2213} OutVars{main_~i~0=v_main_~i~0_2213} AuxVars[] AssignedVars[] [2021-05-03 00:39:02,265 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:39:02,292 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:39:02,310 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:39:02,337 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:39:02,392 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:39:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:02,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:02,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:10,717 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:10,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411869817] [2021-05-03 00:39:10,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [411869817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:10,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:10,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-03 00:39:10,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650319658] [2021-05-03 00:39:10,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-03 00:39:10,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-03 00:39:10,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2291, Invalid=2965, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 00:39:10,719 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:21,849 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-05-03 00:39:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 00:39:21,853 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-03 00:39:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:21,854 INFO L225 Difference]: With dead ends: 83 [2021-05-03 00:39:21,854 INFO L226 Difference]: Without dead ends: 78 [2021-05-03 00:39:21,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 18592.2ms TimeCoverageRelationStatistics Valid=6777, Invalid=12129, Unknown=0, NotChecked=0, Total=18906 [2021-05-03 00:39:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-03 00:39:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-03 00:39:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 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) [2021-05-03 00:39:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-05-03 00:39:21,864 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2021-05-03 00:39:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:21,865 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-05-03 00:39:21,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-05-03 00:39:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-03 00:39:21,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:21,866 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:21,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-03 00:39:21,866 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:21,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:21,866 INFO L82 PathProgramCache]: Analyzing trace with hash 810086406, now seen corresponding path program 65 times [2021-05-03 00:39:21,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:21,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410332172] [2021-05-03 00:39:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:21,878 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2280 100) InVars {main_~i~0=v_main_~i~0_2280} OutVars{main_~i~0=v_main_~i~0_2280} AuxVars[] AssignedVars[] [2021-05-03 00:39:21,882 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:39:21,885 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:39:21,905 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:39:21,973 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:39:22,037 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:39:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:22,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:22,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:33,055 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:33,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410332172] [2021-05-03 00:39:33,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [410332172] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:33,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:33,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-03 00:39:33,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133282830] [2021-05-03 00:39:33,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-03 00:39:33,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:33,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-03 00:39:33,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2359, Invalid=3043, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 00:39:33,059 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 70 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:33,549 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 00:39:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:45,732 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-03 00:39:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 00:39:45,735 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 70 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-03 00:39:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:45,736 INFO L225 Difference]: With dead ends: 84 [2021-05-03 00:39:45,736 INFO L226 Difference]: Without dead ends: 79 [2021-05-03 00:39:45,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 22488.8ms TimeCoverageRelationStatistics Valid=6980, Invalid=12480, Unknown=0, NotChecked=0, Total=19460 [2021-05-03 00:39:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-03 00:39:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-03 00:39:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-03 00:39:45,749 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2021-05-03 00:39:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:45,749 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-03 00:39:45,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 70 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-03 00:39:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-03 00:39:45,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:45,750 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:45,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-03 00:39:45,751 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash -621736360, now seen corresponding path program 66 times [2021-05-03 00:39:45,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:45,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627765767] [2021-05-03 00:39:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:45,762 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2348 100) InVars {main_~i~0=v_main_~i~0_2348} OutVars{main_~i~0=v_main_~i~0_2348} AuxVars[] AssignedVars[] [2021-05-03 00:39:45,769 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:39:45,795 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:39:45,810 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:39:45,838 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:39:45,887 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:39:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:46,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:46,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:39:55,882 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:55,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627765767] [2021-05-03 00:39:55,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627765767] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:55,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:55,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-03 00:39:55,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098203700] [2021-05-03 00:39:55,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-03 00:39:55,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:55,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-03 00:39:55,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2428, Invalid=3122, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 00:39:55,884 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 71 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) [2021-05-03 00:39:56,346 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 00:40:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:40:06,670 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-05-03 00:40:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 00:40:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 71 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 [2021-05-03 00:40:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:40:06,673 INFO L225 Difference]: With dead ends: 85 [2021-05-03 00:40:06,673 INFO L226 Difference]: Without dead ends: 80 [2021-05-03 00:40:06,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 19547.6ms TimeCoverageRelationStatistics Valid=7186, Invalid=12836, Unknown=0, NotChecked=0, Total=20022 [2021-05-03 00:40:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-03 00:40:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-03 00:40:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 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) [2021-05-03 00:40:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-05-03 00:40:06,686 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2021-05-03 00:40:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:40:06,687 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-05-03 00:40:06,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 71 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) [2021-05-03 00:40:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-05-03 00:40:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-03 00:40:06,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:40:06,687 INFO L523 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:40:06,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-03 00:40:06,688 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:40:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:40:06,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2058569146, now seen corresponding path program 67 times [2021-05-03 00:40:06,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:40:06,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002443343] [2021-05-03 00:40:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:40:06,697 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2417 100) InVars {main_~i~0=v_main_~i~0_2417} OutVars{main_~i~0=v_main_~i~0_2417} AuxVars[] AssignedVars[] [2021-05-03 00:40:06,699 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:40:06,701 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:40:06,711 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:40:06,752 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:40:06,790 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:40:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:06,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:40:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:40:06,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:18,248 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:40:18,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002443343] [2021-05-03 00:40:18,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002443343] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:40:18,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:40:18,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-03 00:40:18,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225958692] [2021-05-03 00:40:18,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-03 00:40:18,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:40:18,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-03 00:40:18,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2498, Invalid=3202, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 00:40:18,251 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:18,652 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 00:40:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:40:29,814 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-03 00:40:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-03 00:40:29,816 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-03 00:40:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:40:29,816 INFO L225 Difference]: With dead ends: 86 [2021-05-03 00:40:29,817 INFO L226 Difference]: Without dead ends: 81 [2021-05-03 00:40:29,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 21844.3ms TimeCoverageRelationStatistics Valid=7395, Invalid=13197, Unknown=0, NotChecked=0, Total=20592 [2021-05-03 00:40:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-03 00:40:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-03 00:40:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-03 00:40:29,827 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2021-05-03 00:40:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:40:29,827 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-03 00:40:29,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 72 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-03 00:40:29,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-03 00:40:29,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:40:29,828 INFO L523 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:40:29,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-03 00:40:29,828 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:40:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:40:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 644254744, now seen corresponding path program 68 times [2021-05-03 00:40:29,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:40:29,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953683714] [2021-05-03 00:40:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:40:29,836 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2487 100) InVars {main_~i~0=v_main_~i~0_2487} OutVars{main_~i~0=v_main_~i~0_2487} AuxVars[] AssignedVars[] [2021-05-03 00:40:29,846 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:40:29,848 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:40:29,861 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:40:29,898 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:40:29,932 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:40:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:30,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:40:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:40:30,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:40:42,306 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:40:42,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953683714] [2021-05-03 00:40:42,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1953683714] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:40:42,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:40:42,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-03 00:40:42,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271750813] [2021-05-03 00:40:42,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-03 00:40:42,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:40:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-03 00:40:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2569, Invalid=3283, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 00:40:42,309 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:42,551 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 00:40:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:40:55,575 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-05-03 00:40:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-03 00:40:55,578 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-03 00:40:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:40:55,578 INFO L225 Difference]: With dead ends: 87 [2021-05-03 00:40:55,579 INFO L226 Difference]: Without dead ends: 82 [2021-05-03 00:40:55,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 24902.9ms TimeCoverageRelationStatistics Valid=7607, Invalid=13563, Unknown=0, NotChecked=0, Total=21170 [2021-05-03 00:40:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-03 00:40:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-03 00:40:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 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) [2021-05-03 00:40:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-05-03 00:40:55,592 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2021-05-03 00:40:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:40:55,592 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-05-03 00:40:55,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:40:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-05-03 00:40:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-03 00:40:55,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:40:55,593 INFO L523 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:40:55,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-03 00:40:55,594 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:40:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:40:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1467550586, now seen corresponding path program 69 times [2021-05-03 00:40:55,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:40:55,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620893268] [2021-05-03 00:40:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:40:55,603 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2558 100) InVars {main_~i~0=v_main_~i~0_2558} OutVars{main_~i~0=v_main_~i~0_2558} AuxVars[] AssignedVars[] [2021-05-03 00:40:55,605 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:40:55,607 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:40:55,618 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:40:55,657 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:40:55,696 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:40:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:55,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:40:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:40:55,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:07,973 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:41:07,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620893268] [2021-05-03 00:41:07,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1620893268] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:41:07,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:41:07,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-03 00:41:07,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717214706] [2021-05-03 00:41:07,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-03 00:41:07,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:41:07,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-03 00:41:07,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2641, Invalid=3365, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 00:41:07,975 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 74 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) [2021-05-03 00:41:08,487 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 00:41:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:41:22,574 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-03 00:41:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-03 00:41:22,577 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 74 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 [2021-05-03 00:41:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:41:22,577 INFO L225 Difference]: With dead ends: 88 [2021-05-03 00:41:22,577 INFO L226 Difference]: Without dead ends: 83 [2021-05-03 00:41:22,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2422 ImplicationChecksByTransitivity, 25608.9ms TimeCoverageRelationStatistics Valid=7822, Invalid=13934, Unknown=0, NotChecked=0, Total=21756 [2021-05-03 00:41:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-03 00:41:22,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-03 00:41:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:41:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-03 00:41:22,587 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2021-05-03 00:41:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:41:22,587 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-03 00:41:22,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 74 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) [2021-05-03 00:41:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-03 00:41:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-03 00:41:22,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:41:22,588 INFO L523 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:41:22,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-03 00:41:22,588 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:41:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:41:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1785960920, now seen corresponding path program 70 times [2021-05-03 00:41:22,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:41:22,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338383814] [2021-05-03 00:41:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:41:22,597 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2630 100) InVars {main_~i~0=v_main_~i~0_2630} OutVars{main_~i~0=v_main_~i~0_2630} AuxVars[] AssignedVars[] [2021-05-03 00:41:22,602 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:41:22,604 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:41:22,615 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:41:22,662 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:41:22,705 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:41:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:22,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:41:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:41:22,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:31,647 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:41:31,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338383814] [2021-05-03 00:41:31,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [338383814] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:41:31,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:41:31,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-03 00:41:31,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288862525] [2021-05-03 00:41:31,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-03 00:41:31,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:41:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-03 00:41:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2714, Invalid=3448, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 00:41:31,649 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:41:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:41:46,744 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-05-03 00:41:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-03 00:41:46,749 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-03 00:41:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:41:46,749 INFO L225 Difference]: With dead ends: 89 [2021-05-03 00:41:46,749 INFO L226 Difference]: Without dead ends: 84 [2021-05-03 00:41:46,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2492 ImplicationChecksByTransitivity, 22534.8ms TimeCoverageRelationStatistics Valid=8040, Invalid=14310, Unknown=0, NotChecked=0, Total=22350 [2021-05-03 00:41:46,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-03 00:41:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-03 00:41:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 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) [2021-05-03 00:41:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-05-03 00:41:46,761 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2021-05-03 00:41:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:41:46,761 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-05-03 00:41:46,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:41:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-05-03 00:41:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-03 00:41:46,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:41:46,761 INFO L523 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:41:46,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-03 00:41:46,762 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:41:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:41:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash -434397498, now seen corresponding path program 71 times [2021-05-03 00:41:46,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:41:46,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769605954] [2021-05-03 00:41:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:41:46,772 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2703 100) InVars {main_~i~0=v_main_~i~0_2703} OutVars{main_~i~0=v_main_~i~0_2703} AuxVars[] AssignedVars[] [2021-05-03 00:41:46,775 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:41:46,806 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:41:46,823 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:41:46,859 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:41:46,929 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:41:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:47,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:41:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:41:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:41:47,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:41:59,880 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:41:59,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769605954] [2021-05-03 00:41:59,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [769605954] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:41:59,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:41:59,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-03 00:41:59,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833089711] [2021-05-03 00:41:59,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-03 00:41:59,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:41:59,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-03 00:41:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2788, Invalid=3532, Unknown=0, NotChecked=0, Total=6320 [2021-05-03 00:41:59,882 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 76 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:14,291 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-03 00:42:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 00:42:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 76 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-03 00:42:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:14,295 INFO L225 Difference]: With dead ends: 90 [2021-05-03 00:42:14,295 INFO L226 Difference]: Without dead ends: 85 [2021-05-03 00:42:14,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2563 ImplicationChecksByTransitivity, 26204.1ms TimeCoverageRelationStatistics Valid=8261, Invalid=14691, Unknown=0, NotChecked=0, Total=22952 [2021-05-03 00:42:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-03 00:42:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-03 00:42:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-03 00:42:14,305 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2021-05-03 00:42:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:14,305 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-03 00:42:14,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 76 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-03 00:42:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-03 00:42:14,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:14,305 INFO L523 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:14,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-03 00:42:14,306 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:14,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:14,306 INFO L82 PathProgramCache]: Analyzing trace with hash -546031720, now seen corresponding path program 72 times [2021-05-03 00:42:14,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:14,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881020090] [2021-05-03 00:42:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:14,314 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2777 100) InVars {main_~i~0=v_main_~i~0_2777} OutVars{main_~i~0=v_main_~i~0_2777} AuxVars[] AssignedVars[] [2021-05-03 00:42:14,326 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:42:14,329 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:42:14,348 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:42:14,422 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:42:14,496 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:42:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:14,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:42:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:42:14,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:30,253 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:42:30,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881020090] [2021-05-03 00:42:30,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [881020090] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:42:30,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:42:30,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-03 00:42:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133042607] [2021-05-03 00:42:30,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-03 00:42:30,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:42:30,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-03 00:42:30,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2863, Invalid=3617, Unknown=0, NotChecked=0, Total=6480 [2021-05-03 00:42:30,255 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 77 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) [2021-05-03 00:42:30,948 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 00:42:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:41,684 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-05-03 00:42:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-03 00:42:41,685 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 77 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 [2021-05-03 00:42:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:41,686 INFO L225 Difference]: With dead ends: 91 [2021-05-03 00:42:41,686 INFO L226 Difference]: Without dead ends: 86 [2021-05-03 00:42:41,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2635 ImplicationChecksByTransitivity, 25760.2ms TimeCoverageRelationStatistics Valid=8485, Invalid=15077, Unknown=0, NotChecked=0, Total=23562 [2021-05-03 00:42:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-03 00:42:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-03 00:42:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 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) [2021-05-03 00:42:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-05-03 00:42:41,697 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2021-05-03 00:42:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:41,697 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-05-03 00:42:41,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 77 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) [2021-05-03 00:42:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-05-03 00:42:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-03 00:42:41,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:41,698 INFO L523 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:41,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-03 00:42:41,698 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:41,698 INFO L82 PathProgramCache]: Analyzing trace with hash 288274694, now seen corresponding path program 73 times [2021-05-03 00:42:41,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:41,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771999978] [2021-05-03 00:42:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:41,705 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2852 100) InVars {main_~i~0=v_main_~i~0_2852} OutVars{main_~i~0=v_main_~i~0_2852} AuxVars[] AssignedVars[] [2021-05-03 00:42:41,707 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:42:41,728 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:42:41,738 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:42:41,755 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:42:41,786 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:42:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:41,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:42:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:42:41,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:42:49,690 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:42:49,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771999978] [2021-05-03 00:42:49,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771999978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:42:49,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:42:49,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-03 00:42:49,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241068111] [2021-05-03 00:42:49,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-03 00:42:49,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:42:49,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-03 00:42:49,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2939, Invalid=3703, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 00:42:49,692 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:42:50,156 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 00:43:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:43:01,395 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-03 00:43:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-03 00:43:01,398 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-03 00:43:01,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:43:01,399 INFO L225 Difference]: With dead ends: 92 [2021-05-03 00:43:01,399 INFO L226 Difference]: Without dead ends: 87 [2021-05-03 00:43:01,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 18443.0ms TimeCoverageRelationStatistics Valid=8712, Invalid=15468, Unknown=0, NotChecked=0, Total=24180 [2021-05-03 00:43:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-03 00:43:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-03 00:43:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-03 00:43:01,411 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2021-05-03 00:43:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:43:01,411 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-03 00:43:01,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 78 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-03 00:43:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-03 00:43:01,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:01,412 INFO L523 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:43:01,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-03 00:43:01,412 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:01,412 INFO L82 PathProgramCache]: Analyzing trace with hash 381969752, now seen corresponding path program 74 times [2021-05-03 00:43:01,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:01,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867615004] [2021-05-03 00:43:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:01,420 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_2928 100) InVars {main_~i~0=v_main_~i~0_2928} OutVars{main_~i~0=v_main_~i~0_2928} AuxVars[] AssignedVars[] [2021-05-03 00:43:01,425 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:43:01,452 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:43:01,466 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:43:01,498 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:43:01,554 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:43:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:01,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:43:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:43:01,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:11,032 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:43:11,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867615004] [2021-05-03 00:43:11,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [867615004] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:43:11,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:43:11,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-03 00:43:11,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071118063] [2021-05-03 00:43:11,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-03 00:43:11,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:43:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-03 00:43:11,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3016, Invalid=3790, Unknown=0, NotChecked=0, Total=6806 [2021-05-03 00:43:11,034 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:43:20,759 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-05-03 00:43:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 00:43:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.025) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-03 00:43:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:43:20,761 INFO L225 Difference]: With dead ends: 93 [2021-05-03 00:43:20,761 INFO L226 Difference]: Without dead ends: 88 [2021-05-03 00:43:20,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2782 ImplicationChecksByTransitivity, 18111.8ms TimeCoverageRelationStatistics Valid=8942, Invalid=15864, Unknown=0, NotChecked=0, Total=24806 [2021-05-03 00:43:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-03 00:43:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-03 00:43:20,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 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) [2021-05-03 00:43:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-05-03 00:43:20,773 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2021-05-03 00:43:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:43:20,773 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-05-03 00:43:20,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 80 states have (on average 1.025) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-05-03 00:43:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-03 00:43:20,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:20,773 INFO L523 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:43:20,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-03 00:43:20,774 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1008450746, now seen corresponding path program 75 times [2021-05-03 00:43:20,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:20,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538145932] [2021-05-03 00:43:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:20,781 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3005 100) InVars {main_~i~0=v_main_~i~0_3005} OutVars{main_~i~0=v_main_~i~0_3005} AuxVars[] AssignedVars[] [2021-05-03 00:43:20,783 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:43:20,785 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:43:20,794 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:43:20,834 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:43:20,865 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:43:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:21,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:43:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:43:21,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:33,901 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:43:33,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538145932] [2021-05-03 00:43:33,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [538145932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:43:33,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:43:33,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-03 00:43:33,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381379960] [2021-05-03 00:43:33,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-03 00:43:33,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:43:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-03 00:43:33,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3094, Invalid=3878, Unknown=0, NotChecked=0, Total=6972 [2021-05-03 00:43:33,903 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 80 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) [2021-05-03 00:43:34,585 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 00:43:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:43:47,905 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-03 00:43:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 00:43:47,909 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 80 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 [2021-05-03 00:43:47,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:43:47,910 INFO L225 Difference]: With dead ends: 94 [2021-05-03 00:43:47,910 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 00:43:47,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2857 ImplicationChecksByTransitivity, 25283.2ms TimeCoverageRelationStatistics Valid=9175, Invalid=16265, Unknown=0, NotChecked=0, Total=25440 [2021-05-03 00:43:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 00:43:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-03 00:43:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-03 00:43:47,919 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2021-05-03 00:43:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:43:47,919 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-03 00:43:47,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 80 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) [2021-05-03 00:43:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-03 00:43:47,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-03 00:43:47,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:47,920 INFO L523 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:43:47,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-03 00:43:47,920 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1161813224, now seen corresponding path program 76 times [2021-05-03 00:43:47,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:47,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086502660] [2021-05-03 00:43:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:47,929 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3083 100) InVars {main_~i~0=v_main_~i~0_3083} OutVars{main_~i~0=v_main_~i~0_3083} AuxVars[] AssignedVars[] [2021-05-03 00:43:47,934 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:43:47,966 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:43:47,984 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:43:48,028 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:43:48,106 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:43:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:48,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:43:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:43:48,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:43:58,444 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:43:58,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086502660] [2021-05-03 00:43:58,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086502660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:43:58,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:43:58,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-03 00:43:58,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107232014] [2021-05-03 00:43:58,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-03 00:43:58,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:43:58,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-03 00:43:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3173, Invalid=3967, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 00:43:58,446 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:58,881 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 00:44:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:44:13,094 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-05-03 00:44:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-03 00:44:13,096 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-03 00:44:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:44:13,097 INFO L225 Difference]: With dead ends: 95 [2021-05-03 00:44:13,097 INFO L226 Difference]: Without dead ends: 90 [2021-05-03 00:44:13,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 23791.4ms TimeCoverageRelationStatistics Valid=9411, Invalid=16671, Unknown=0, NotChecked=0, Total=26082 [2021-05-03 00:44:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-03 00:44:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-03 00:44:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 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) [2021-05-03 00:44:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-05-03 00:44:13,106 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2021-05-03 00:44:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:44:13,106 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-05-03 00:44:13,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:44:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-05-03 00:44:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-03 00:44:13,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:44:13,106 INFO L523 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:44:13,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-03 00:44:13,106 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:44:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:44:13,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1621082746, now seen corresponding path program 77 times [2021-05-03 00:44:13,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:44:13,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186672957] [2021-05-03 00:44:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:44:13,115 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3162 100) InVars {main_~i~0=v_main_~i~0_3162} OutVars{main_~i~0=v_main_~i~0_3162} AuxVars[] AssignedVars[] [2021-05-03 00:44:13,117 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:44:13,131 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:44:13,149 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:44:13,211 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:44:13,265 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:44:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:13,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:44:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:44:13,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:23,446 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:44:23,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186672957] [2021-05-03 00:44:23,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [186672957] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:44:23,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:44:23,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-03 00:44:23,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033988650] [2021-05-03 00:44:23,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-03 00:44:23,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:44:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-03 00:44:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3253, Invalid=4057, Unknown=0, NotChecked=0, Total=7310 [2021-05-03 00:44:23,448 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 82 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:44:23,688 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 00:44:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:44:40,928 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-03 00:44:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-03 00:44:40,932 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 82 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-03 00:44:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:44:40,932 INFO L225 Difference]: With dead ends: 96 [2021-05-03 00:44:40,932 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 00:44:40,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3010 ImplicationChecksByTransitivity, 26651.0ms TimeCoverageRelationStatistics Valid=9650, Invalid=17082, Unknown=0, NotChecked=0, Total=26732 [2021-05-03 00:44:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 00:44:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-03 00:44:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:44:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-03 00:44:40,942 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2021-05-03 00:44:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:44:40,942 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-03 00:44:40,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 82 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:44:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-03 00:44:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-03 00:44:40,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:44:40,943 INFO L523 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:44:40,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-03 00:44:40,943 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:44:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:44:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1321431256, now seen corresponding path program 78 times [2021-05-03 00:44:40,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:44:40,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324922658] [2021-05-03 00:44:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:44:40,952 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3242 100) InVars {main_~i~0=v_main_~i~0_3242} OutVars{main_~i~0=v_main_~i~0_3242} AuxVars[] AssignedVars[] [2021-05-03 00:44:40,955 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:44:40,957 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:44:40,975 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:44:41,048 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:44:41,127 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:44:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:41,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:44:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:44:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:44:41,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:44:54,642 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:44:54,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324922658] [2021-05-03 00:44:54,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [324922658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:44:54,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:44:54,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-03 00:44:54,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476452887] [2021-05-03 00:44:54,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-03 00:44:54,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:44:54,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-03 00:44:54,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3334, Invalid=4148, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 00:44:54,644 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 83 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) [2021-05-03 00:44:54,860 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 00:45:10,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:45:10,380 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-05-03 00:45:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-03 00:45:10,382 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 83 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 [2021-05-03 00:45:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:45:10,382 INFO L225 Difference]: With dead ends: 97 [2021-05-03 00:45:10,382 INFO L226 Difference]: Without dead ends: 92 [2021-05-03 00:45:10,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3088 ImplicationChecksByTransitivity, 28529.7ms TimeCoverageRelationStatistics Valid=9892, Invalid=17498, Unknown=0, NotChecked=0, Total=27390 [2021-05-03 00:45:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-03 00:45:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-03 00:45:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 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) [2021-05-03 00:45:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-05-03 00:45:10,394 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2021-05-03 00:45:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:45:10,394 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-05-03 00:45:10,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 83 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) [2021-05-03 00:45:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-05-03 00:45:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-03 00:45:10,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:10,395 INFO L523 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:10,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-03 00:45:10,395 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1949915194, now seen corresponding path program 79 times [2021-05-03 00:45:10,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:10,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833511380] [2021-05-03 00:45:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:10,403 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3323 100) InVars {main_~i~0=v_main_~i~0_3323} OutVars{main_~i~0=v_main_~i~0_3323} AuxVars[] AssignedVars[] [2021-05-03 00:45:10,405 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:45:10,407 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:45:10,419 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:45:10,465 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:45:10,514 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:45:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:10,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:45:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:45:10,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:23,865 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:45:23,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833511380] [2021-05-03 00:45:23,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833511380] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:45:23,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:45:23,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-03 00:45:23,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451230409] [2021-05-03 00:45:23,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-03 00:45:23,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:45:23,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-03 00:45:23,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3416, Invalid=4240, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 00:45:23,866 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:45:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:45:39,722 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-03 00:45:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 00:45:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-03 00:45:39,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:45:39,726 INFO L225 Difference]: With dead ends: 98 [2021-05-03 00:45:39,726 INFO L226 Difference]: Without dead ends: 93 [2021-05-03 00:45:39,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3167 ImplicationChecksByTransitivity, 27578.0ms TimeCoverageRelationStatistics Valid=10137, Invalid=17919, Unknown=0, NotChecked=0, Total=28056 [2021-05-03 00:45:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-03 00:45:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-03 00:45:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:45:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-03 00:45:39,739 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2021-05-03 00:45:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:45:39,739 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-03 00:45:39,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 84 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:45:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-03 00:45:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-03 00:45:39,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:39,740 INFO L523 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:39,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-03 00:45:39,740 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:39,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:39,740 INFO L82 PathProgramCache]: Analyzing trace with hash -282440040, now seen corresponding path program 80 times [2021-05-03 00:45:39,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:39,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092263521] [2021-05-03 00:45:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:39,749 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3405 100) InVars {main_~i~0=v_main_~i~0_3405} OutVars{main_~i~0=v_main_~i~0_3405} AuxVars[] AssignedVars[] [2021-05-03 00:45:39,751 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:45:39,753 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:45:39,767 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:45:39,814 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:45:39,880 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:45:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:40,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:45:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:45:40,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:45:53,445 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:45:53,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092263521] [2021-05-03 00:45:53,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092263521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:45:53,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:45:53,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-03 00:45:53,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759894762] [2021-05-03 00:45:53,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-03 00:45:53,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:45:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-03 00:45:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3499, Invalid=4333, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 00:45:53,447 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:45:54,006 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 00:46:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:46:10,084 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-05-03 00:46:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-03 00:46:10,088 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-03 00:46:10,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:46:10,088 INFO L225 Difference]: With dead ends: 99 [2021-05-03 00:46:10,088 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 00:46:10,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 28500.6ms TimeCoverageRelationStatistics Valid=10385, Invalid=18345, Unknown=0, NotChecked=0, Total=28730 [2021-05-03 00:46:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 00:46:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-03 00:46:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 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) [2021-05-03 00:46:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-05-03 00:46:10,098 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2021-05-03 00:46:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:46:10,098 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-05-03 00:46:10,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:46:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-05-03 00:46:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-03 00:46:10,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:46:10,099 INFO L523 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:46:10,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-03 00:46:10,099 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:46:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:46:10,099 INFO L82 PathProgramCache]: Analyzing trace with hash -130317818, now seen corresponding path program 81 times [2021-05-03 00:46:10,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:46:10,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700923304] [2021-05-03 00:46:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:46:10,107 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3488 100) InVars {main_~i~0=v_main_~i~0_3488} OutVars{main_~i~0=v_main_~i~0_3488} AuxVars[] AssignedVars[] [2021-05-03 00:46:10,109 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:46:10,135 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:46:10,148 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:46:10,176 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:46:10,232 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:46:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:46:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:46:10,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:22,971 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:46:22,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700923304] [2021-05-03 00:46:22,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [700923304] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:46:22,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:46:22,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-03 00:46:22,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704464268] [2021-05-03 00:46:22,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-03 00:46:22,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:46:22,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-03 00:46:22,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3583, Invalid=4427, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 00:46:22,973 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 86 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) [2021-05-03 00:46:23,552 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 00:46:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:46:35,462 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-03 00:46:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-03 00:46:35,464 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 86 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 [2021-05-03 00:46:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:46:35,464 INFO L225 Difference]: With dead ends: 100 [2021-05-03 00:46:35,464 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 00:46:35,465 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3328 ImplicationChecksByTransitivity, 23891.6ms TimeCoverageRelationStatistics Valid=10636, Invalid=18776, Unknown=0, NotChecked=0, Total=29412 [2021-05-03 00:46:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 00:46:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-03 00:46:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:46:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-03 00:46:35,473 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2021-05-03 00:46:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:46:35,473 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-03 00:46:35,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 86 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) [2021-05-03 00:46:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-03 00:46:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-03 00:46:35,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:46:35,473 INFO L523 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:46:35,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-03 00:46:35,474 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:46:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:46:35,474 INFO L82 PathProgramCache]: Analyzing trace with hash 290503768, now seen corresponding path program 82 times [2021-05-03 00:46:35,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:46:35,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678911495] [2021-05-03 00:46:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:46:35,488 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3572 100) InVars {main_~i~0=v_main_~i~0_3572} OutVars{main_~i~0=v_main_~i~0_3572} AuxVars[] AssignedVars[] [2021-05-03 00:46:35,490 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:46:35,514 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:46:35,526 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:46:35,546 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:46:35,580 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:46:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:35,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:46:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:46:35,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:46:43,729 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:46:43,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678911495] [2021-05-03 00:46:43,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678911495] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:46:43,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:46:43,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-03 00:46:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775197107] [2021-05-03 00:46:43,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-03 00:46:43,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:46:43,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-03 00:46:43,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3668, Invalid=4522, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 00:46:43,731 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:46:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:46:54,681 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2021-05-03 00:46:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-03 00:46:54,683 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-03 00:46:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:46:54,684 INFO L225 Difference]: With dead ends: 101 [2021-05-03 00:46:54,684 INFO L226 Difference]: Without dead ends: 96 [2021-05-03 00:46:54,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3410 ImplicationChecksByTransitivity, 18045.2ms TimeCoverageRelationStatistics Valid=10890, Invalid=19212, Unknown=0, NotChecked=0, Total=30102 [2021-05-03 00:46:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-03 00:46:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-03 00:46:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 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) [2021-05-03 00:46:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-05-03 00:46:54,701 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2021-05-03 00:46:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:46:54,701 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-05-03 00:46:54,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:46:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-05-03 00:46:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-03 00:46:54,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:46:54,701 INFO L523 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:46:54,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-03 00:46:54,702 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:46:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:46:54,702 INFO L82 PathProgramCache]: Analyzing trace with hash 451071046, now seen corresponding path program 83 times [2021-05-03 00:46:54,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:46:54,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113459694] [2021-05-03 00:46:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:46:54,709 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_3657 100) InVars {main_~i~0=v_main_~i~0_3657} OutVars{main_~i~0=v_main_~i~0_3657} AuxVars[] AssignedVars[] [2021-05-03 00:46:54,711 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-03 00:46:54,712 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:46:54,722 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-03 00:46:54,762 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-03 00:46:54,799 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:46:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:54,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:46:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:46:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:46:54,920 WARN L159 QuantifierPusher]: Ignoring assumption.